The bwr hub used in the sixspeed bromptons is also a three speed hub gear made by sturmey archer, so i thought i would show how the bwr compares to the pictures i took of the 1976 aw hub for the aforementioned post. Long gone are the days when the commuter bike was an oldschool mountain bike with a potpourri of parts and a rear wheel that was only roughly true. Upgrades with new parts can be unpredictable, but our conversion worked perfectly, and yours should too. The current brompton has a 3speed sachs hub, 54t chainring and 12t i think sprocket. Quick visual guide to basic brompton maintenance 12 step 4. For those new to bromptons, the six speeds are achieved using a 3speed hub gear in combination with two sprockets cogs. Touring brompton maintenance lets begin by saying that even the most reliable bikes are subject to wear and tear during a tour and any part has the potential to fail and stop you on the road. Brompton 3speed hub internals cyclechat cycling forum. I have a muji utility bicycle with a 3speed internal gear hub which i got second hand around 5 years ago.
This guide was put together based on knowledge acquired in technical workshops, personal research and experience for the purpose of sharing some brompton maintenance tips with brompton owners. Sprockets hub gear sprockets transmission sjs cycles. The lbs which i bought the bike from has since closed down and i havent managed to find another bike shop which does maintenance on this kind of bike the last one i visited just told me if my bike broke down i should get a new one. It has been commonly used in the good old english bicycles. But is completely normal and soundless when gear is in low. This short video explains how to adjust your brompton hub gears easily for best performance. Brompton bicycle is a british manufacturer of folding bicycles based in greenford, london the brompton folding bicycle and accessories are the companys core product, noted for its selfsupporting compact size when stored. When spraying the drivetrain ensure you do not get the cleaner onto other parts of the bike. Although the sixspeed bwr brompton wide range hub system is wellsuited to climbing hills, the fluidity of the shifting was challenging, as the sturmeyarcher internal hubs wide range requires a twospeed derailleur to get the even gear spacing. As i have kept the schlumpf mountain drive from my old brompton, i have no need of any lower gears. The sturmey archer hub is working fine, but the chain isnt going from the small sprