My own bikes have been a child's tricycle, a bicycle made by Triang with solid rubber tires, a single rod brake that operated on the front tire and awful *stabilisers fitted that probably did not help at all, a 20" and a 24" bike with very rusty rims, chain, stirrup (rod) brakes that was as much as I could afford with my pocket money. My father promised me his Lenton Sports bike when I was big enough to ride the bike which is my first bike with gears. Very much lighter to pedal and flew when I touched the pedals. My sister's then-new ~1974, 3-speed unisex "Shopper" bike, was a heavy bike that was heavy to pedal.
Picture left; close ratio 4 speed, FM and AF hubs (which are the same hubs with newer and older code) use a second epicyclic gear coupled to the main epicyclic gear to achieve the medium or close ratios. Similar to AR close-ratio 3-speed hub introduced two years earlier [Pg 105/106]. The second epicyclic gear drives the sun pinion. The later FW uses a single epicyclic gear.
The 1945 model FW 4-speed wide hub, that is fitted on this Lenton Sports bike is different. The epicyclic gear has a single ring gear but one of two sun pinions is engaged using dog clutches to the stationary shaft to provide a super-low bottom gear, which was changed a little during 1950. This is an efficient gear hub that was made until 1969/70 and is counted as one of a set of acclaimed 4-speed hubs.
The picture left, from the Sturmey-Archer Story is the plaque awarded to Sturmey-Archer by the Cycling Touring Club for the greatest advance in cycling design or equipment for their 4-speed hubs in 1939. [pg 105/106].
Austin 7 1931 (www.historics.co.uk) |
Raleigh has often made powered two and three-wheel vehicles. |
Things changed - in the 1970' new cars were delivered with faults - poor management in British industry - designed in obsolescence and designed to ware-out;
Timex watches can run without maintenance for 50 years but my 1974 day, date, and time Timex (pictured right) was made to wear out in 5 years when the knurling on the winder wore away. You could have the winder replaced by a better winder but I fitted a piece of rubber sleeving periodically and the watch remained very accurate for 30 years. When wound up every morning was accurate all winter, losing 1 minute a month in the summer and 2 minutes a month in the hottest month. Evidently designed to wear out and had been well-engineered so that just one part would not last too long so that the watch would not be compromised until after the warranty period had ended but probably before the sale of goods act guarantee had expired. My patch was to fit and to keep replacing a rubber sleeving onto the winder or to wind the watch with a rubber band stretched across your fingers. Timex is an American company that has operated in Scotland since 1946 and also manufactures for other companies.
The 1970s marked a time when life had become easier, with full employment and virtually no homeless (in reality there were a lot of homeless but in bigger cities). Mortgages, pensions, and financial services were trusted by mutual and friendly societies and that was what most people used. The banks still had their founding Quaker or other philosophy of supporting and looking after their customers but these things changed. Significantly more things were designed to wear out or were badly made so they wore out before a useful time, the novelty wore off or they become obsolete quickly and were discarded. There was little place for repairing shoes and bikes and what was repaired was carried out by replacement of a module rather than of a worn or broken part. Built-in wear-out had already been the case for example valve TVs designed with the valves over-stressed, 1930's Ford cars with cheap manufacturers regulated prices on parts and maintenance. A ford engine designed to last only 25,000 miles* (that is as long as a ~1935 Ford Anglia manufacturer's gold-seal replacement engine lasted purchased in the 1950s). Most small cars of this time engines did not last longer than 15,000 miles* but the engine was designed to be reconditioned three times. More people chose things that only needed to last long enough to buy, open, be played with briefly and then be discarded, so many British manufacturers tried to follow the trend but cut costs instead, and failed because they started producing rubbish instead. Raleigh bikes went with the trend, changing enough but continued manufacturing good quality bikes in the UK until 2012, bike makers did not need to design in obsolescence or to wear out many bikes are and have always been bought but then ridden just once.
Yashicamat Camera - Vivitar flash - Strativ Tripod |
During the post-war (political) consensus until 1980 - if you could do the job you were given the job. There was a place for philanthropic, commercial and government services and investment called, The mixed economy, which regulated so that what worked was done. Significantly manufacturing and engineering were still supported. The British prejudice against engineers being people who work on dirty engines as opposed to ingenuity the correct meaning was always true. The Technician makes the dirty engine, clean, working and functioning, or the design proving or reporting design improvements or flaws using his dexterity and skill, often called in a derogatory way a grease monkey for a car mechanic (technician). Craftsman is the most prestigious type of technician. There was an expectation to be employed and anyone would feel or be made to feel very uncomfortable about being unemployed. Generally, periods of unemployment lasted just a day. For longer-term unemployment state national insurance paid unemployment pay and your mortgage interest was paid.
At the end of the 1970's the problems in British industry were in hand or had been fixed by the government and union initiatives such as ethics in BAE Scotland, The Lucas Plan, and Triumph motorbike Cooperative. To protect against monopolies from unfair pricing was addressed by the creation of the British Sugar Corporation, Giro-Bank (not that sugar prices should be regulated which surely conflicts with public health). Rolls Royce aero engine part of that business became state-owned (1971-1987) and the RB211 jet engine development was one of the most efficient in its time. High-value investment and return supported by National Enterprise Board {significantly Ferranti and its Uncommitted Logic Array (ULA)}, also British Leyland (significantly the Mini Metro car) was resolved even though unionised workforce lost jobs to robot assembly. The National Coal Board and British Rail had already been successfully nationalised in 1946 and 1948 from failing private companies so British deep mine coal was the cheapest and safest in the world (National Union of Miners early 1980s). The working week had reduced from up to 48 hours prior to world war two to typically 40 hours a week but many worked 37.5 hours and the number of hours were reducing towards 35 hours in some cases with up to 30 days annual holiday.
1946 LENTON sports (Raleigh);
My father was promised the bike if he matriculated (pass his school-leaving exams) his mother paid £19 and something (£19/14/- is the listed price) but under £20 with the extras (would be £1,200 in 2022*). Evidently, my father had to wait until after leaving school in 1945 for the war to end and for his bike to be delivered. There are two numbers on the frame which confirm the date of early 1946, my father was conscripted that June and returned 18 months later.
Frame number; 289193 P (below the saddle)
This Lenton Sports bike is an MK II [web], Model 25 [Facebook]. Picture right some cleaning shows the lovely steel chain wheel (front cog 2018), the picture above more cleaning also wiped down with linseed oil a few times (2020). The plastic bottle top used as a pedal cap has since been replaced with the correct cap given by a Facebook friend, thanks.
The FW, 4-speed wide hub. 4-speed Sturmey-Archer gears have a reputation for being unreliable. The hub's date code is 50 1, (January 1950), which may be an upgrade or a warranted replacement. The selector and probably the rear wheel were changed as part of the hub replacement because the plating is a different quality more bobbly on the rear wheel. The rear wheel is 40, 2mm zinc plated but the rusted spokes seem to be all original. The front wheel has 32, 1.5mm bright steel spokes and all of the spokes have been replaced at least once. My father chose a more comfortable saddle instead of the standard sports bike saddle. The saddle has also been re-stitched a little more by a local shoe repairer since these pictures. I have also been replacing springs in the saddle (2021) but this is not working out so well.
A good steel frame bike is fantastic. Some people speculate that the art of making a good steel frame bicycle has been lost.
Picture right above; The LENTON sports decoration has a flat top with 45' corners and a gold outline and probably is a transfer but could be stencilled? The letters are italic capital 3D polychromic green as the bike and deep blue shadow outline, I think. On the tube section from the bottom bracket to the steering column, the words ALL STEEL are painted red with a black 3D shadow or outline.
Comparison with other bikes;
The Universal's (Universal cycles Ltd) bike gear cable path is mostly unsheathed running over a nylon slide under the bottom bracket. The gear change is very smooth on this bike consequently. |
The Raleigh Record Ace (RRA) was a custom-made-to-order and the most expensive Raleigh bike that only some dealers could sell. The Lenton Sports MK I, MK II or Lenton Clubman MK III were the top-of-the-range standard bike that all dealers could sell, I understand. The RRA is a lighter-weight bike at 27Lbs (12kg) with panniers, 9Kg with lightweight wheels, 1" (25mm) greater ground clearance and has a number of racing records. These bikes cost about 50% more than the same manufacturer's top-of-the-range bike. Otherwise, the Raleigh price ranged by 2:1 between the top of the range and basic adult bikes. The RRA has a time of 3 hours, 40 minutes (Ray Booty 1950s) and at least one 1948 Olympics medal held by Reg Harris who otherwise trained on and endorsed the Lenton. This bike changed over the years weighing 14Kg in 1939.
Similarly, many manufacturers supplied different dealers with a broader or a narrow range of parts, accessories and bikes - it used to be necessary to visit another town to find out about and obtain things. By comparison since 1980, it has become normal to only find a limited range of the same things anywhere. It is now very unusual to find different things and the expectation of speaking to trained staff on the use and the type of product is now not expected or offered. This uniformity and narrowing of choice were promoted, at the time, as "choice".
January 1950 stainless steel FW variable gear hub |
The bike's four-speed selector (picture below right); Has one patent number 498,820 on it. In 1948 some modifications were made including a modification to reduce rattling in the selector. This modified selector has two patent numbers the second patent number is 649,009 which distinguishes the two types but the second number is not on my gear selector. The gear selector is also a 1950 type no doubt changed with the gear hub and rear wheel perhaps without all the earlier changes incorporated? There were many revisions of the selector but in the typically British way, many parts were common to different types of hub gears.
Green brake pads leave green dust coating on parts nearby |
With a hub variable gear, the rider can switch (change) gear easily with the bike stationary or moving here are four methods;
- Move the pedals backwards whilst moving the selector. This works well with an AW 3-speed hub or any Sturmey-Archer hub.
- Move the pedals in a forward direction but apply minimal pressure on the pedals whilst moving the selector lever. This only works with vintage/veteran Sturmey-Archer hubs or hubs that are particularly well set up. This is Sturmey-Archer's traditional recommended method.
- Whilst the bike is rolling and your feet are on the pedals stop pedalling then move the lever. There is enough movement in your feet for the hub to change gear but this method won't work with your feet off the pedals.
- Move the gear lever up one or many speeds when you like the gear change will occur when you take your pressure off the pedal a feature that prevents gear change when putting pedalling effort through the transmission. On the Lenton which has a weak trigger spring, changing up one speed is best done with the lever held between two fingers.
It is said that after Sturmey-Archer was sold in 2000 and the tooling exported to Taiwan the quality of the hubs improved again but some things were wrong. For example, the cable could not be adjusted to select all gears on an S5 hub, I have been told. I guess some of the knowledge (knack) could not all be conveyed when the tooling was exported?
Technical detail observed;
The mechanism selects easily. There is a feature since 1910-1912 to hold the gear even if the cable is not optimally adjusted but this feature is not on all hubs or speeds (if I have understood correctly). Sturmey-Archer patented very many modifications but most of them were not implemented. All gears are in constant mesh but are selected using dog clutches or selectively disengaging the free-wheel pawls. One of the dog clutches is chipped (the bike used to click in Normal [3 of 4] probably from new).
- The gear selection had been fine in 1970 but deteriorated and the cable broke in the 1970s over the pulley under the saddle which I replaced. The gear selection was then much poorer and I only had three of the four speeds 1, 2 and 4 or 2, 3 and 4. The hub was cleaned and the compensator spring and the pawl springs were replaced but this did not resolve the problem. I then shorted the sheathed cable length to the maximum of 18" and ground the cut end of the sheath cable flat as pictured, with a carborundum stone. Lastly, I added the tape pictured to minimise the change in length in the cable when steering. I also do not carry any weight in the right-hand pannier because that weight will knock speed N out of gear.
19XX - Fichtel & Sachs Universal-Torpedo (strewi-fahrradwerke.de) - Brochure of some features such as ball bearings in the idler gears was a selling point rather than beneficial. BSA made the S-A earlier X series 3-speed hub built under licence had a similar feature - The claimed a friction reduction and silkiness was only on a part that contributes a very small amount of friction - so the claim was misleading and the ball bearing stopped being fitted in due cause anyway by S-A and BSA.
Strewi Fahrradwerke – Über historische Fahrräder (strewi-fahrradwerke.de) - more documents and history (I can't read it because it is in German).
The Lenton sports soon after I took it out of the shed, fixed the gear selector and started cleaning but you can see reddish rust on the frame. |
- Oil the bike weekly or fortnightly with a quarter of a teaspoon of 20 SAE oil in the hub when using the bike and then the bike will last almost indefinitely. First, scrub with a brush if necessary but in any case, wipe off the dirty oil with a rag.
- The bike will need tires, brake blocks, tubes some adjustments including the spokes from time to time and after 100,000 miles will need new sets of ball bearings, which are cheap to buy. Apparently, the chain may be okay at 100,000 miles if is on an enclosed type of bike. It depends on the terrain the Lenton's chain is not worn but stretched there are long steep hills into Sevenoaks where the bike did most of its use.
- I have seen pictures of sprockets warn down to spikes but it is said that an AW hub will still look as if it were made that morning inside.
- +++ A postman used his 1910 bike for 50 years 75 miles a day. He had his bike serviced and many parts including forks were replaced under guarantee and Raleigh and never charged for the parts. +++++
- Another bike had done 500,000 miles when the AW (I think) hub was inspected it looked like it had been made that morning inside.
- A very heavy person using a bike up steep hills and 7 miles a day may find a modern mountain bike the best but they wear out a bike every 5 years.
- Oil in the hubs will run down the spokes and eventually onto the rims but I have not found it gets onto the braking surfaces. Judge how much you use, you will not find oil gets to the brakes. If you do low mileage then put less than the teaspoon of oil the recommended weekly or fortnightly.
- Modern oils are better and a few drops of thin oil such as barbers clipper oil a week is good advice. I use a thin engine oil which is thicker, is fine and can be done a little less often consequently. Traditionally advice differs, and I believe, is one teaspoon first use then 1/4 to 1/2 teaspoon of oil every 100 miles but of 20 SAE oil. A tin of Sturmey-Archer oil I purchased in the 1970s is a thicker oil and probably is 30 SAE - the tin does not state the viscosity of the oil? Bikes used to be coated in oil and dirt but ran well being fed with a lot of oil to keep the dirt out of the bearings.
The wheel rims are stamped Dunlop 26" x 1 1/4" the front tire is Dunlop war grade Tandem V, 26" x 1 1/4". The chrome is quite thick and bobbly in places on the wheel rims although the chrome on the bike is smooth. Raleigh used to claim in the 1930s that their chrome was the best and that claim does not seem to be exaggerated. I've seen poorer chrome finish on 1960's cars.
Steel had brazed joins and the joins were made of single pieces of forged metal for comparative; strength and lightness.
Unfortunately, the bike was stored in a shed with one wheel in the mud, this has caused a little corrosion to eat into the rim which caused one brake pad to keep wearing out for a while but the corrosion is not enough to have weakened the wheel. Otherwise, the bike's polychromic green paint has mostly fallen off. The little of the polychromic green paint that has survived was heavily coated in oil and dirt - evidently, cycle oil has protected the paint. The MK2 Lenton sports' gold decoration could be a shield or most likely a serrated javelin head pointed to the ground in a distinctly modern style rather than the pre-WW2 swirling designs in the decoration. The decoration is on the post-WW2 Lenton's up until the 1948 London Olympics after that other decorations are added and a range of bike colours with the introduction of the MK3 Lenton including the Reg Harris Olympic Torch decoration.
- The paint is called Polychromatic Green in the next model; MK III, Lenton Clubman. The 1946-47 MKII Lenton Sports. The technical differences between the bike models and the Lenton Sports, MK I and MK II becomes the Lenton Clubman MK III in 1949.
- The first Lenton was in 1940, MK1 lady's bike, it does not mention that Reynolds 531 steel was used, but this use of aircraft steel became a feature after WW2. I am advised that Reynolds 531 steel was used on sports bicycles from 1935 when it first became available but I have not found it mentioned on catalogue pages. The frame on its own is very light and can be lifted with two fingers. Lightweight Molednum and manganese steel frames were made and labelled on those bikes before that time but the brand does not seem to be mentioned
- Sports bikes had a label certifying Maganese, Moldendum or high tensile strength steel or later Reynolds 531 steel. This gold label can not be read now but probably such a label gold label at the top of the tube section between the bottom bracket and the saddle. It could be the dealer in Sevenoaks' label?
- Other MK2 Lenton sports bikes do have the Reynolds 531 Steel label but there are other differences between each bike made. The differences are not in any way seem compromised by post-war shortages and the make-do policy of the time but everything is just perfect for the job required.
- The British molybdenum, manganese, medium carbon (contains iron is magnetic and will rust) steel frame is Reynolds 531 Steel. This type of frame makes the Lenton sports noticeably very light compared with some folding bikes and light compared to most ordinary town bikes. The bike would weigh originally with the standard saddle under 14Kg and a conventional steel men's sports bike 1.2 Kg more. By comparison, modern good bikes such as 2019, step-through Pashley Cycles with brazed jointing (lugged and braised) not welded frame weigh 20Kg.
- The bikes made after the end of World War Two (September 1945) would have been made the best that was possible with available stock. Sturmey-Archer briefly stopped making hubs in 1943. These bikes were made to last and they do last. The four-speed (FW) hubs have a justified reputation for not working properly but they are very nice when they do.
Bluemels bicycle or motorbike pump |
I have also replaced the rubber seal/valve with a car brake cylinder rubber seal successfully. The connecting tube is also patched at one end using some cloth and cotton thread binding. The pump catches my hand and is uncomfortable, works with Dunlop valve tubes but it does not work with modern Presta valve tubes. The pump is therefore not usable on the bike now.
Tire Arithmetic - this seems to work properly for an old bike;
What does 597mm_32mm mean?
31.75mm = 1.25" x 25.4; Rounds up to; 32mm
660.5mm = 597 + (31.75 x 2)
26" = 660.5mm / 25.4; The tire diameter agrees.
597mm is the tire bead diameter so if you measure a rim's circumference where the bead of the tire sits and divide by pi (3.143) you will get this number.
So what does 650A, E? mean? It is a tire size code, not a dimension.
The tire's outside diameter is larger than 660mm (26") but that figure is roughly the wheel's outside diameter when fully inflated and the bike is carrying the rider's weight. If the measurement on the tube, tire and rim are all the same then they will all fit but a bike shop is unlikely to have those on the shelf for an old bike.
Warning I have looked at a newer bike tube and tires and this arithmetic does not work out for those. The tire diameter says 660mm is important for a mountain bike, but different widths of about 38-55mm are interchangeable. This is also true of the tubes. The problem though is the tolerance tends to be poor so they can almost fall off or be very tight as I have found with both bikes. It is, in any case, important to bed the tire in by partially inflating the tire and bouncing and turning the wheel on the ground (to bed the tire in). Check the tire pressure each time before you go out on the bike for the first few times the tire will keep needing more air until the tire is fully bedded. In conclusion, the number 26' for a mountain bike is just a number related to the bead diameter - wheel rim diameter and is what this code determines in this case.
Because the tire is a tight fit (bike shops are likely to get in and sell you the wrong size tubes and tires and may tell you what they have got in for you will be suitable but it probably won't be suitable) so fit the tire and remove it without the tube before you try with the tube. Also, move the cloth tube protector I added more cloth from a ripped-down cotton bed sheet. Also, check that the ends of the spokes are below the surface of the nuts they would have been adjusted over the life of the bike.
Spokes - I had been putting off dealing with a wobble in the front wheel for the past 50 years but I have done it now (2019). The front spokes would have been Raleigh Bright Steel (which is brilliant and all have been replaced a few times undoubtedly). The rear spokes are original thicker galvanised steel spokes I fitted 45 years ago and set to the same tension as the neighbouring spokes;
1. Firstly even up the spoke tensions they all played different tunes when plucked but I am advised that squeezing adjacent spokes is a better way - I think either way is fine. Start from the valve so that one revolution can be determined. I felt the spoke tension by squeezing two spokes together on a few new bikes in a bike shop.
2. Tighten any loose spokes to just firm then slacken any spokes that are unduly tight.
3. Making a small adjustment of 1/4 turn a spoke per wheel revolution and start from the valve. The loosest spokes first. keep going around bring up the loosest spokes. That is making small adjustments at a time.
4. I was expecting the wheel to go eccentric at this stage and this had always worried me dealing with two parameters and I had considered a strategy before I started but the issue did not arise.
5. Watch the wheel rotate next to a brake shoe and stop it when the gap closes. You can use a piece of wood held pressed against the frame or brake part to help gauge the closest distance.
6. Loosen two spokes on one side and tighten one the other side a quarter of a turn.
7. Watch the gap on the other side do the same adjustment and keep doing the same swapping sides back and forth.
8. I found the wheel is not eccentric but the remaining wobble is smaller.
9. Repeat the spoke tension adjustment - but I am told this is not usually done. It is important though because some spoke were still very loose.
10. Check the wobble but in any case, you will be close enough and when the bike is ridden I did not see any wobble in the rim or the tire.
Lacing the spokes; The bike is laced so that the spoke comes out 90' from the hole so therefore the spoke is slightly longer than the rim radius the diameter hub makes little difference. Therefore you may be able to replace the hub type and re-use the spokes that you could not do if the wheel is laced at a lesser angle (45' say) to the hole. 90' is the strongest strategy for the twisting force on the wheel.
The arithmetic for calculating spoke length is simple Pythagoras break down to right angle triangle(s) sum of the square of the longest side is the spoke length equals the sum of the squares of the other two sides. These calculators can do it for you;
https://www.sapim.be/spoke-calculator
https://www.sheldonbrown.com/rinard/spocalc.htm
My local bicycle shops had a stock of exactly the right spoke it did not need cutting down - I offered the broken spoke and the shop matched it. The only difference is that the thread is slightly different so it is necessary to take the wheel off and replace the new nut and spoke (4/2020). Technically the spokes are the same thread but the new spokes and nuts are made to closer tolerance and anyway the old spokes and nuts seem to have worn so they bind on the new spokes.
The rear (which has the newer 1950 FW hub) wheel's spokes are all thicker grey galvanised steel some have a little surface rust and some needed a little tensioning. The wheel runs very true despite the extra weight the wheel carries but the back wheel does not get the shocks and hits that the front wheel gets. A rider normally transfers their weight to the pedals thereby transferring the shock to their bent legs away from the rider's body and the bike. Evidently, this has made a lot of difference.
Much of the serrated shield and gold outline decoration has been worn. But the stainless steel hubs and other parts are almost like new. |
- ACF-50 (which leaves the metal white) and Hammerite (which turns the rust black).
- Hammerite works well. This leaves the metal black.
- Autosol has been recommended to me by a motorbiker, for chrome but I have not tried it. The correct one for chrome is Autosol M1.
- Just leave it and let the oil comes out of the hubs and carry on protecting other parts. Has worked well but stains your fingers and clothes.
- For chrome, I've been recommended wire wool, T-cut or Brasso but also rub aluminium foil.
- These are drastic methods that may only work once because you rub through paint or chrome quickly.
- I have not used these methods.
- Soaked in CLR for a bit and scrubbed with a copper scrubber. Then used Turtle Wax Chrome cleaner and polish. Said to be safer than aluminium foil. The result looks very good on Facebook.
- Linseed oil [is flammable so be careful not to leave any soaked rags in the sun] - turns rust-brown and does not look so good but looks okay and is said to be good on the paint
- The colour does not change but is brought out by cleaning off the black oil and dirt. The Heron badge is a lovely deep tarnished brass.
- It has been suggested to me that using linseed oil on the transfer decoration particularly was risky and that I should use mineral oil.
- Citric acid a bit stronger than lemon juice is said to clean rust - I've seen this on you-tube it looks good but I don't know how well it compares with other methods?
- Vinegar (acetic acid) diluted is said to work better and I have found it works in all cases and works very well in some cases.
- Acetone (such as nail varnish remover) is environmentally bad and will strip paint if not used and cleaned quickly but is also the most effective way of removing the sticky oil that acculturates on lubricated metal surfaces such as spokes and hubs. But with more work White spirit also works and is less harmful to the paint if inadvertently gets on the paint.
- Cleaning inside the hub can successfully restore function, I am advised. Simply dismantling cleaning and reassembling. Soaking in white spirit or paraffin is unlikely to work. Ultrasonic cleaner probably is best in this case.
- Old oil paintings and probably a dirty painted bike decoration can be cleaned with acetone with a very quick wipe-over. I have used linseed oil as a safer option on the bike.
- Scrapping with wooden lolly sticks is very effective as well and is safer than using a metal screwdriver.
- The stitching of the saddle has deteriorated although the leather looks exceptionally good. By comparison, the tool pouch, saddlebag and pedal shoe grips which had leather straps had all deteriorated and had been discarded by 1970. I do have a comparable quality pair of shoes but things of this quality were available but not at an excessive price but you needed a recommendation.
- There are two particularly good shoe repairers in Tunbridge Wells; Guest's in Mount Ephraim, Tunbridge Wells will take on more difficult work and work that might not turn out well. He has done a very nice job hand stitching the saddle which looked inaccessible to stitch and the repairer said was difficult.
- The comfortable Raleigh saddle fitted from the new probably weighs 1.2Kg. A cheap but good modern saddle with memory foam can be comfortable and lighter and I have used one of those whilst having the old saddle stitched and repaired.
The decoration on the bike is new modern and forward-looking, in keeping with the time, The Labour Government and the NHS. The pre-World War two Lenton Sports decoration has William Morris-style swirls and curves. Later many more decoration styles and frame colours were added for different variants. The bike was made at the beginning of the period 1945 to 1979, called "The post-war (political) consensus".
The price of the Lenton Sports £19/14- was more than double its 1939 price. In turn, a basic Raleigh single-speed bike cost £10 in 1947. My mother had a new £10 Raleigh bike purchased in Brighton, England for her to share with one of her sisters it was taken back to Scotland because a bike could not be purchased where she lived. My mum says it was hard to pedal the 7 miles to where she worked fruit picking.
At the time wealthy classes and the working classes had a bond of mutual support because a person from one class could be rescued from a bombed building by someone from another class. Men had been billeted together and talked about what they wanted after this war that they did not get after WW1. At the same time, the government did not want to make the mistake of the post WW1 where Germans and allies people suffered badly and Hitler rose out of that. Similar things were happening in Britain. The warnings King George V made after WW1 were ignored then but were heeded after WW2.
At the height of the war in 1943, greater restrictions were imposed. Gear hubs stopped being made and metals like chrome were reserved for military use. |
In reality, Winston Churchill may have given the people the NHS just the same as the Labour Government did. There were a lot of Conservative Doctors opposed to the NHS though so it is unlikely that a Conservative government would have brought in the NHS. It was an easier job for the Labour Government with mass popular support it had to make those changes at that time.
https://www.military-history.org/articles/5-key-reasons-churchill-lost-the-1945-general-election.htm
The Lenton sports MK II was made for just two years 1946 and 1947 although the Lenton sports bikes were made for two decades. Briefly, the world was not at war, USSR were allies and British soldiers were seconded to Palestine police in 1948 until new friends and enemies were found. Wars are manufactured to sell weapons and the methods remained bad. Rationing ended in 1954, in 1956 bread price control and the subsidy was lifted and in 1960 military conscription in the UK ended. In the 1970s it was stated that the UK would change to a post-manufacturing exporter of financial services. Since 1998 Sturmey-Archer stopped being British-owned making gear hubs and since 2012 Raleigh stopped being British-owned and making bikes in the UK.
Set the saddle height so that at the furthest stretch with the middle of your foot on the pedal your leg is almost straight. Apply pressure from the ball of your toes on the pedal. You start by kicking off, to bring yourself upright and going.
I will do more cleaning making the badge and pedals look better. |
Lenton the name of the bike might be connected to Lenton Priory, Nottingham which existed in the 12th-14th century. Raleigh and Sturmey-Archer were located at; Lenton Boulevard, Nottingham at the time of the bike's manufacture. Sturmey-Archer was a subsidiary of Raleigh at that time. Raleigh's 1930s Nottingham head office
Notice the knurled brake adjuster and lock nut. I have re-soldered two of the brake cable ends. Every nut and bolt including adjusting the saddle and handlebars moves as easily as a new bike although some of those parts have never been touched, greased or oiled in 40 to 70 years.
The metal grip pedals are good at preventing your shoes from slipping on the pedal even when it is wet, unlike rubber grip pedals. Move the pedal upwards to be ready to move off others wise it spins till it hits your shin but you soon learn to overcome that. Pushing your ankle into the pedal and moving the pedal upward seems to work.
Many patents were registered by Sturmey-Archer but not implemented. Interchangeability of replacement parts was important and this aspect was common in British manufacturing. Raleigh was a very conservative company but customers expected and imposed conservatism on the company, such as not taking up technical leading product development offered at times. This does mean though that the four-speed hub design is less optimal than it could be if the cable were pulled from the other side of the hub and there is a non-Sturmey-Archer modification to do that (reversing the order of the gears).
A perspective of a Raleigh shop steward whose career spanned the merger with Tube Investments in 1960 is that the company always had a "them and us" attitude. That view probably was held by the management as well. https://player.bfi.org.uk/free/film/watch-raleigh-fred-mitchell-1980-online There was a lot of repetitive work for workers at Raleigh but this is also true of many companies. I heard an anecdote of two workers in the car factory visualising a chessboard and playing chess exchanging moves at break time.
Homemade oil dispenser uses Biro ink tube. |
- British Standard Cycle (bikes and motorbikes) - Apparently Raleigh does not use these sizes.
- Whitworth.
- British Standard Whitworth - which uses smaller spanners.
- British Association (BA) - Some 2BA and 8BA are used on the hub-dynamo.
- American Fine (AF)
- Unified fine (UNF)
- Metric (M) is the width including the thread in millimetres but there are a regular pitch and a fine pitch thread alternative.
- Then screw the cap and bottom bracket back together finger tight, check the bottom bracket turns and check the tightness again.
- Loosen the ball cap 1/4 to 1/8 turn and tighten the ring nut with the c-spanner. With a wheel bearing similarly turn the shaft with your fingers and loosen the nut until there are no tight spots - the ball bearings wear oval and will pit the bearing shells if there are tight spots hence the tolerance 1/4 to 1/8 turn of slack. If there are still tight spots you need to replace the ball bearings but if the shells are pitted that is another problem and I have no experience with either issue.
- NOTE bearings on bikes are tightened more than this, no doubt for aesthetic reasons, it seems the nuts can be loosened by only 1/8 turn without causing the brake pads to rub. The bearing does not feel so wobbly compared with a correctly adjusted car wheel bearing consequently.
- Gear Hub bearings are set with less slack 1/16th turn on the drive side and 1/8th turn on the other side. I have read more slack elsewhere it may depend on the hub?
- The sprocket will wobble a little but that was unchanged after I opened the bottom bracket for the first time ever. The chain is in good order.
- Otherwise, assemble dry then oil normally (the small amount of grease will wash out in time and the extra friction is trivial anyway) - this is different from the correct advice because the bearings are oversized compared to a car and it is more important that everything is kept free of grit than everything be lubricated as it is assembled as you would do with an engine or gearbox.
Sturmey-Archer maintenance 1957
Hub Gears adjustment;
- Put the gear lever into second gear.
- Undo the barrel adjuster on the toggle chain until the hub goes into the no-gear position. Now turn the opposite way until the hub engages second gear again.
- At this point, turn the barrel another full circle and a half. Lock off the barrel.
- Put the hub into first gear. Ensure the gear lever will select first without the cable being very tight. You should be able to pull a tiny amount of the toggle chain out of the axle by hand.
- If you can't detect a little slack in Low (1), then turn the barrel back half a turn.
How Sturmey-Archer variable hub gears work;
From the Sturmey-Archer Story on the S5, five-speed hub - this S5 is very similar to the FW 4-speed hub. Notice that the Bottom gears name has changed to Super Low along with the new speed brought out Super High. (sturmey-archerheritage.com) |
- Normal gear - No power is not transferred through the gears.
- Low Gear & High Gear - use the same smaller sun pinion.
- Bottom – The smaller sun wheel pinions are de-clutched from the shaft and then the other larger sun pinion is clutched to the shaft. The relative speeds are low as well as the gears being lubricated with cycle oil makes this extra pinion also efficient. Their clutch mechanism is based on ball bearings that are pushed out of holes in the fixed shaft by the movement of the operating cable.
Three-speed epicyclic gear operation explained
This video is the clearest I have seen although I do not understand
German. The ball-bearing sun pinion clutch mechanism is not shown.
Mountain bike - If by sitting on a sprung bike your leg reach is shorted then peddling will become hard work consequently. I have also found as I was advised that the chain comes off easily or fouls up so it is a good idea to always carry a rag. The chain will stay on better if everything is kept clean and adjusted and that is my experience with the bike since doing that maintenance. The chain and sprockets are made of comparatively much thinner metal so they are sharp and cut my fingers.
The bike maintenance stand is necessary for dérailleur geared bike maintenance so that the chain hangs normally and the adjustments can be reached. Otherwise, turning any other bike upside down to work on it works fine. The stand is still useful for any bike and particularly a bike with drop handlebars.
Another comparison on Facebook was that the 1930s bicycle the other recently acquired is lighter to peddle than his superbike. All around a nicer bike to ride.
Some other comments say the old bike is better and in any case, all bikes before the 1970 or the later 1970s are much lighter to peddle because of their long wheelbase and the steel frame particularly if it is high tensile strength steel. Also, bikes made before the 1970s still had the oil port for thin oil on the wheel hubs. Although the bottom bracket was greased after 1961.
Change;
I mentioned hubs and bottom brackets changed from thin oil or grease to lubricated with grease. The S7 - 7 gear hub was introduced in 1973 with the no-slip between gears feature. This hub incorporated three epicyclic gear assemblies and the drive path was through a number of meshing gears. The non-slip feature was considered not to have merit previously but bikes with hub gears were being marketed to regular cyclists as easy, strong and reliable compared to dérailleur gears having become fashionable on sportbikes. The 7-speed gear hub of about 1997/2000 uses the mechanism of a third sun pinion and a third cog on each of the planet pinions to form what might have been efficient but by then grease was used in the bearings and there was no lubrication port in the hubs. 1973, S7 cable rotated a shaft operating cams rather than pulling a rod but the later seven-speed has low and high, super-low and super-high, and ultra-low and ultra-high gears by the selection of one of three sun pinions.
The advantage of having no slip-between speeds is obvious but the advantage of having a no-gear selected position if the cable is not set is that it makes the adjustment clear and unambiguous.
I have read in a Raleigh document that they would charge for re-magnetising a returned dynamo that had been let demagnetise. That is put a soft iron keeper with the magnet. That suggests that Raleigh might replace anything in exchange for the broken part that has not been broken by misuse.
https://www.sheldonbrown.com/sturmey-archer.html
kept clean). https://youtu.be/-9gQ1KRhesM
Ceramic speed - I can see that the gear teeth are slotting in on roller bearings not sliding up the tooth so there does not seem to be the velocity modulation that conventional tooth gears have. The velocity modulation in straight gears can make the wine. Presumably, the transmission is normally enclosed in order to keep it clean so thereby staying a low friction transmission in order to make the maker's claim meaningful? Lloyd's cross roller gear is as above but is single speed was patented in 1897, this was an expensive option offered by some bicycle makers including The Quadrant Cycle Co and some 1920s Rover bicycles.
The gear changing occurs by timing the slide of the pinion across the crown disk at an appropriate time. Hopefully, a cable-operated variant will be developed so that a cyclist won't become stuck with a flat battery?
If the change operation lifted the shaft and dropped then the gears could be changed at stationery.
There are many types of continuously variable transmission some of them require the cyclist to continue pedalling other gear changes can be carried out with the bike stationary or moving. The drive does not look to be as smooth as it could be or novel but the principle is clear in the video. Here is another but unfortunately it needs a battery Bicycle transmission (wavetransmission.com)
32mm wide tires pumped to high pressure are good sports, road and dry bike track tires. 40mm wide is a little better on grass and road. Tire friction is generally minimised by pumping the ties to high pressure but using slim tires is generally inconvenient and limiting.
Other Sturmey-Archer bike components and assemblies;
- Hub brakes were reckoned to be very good smooth, progressive and powerful. Some variants were operated by back-pedal others by cable and they could also include a gear hub.
- Hub dynamo was introduced in 1935 and is claimed not to add friction but a few people I've spoken to say that it does. The power taken is very little and no more than the power output of 2W used in the lamps. If pedalling at a reasonable pace puts in the same effort as walking then 50W of effort then 4% would be used which is more losses than N gear and similar to B gear (guess?).
- 1982 XAG 3W, 6V meeting new lighting standards and 4 times more efficient 30 poles, alloy dyno-hub sampled but not introduced. Then all dyno-hubs were withdrawn in 1984.
- During the 1980's permanent magnet motors became much more efficient requiring less copper. They used more powerful magnets. Also, much smaller air gaps were possible due to better engineering tolerance and bearings with very little play. Greater power density and efficiency were achieved provided those motors or generators did not drive directly but had flexible couplings.
- Basic generator theory determines that the output is a constant current but the voltage (with no load) is proportional to the speed of the wheel. That is; 300mA = 2W / 6V, With an old-fashioned series lighting circuit open lamp, fails all lights will go out but with a modern parallel lamp connection one lamp fails the other lamp will receive too much current. The ratings vary depending on the age of the bike. Blog Bicycle hub-dynamo maintenance - Includes suggestions and making a magnet keeper and re-magnetising a dynamo.
- Various lighting parts and battery units are to be used with the hub dynamo or Dyno-Gear-hub.
- Fixed wheel and back-pedal brake.
- Motorbike gears briefly. https://cybermotorcycle.com/gallery/norton-1930/Norton-1930-16H-500cc-Motomania-5.htm
- An internal combustion engine was briefly badged Sturmey-Archer.
- 1887 - 3 bikes a week made. The shop in Raleigh Street, Victoria was purchased and renamed the Raleigh Cycle Company.
- During the Victorian times, healthy living and exercise had become important, sanitation systems were built and excellence in bicycle making was surely part of that movement;
- https://www.innes-england.com/blog/former-nottingham-bike-hq-is-now-a-listed-building
- 1889 - a wealthy lawyer called Frank Bowden bought a controlling interest in a small Nottingham bicycle company called Woodhead, Angois & Ellis, renaming it the Raleigh Cycling Company.
- There is a little variation in the history.
- 1896 - 30,000 bikes were made this year.
- 1914 - Over 50-60,000 bikes were made that year. My Grandfather had a three-speed before WW1. Raleigh was the largest bicycle manufacturer in the world.
- 1939 - 400,000 bikes made a year.
- World War Two - 280,000 bikes were made a year.
- World War Two from 1943 - Bicycle hub manufacturing stopped until the end of the war and Sturmey-Archer published a leaflet advising people to keep their hubs maintained and have them repaired.
- 1951 - 1.1 million bikes made a year.
- 1960 - Raleigh merges with Tube Investments.
- The 1950s and 60s - After World War two, many people from all over the British Empire plus Polish and others who had fought in that war married and remained in the UK. Until WW2 most British people had not seen a black person but among the many US armed forces were blacks who also remained. Raleigh operated a policy of not employing black people at the instigation of the unions (I understand). The company reversed that policy and became a leading employer of black people;
- 1980 - 1.5 million bikes were made a year. Nearly as many as car sales.
1955 bikes were ridden 20 million KM/yr but during the 1970's the figure was only 4 million KM/yr and this amounted to only 20cm/year.
- 2000 - Sturmey-Archer - Government minister David Blunkett discusses rescue plan. Ultimately Sturmey-Archer is purchased by a private company and the machinery was sent to Taiwan.
- 2012 - Raleigh company leaves the UK.
- 2018 - Raleigh building is listed;
- N - gear is 1% and more efficient than dérailleur gear.
- AW 92.5-96% but dérailleur 92% 95%.S5, FW B 87%
- Losses 5-10% for both gear types. over a gear ratio range of +33 -25%
Tony Hadland blog supplement to the book.
The bike's transmission is all lubricated with 20 SAE oil but the 3-in-one brand turns out to be a very bad choice in the hub long term but okay everywhere else putting a protective coating on the paint and chrome. The drawing in the link further down this page below shows another type of oil port on the bottom bracket and hub. But there are different styles of oil ports such as the ones on this bike. It is a brass hole and the one in the bottom bracket also has a ball that needs to be pushed down with a special oil can. You can see further down the page that I have adapted an old oil can filler to form a funnel in order to make lubricating the hubs easier.
https://www.sheldonbrown.com/sturmey-archer/fw.html
Picture Right; the Polychromic green paint has mostly fallen off which is typical of the 1946 MK II Lenton Sports bike. The enamel undercoat is exposed with some light rust on most of the bike.
The original mudguards were cream in colour, made of cellulite and were brittle. These replacement Bluemels Lightweight mudguards have remained plastic and are much better. The mudguards look right but there was no reflector on these replacement mudguards. They were fitted in about 1970.
B bottom gear - cable is at its greatest tension.
Gears have been used in church clocks and windmills as early as 500AD. Making gears involved too much work to be developed anything other than very well-financed work but may not have been developed further than ideas drawn on paper. Only a tiny number of those ideas have survived such as those drawn by Archimedes, and novelty such as Hero's (steam) engine no doubt would not have had practical use and were not developed. The Chinese South-Pointing Chariot is based on a differential gear built in the 3rd century but could have been developed in the 27th century B.C.E. Drawings that looked like epicyclic gears, although no physical machine was intended, were carved into stone as Mayan calendar with a cycle of a little over 5,000 years.
In Britain metal was used for tools and weapons but machines were made of wood usually. British Kings in the 12th century were finding quests abroad and bringing back strange wonders, maths and astronomy to the British Isles. Tempering the swords very rarely got it right they chipped and shattered.
1418 Giovanni Fontana, is credited with building the first human-powered four-wheel land vehicle
Some bicycles began to manufacture in the 18th century, these were wooden and had no pedals. The first sketch known is much earlier drawn by Gian Giacomo Caprotti – a pupil of Leonardo da Vinci.
L low gear - hold the leaver between two fingers and move the leaver up and a lot of tension is released in the cable.
The spring tension is higher between B and L gears in these early versions of the four-speed hubs.
The crossbar quadrant gear selector remained available for a long time. The gear selector pictured was replaced by a new modern gear selector that was numbered (1, 2, 3, 4) and the numbers rotated and placed so it is readable with the selector mounted as it is on my bike. That was instead of named gears using the letters (B, L, N, H). The earliest type of selector was the barrel type with a lever that rotates in a barrel with notches fitted to the handlebars.
The British Empire had been formed in the 16th century and Britain started ruling the seas and thereby ruled most of the world. It may be said that India received fair rule of law in exchange for profit returned to the UK but the rulers became corrupt. A large class of wealthy British men, clergymen and sometimes women with an income developed many ideas that had no use until long after their death. One of those was Erasmus Darwin's Hydrogen and oxygen pumped to an expansion chamber rocket motor, which had no application until the 20th century. The 17th and 18th Centuries gave Britain steam power. Steam power improved greatly and gave us the power to build machines that powered the industrial revolution. The Newcomen Engine was used to pump water out of mines despite its inefficiency (0.5% versus 35% or higher for a modern steam turbine). This was the change that turned many centuries-old ideas or toys to entertain emperors and kings turned to practical use. The most modern steam trains reached 20% efficiency but diesel is more efficient and electricity is much more efficient and can take and return power to the rail grid in some cases.
History of bicycling in pictures Much engineering was developed by amateurs with a lot of leisure time and money. This is in addition to commercial or more often military research. All funding was from the exploitation of the world by the Empire nations.
In the cold about 30 years ago a spring broke in the gear selector but I only recently 2018 thought of a better fix. This time the fix worked. The bike was stored in a shed and deteriorated in that period but the wheels move more freely than any new or any other bike I have looked at. The front brake cable broke 40 years ago and I re-soldered it but not that well so I have replaced the cable in 2019.
The 19th Century marked the start of the unification of measurement and parts with Whitworth thread sizes. Metrication was proposed and started throughout the sciences although the Russian Rouble (PDF) had already been decimalised in the 16th century.
Britain is credited with the first automobile in 1801 but there seem to be others in the USA and one in Paris using the first Internal Combustion Engine although steam or electricity was used generally. Many types of bicycles were developed. 1896 The flash-boiler was patented this meant steam cars could go from turn-on after 90 seconds and then move silently and in a gentle way but the very fast steam cars such as Stanley Streamer and Doble that were also silent had no gears but took 10 minutes before the steam pressure was enough to go.
The first practical epicyclic gear hub was made by Scott and Phillot in 1878. At this time there were very many bike inventions patented but an American machinist Johnson made the first commercially successful epicyclic gear hub in 1895. Depending on what you read between 500 and 1,000 patients in the last two decades of the 19th century but another significant factor was that the quality of metals was going to improve greatly over the next two decades. The ideas were re-invented for thousands of years capability and the wealthy all came together to implement them.
William Reilly invented much more robust and cost-effective epicyclic hub variable gears some years after leaving the Hub and Two-speed gear Co, which later became owned by BSA. Reilly asked his fellow engineer James Archer to patent it in his name instead. William Reilly had signed a condition that bound him even after leaving that company 2-3 years earlier that was resolved when patents and cross-licensing were negotiated between BSA and Sturmey-Archer years later. But in Reilly's opinion, his invention was never fully attributed to him. The 1902 patent three-speed hub proved to be the lightweight, efficient, robust hub that Raleigh Bicycle company were looking for. They returned to the original design after making changes and mostly kept to that design but with improvements [pg 78].
William Reilly was employed at Sturmey-Archer and significantly ensured the process of tempering the hub gear parts was of a high standard. The components should bend and spring back but not crack. Gears made by car manufacturers at that time generally cracked and pieces break off. He seems to have been passed over, perhaps because of his demanding standards but tolerated when necessary but that is not recorded. I observe that people who do a job efficiently and very well are often not liked.
- Reference; The Sturmey-Archer Story, Tony Hadland (dedicated to William Reilly the unaccredited inventor of the modern bike epicyclic gears hub).
The bicycle chain was invented in 1880. These earliest chains were less robust until the type with a shaft slid inside a tube was developed. At first, each link pivoted on the two thin metal link points on each side {references to follow}. Modern chains also include a roller, and chains for dérailleur gears have more sideways movement.
Dérailleur gears were developed in 1905 but there was some form of dérailleur gear in 1899. This type of gear provides a close speed ratio but Sturmey-Archer did not provide it until the 1930s when there was an interest in close speed ratios. Dérailleur gears become fashionable in the 1970s. The mechanism is not protected so gets damaged, dirty needs adjustment and requires skill to use which probably is an attraction and why dérailleur gears became popular. Dérailleur gears are the cheap high maintenance option and hub gears are expensive and now have become even lower maintenance options (because they now don't need frequent oiling).
Sturmey-Archer used to make parts for hybrid hubs and dérailleur gears. The hub gear can be used to get you started from stationary so therefore a wide-ratio hub is most suitable? I have read elsewhere that close or medium-ratio hubs put back a little force in free-wheel onto the chain that may cause it to come off with dérailleur gears.
- The advantages are; Dérailleur close speed ratios, being able to start with the dérailleur at a high speed by selecting a low speed with the hub gear when stationary. Disadvantages of the vulnerable and slower gear change of the dérailleur and the dead weight of the hub gear.
- Lenton sports 1946/47 with hybrid hub and dérailleur gears;https://www.flickr.com/photos/cv-6enterprises/sets/72157632528362251/with/8383798141/
- Modern hybrid - this one is operated by wireless and is self-powered with a rechargeable battery; https://classified-cycling.cc/more/contact-partnership/
H high gear - the cable is slack and this is how the bike should be left when not ridden. If you pedal hard you can fly along at 30MPH+ Otherwise the bike rolls along with light peddling occasionally or braking to keep the speed down to 20MPH.
20th Century - from about 1910 cars with internal combustion engines had a starter motor fitted but required a lot of maintenance and perpetration first. Petrol cars were fun and had to be driven with skill and these were different from silent cycling, electric or a steam car. Meanwhile in France car manufacturers had not been stalled by the horse lobby as it had been in Britain and small 500cc, £600 cars. These cars were petrol, also steam and electric were being made.
Bikes were really developing fast with the lightest weight hub gears, frame and the lightest pedal bikes succeeded. Raleigh and Sturmey-Archer made the best for a very long time. At the beginning of the 20th Century, there were a number of excellent bikes and gears being made. BSA made a Sturmey-Archer gear hub under license but with ball races in the planet gears that hardly reduced the now very low friction anymore. Helical gears to reduce friction and gear wine did not seem to exist at all in British-made bikes and not in cars until after WW1? The Sturmey-Archer gear hubs use straight gears but the hub operates very quietly.
Picture right FW hub; By 1945 bikes had got to the ultimate with the FW gear hub. The oiling port on my bike is a simple brass hole but some bikes have an oil port with a spring cap. If you look through the hole the metal is bright silver and brass inside. The wheels moved easily after 25+ years unused in the shed and they moved back to their balanced position.
I am advised by Rob Lucky (Facebook) - "This is a 1950 and mostly original as I got it here in Canada it was likely sold by the Eaton's Department store that was a huge importer of Raleigh. Fenders still had Raleigh transfer and I switched to similar drop bars to what it would have had. It had an AW S/A but I got an FM as the upgrade was often. I attached the as found even had the front Raleigh hub knock-offs. Whatever you can do to promote these bikes is great."
The paint on this Canadian bike is in better condition than the paint on my bike. The paint on my bike has mostly fallen off.
Left the 1950 Lenton sports bike after restoration note Lenton Sports decoration 3D text on the saddle tube section is the same as my bike. The bottom bracket to the steering tubing is different my bike is ALL STEEL in red 3D. The main decoration on the tube from the bottom bracket to the saddle is very similar but different, I think, the lettering size has been corrected and the outline is not gold.
Although oiling the bike is quick and easy if you do not clean the grime it attracts then you will get dirty black stains on anything that touches it. The big drawback with modern bikes is how heavy they can be to pedal in order to make adult bikes easy to learn to ride. Using greased bearings instead of light oil transmission has added very little friction. This happened;
- The bottom bracket in 1961(USA Facebook) and the front hub after 1960 (this part of the Raleigh history and Tube Investments merger with Raleigh in 1960 is not well documented).
- At some point, the viscosity of the oil recommended increased to 30AE - I understand. It is better to use thinner oil than risk parts within the hub not operating correctly. Oil is often discussed in social media but bear in mind that oil for outdoor general use is what is recommended by bike makers but is not recommended by people who use and maintained a lot of old bikes.
- 3-in-one oil is a good oil but it should not be used in a gear hub. After 20 or 30 years it will have coated things like black paint and stop the hub gear selection from working properly. The tin used to have a picture of a bicycle on it in the 1960s and it is okay for anything else protecting chains, house and shed hinges coating what is used on black. The black residue from using 3-in-one oil up until 50 years ago was all over the bike and seems to need a chisel and a wire brush to remove it but it protected the steel and the paint underneath.
- By comparison, modern engine or gearbox oils have micro-beads that help the oils adhere to the surfaces and I guess you do not need to or probably should not oil the bike so often consequently. 10W40 engine oil is a thin oil but it is thicker than bicycle oil I am advised is okay. Hair clipper oil is probably the most suitable but I have not used this oil but any of the bicycle oils should be suitable.
- The Sturmey-Archer gear hubs stopped fitting with oil ports from 1991/2 (Facebook). Modern bikes with grease used in the transmission are consequently hard to pedal.
The modification of a 4-speed FW to a five-speed hub.
https://hadland.wordpress.com/2020/04/19/converting-the-sturmey-archer-fw-4-speed-hub-into-a-5-speed/?fbclid=IwAR1usc98KHQMs8g1R5Ael03qzrprN_3XTpxguSUkskwAmODOWlu1haC0wU0
A critical and found review of Sturmey-Archer's management. Interesting lightly oiled SA is more efficient than a dérailleur as measured in 2000.
https://hadland.wordpress.com/2012/07/02/elegy-for-sturmey-archer/?fbclid=IwAR05tk_MQhQ8JHUmUQDUuqOMQpjH4Z2sfjHErcnfr0hZ4XDQ9ZTD0Mnc1OY
Lots of old bike-related pictures
http://www.oldbike.eu/museum
https://www.veloduo.co.uk
Bike discussion forum.
http://www.retrobike.co.uk
Catalogue pages of bikes around 1939 to 1950 including the Lenton Sports.
https://on-the-drops.blogspot.com/2016/12/the-clubmans-1946-1951.html
Supplier of old bike transfers.
https://h-lloyd-cycles.myshopify.com/collections/raleigh
https://h-lloyd-cycles.myshopify.com/
Pictures of another Lenton Sport
http://s47.photobucket.com/user/supergymnast/library/1945%20Raleigh%20Lenton?sort=3&page=1
Archive of Sturmey-Archer catalogue pages and technical data.
http://www.sturmey-archerheritage.com/index.php?page=history-detail&id=176
Reg Harris OBE Cyclist trains on a Lenton sports bicycle with an FM hub;
https://on-the-drops.blogspot.com/2016/12/the-raleigh-lentons-1948-1960.html
Archive of Veteran bicycles catalogue pages and technical data.
http://veterancycleclublibrary.org.uk/library/
When were bicycle gears invented - Guardian Newspaper.
https://www.bikeradar.com/gear/article/when-were-bicycle-gears-invented-35989/
Drive train history - Velo News.
https://www.velonews.com/the-drivetrain-wars
YMCA, Recycle - Bike project;
https://westkentymca.org.uk/our-work/recycle-bike-project/
Bike catalogue pages;
https://on-the-drops.blogspot.com/2016/12/the-raleigh-lentons-1948-1960.html
Lenton sports Ladies' sports bike was first introduced in 1940, Model 44. Then the MKII in 1946 bike but the first with Reynolds 531 Steel frame bikes were introduced in 1936 as aircraft steel frame I understand, but before that molybdenum steel was used on sports bikes weighing a little more at 15.5Kg. https://on-the-drops.blogspot.com/2016/12/the-clubmans-1946-1951.html
1943 We are making no more gear hubs until the end of the war
http://www.sturmey-archerheritage.com/index.php?page=history-detail&id=744
http://www.sturmey-archerheritage.com/index.php?page=history-detail&id=978
Three and four-speed hubs 1947.
http://www.sturmey-archerheritage.com/index.php?page=history-detail&id=227
http://www.sturmey-archerheritage.com/files/view-1369.pdf?fbclid=IwAR2vjBRMwkHM_DeDKr0U6_ZQoueXTPgFMcXrILVd_1yYxH1g1pUW7MMsMpY
About some of the comments I have made in the text;
- S-A Sprinter S7, 1997-2000 has a single ring gear, single epicyclic cage, each planet gear is a single 3 cog component, 3 sun gears. Give 3 speeds + 2 more super-wide speeds + 2 more ultra-wide speeds.
- 1966, S5 two cable hub launched. Note Tony Hadland's book draws attention to the point that the single cable version was not launched until the 1980s but I add that old patents such as the 1921 Henry Sturmey's patent on the single cable 5-speed hub may have still been active or recently expired. I have read that patents used to be granted with a life of 40 years before WW2.
- Selectors and hubs and some other parts are often made under license by different makers and are mostly interchangeable with British-made versions of Sturmey-Archer. The important point is that parts made since Sturmey-Archer closed in the UK and relocated to Taiwan are very unlikely to be interchangeable with parts made in the UK over the previous century. I say most but not all Sturmey-Archer gear selectors can be used with all Sturmey-Archer hubs.
The postwar period was exciting with the finest quality made for the people, up to a point just the white English. The deferred Olympics were to be held in London in 1948 and the Festival of Britain in 1951. The lovely 1946 Lenton Sports bike with its modern golden serrated shield.
- Up to 1945 --- Feature of the bike frame was a gold line stencilled on some of the tube sections. Decorations were more curls and swirls influenced by William Morris.
- Right; MK II, 1946-1947 --- Looks like a serrated shield with a gold stencil outline on mustard yellow with deep blue shadow and green text. This decoration is also on some Lenton MK III made prior to the 1948 London Olympics.
- The 1948 London Olympics had been postponed from 1939 due to war.
- There are a number of other decorations in around 1949 Lenton Clubman (the successor to the Lenton Sports) and the 1950's Reg Harris Lenton is an Olympic torch with a red flame. There is a very similar decoration to the one pictured right used on the later Lenton sports but without the gold outline.
LENTON SPORTS
- Above; MK III from 1950 --- Clean plain italic text. But there were many more different decorations.
- The Highway Code advises cyclists to stop at the left-hand side before turning left-right or going straight on. But you need to judge the traffic and the situation. A junction near me had the drain hole fitted the wrong way so that a narrow-width tire wheel could jam between the grating. What was particularly bad in this case was that cars were parked so the problem could not be seen in advance.
- Learn to get on and move off with your left or right sides and feet. A step-thru bike is easier to get on and off but they are a bit heavier which does not matter. A full-size bike will ride the potholes better but the vibration on a regular bike is harsher, and road holding is poorer than with a sportbike. So don't be shy if you are a bloke about riding one.
- High visibility is important. Wearing a silly hat is okay if it gets you noticed but helmets do encourage you to go faster because they give a false sense of safety. Helmets are not required for the cyclist but they do change the type of injury you might get in a fall or crash.
- The low-down kerb light on old bikes is very useful if you have to cycle in the dark.
- Wearing a cloth cap - offers no physical protection but the cyclist will have a slow careful gentle pace outlook in mind. Anyway, if he could not cycle fast the hat would not blow off.
It is notable that people seem much more tolerant and courteous of cyclists. Cycle lanes, cycling on the pavement and on-road is mostly done with a lot of care on all sides.
Having a liking for well-made machines does not get many new machines sold but it does create interesting and useful work for the spares and repair industry. More importantly, making well-made and maintaining things empowers people but buying new things with a short design and non-repairable life reinforces helplessness.
I have been rubbing the Lenton Sports down with linseed oil and doing that has improved all surfaces, enhanced the decoration and given the heron badge a lovely tarnished brass lustre. The Ever Ready lamp rattles it always did, so I put some rubber inner tube over the hook, and in the battery compartment that has helped. I do not have the original green tin lamp. I have adapted a modern head wearable lamp to light the curb edge and fitted a flashing red lamp to the rear rack.
The front tire is new but worryingly it has much less tread than the old war-grade tandem tire I was using last year (2018). It has been suggested to me that the tread on a bicycle is not important because the tire is round in section so naturally pushes water away compared with a motorbike or car tire is flat and reinforced by a steel band so tends to trap water if there were little tire tread.
angle so the polychromic green frame colour and gold outline stylised Olympic torch can be seen.
Bicycle dynamo blog page
Pandemic cycling and bicycle selection Blog page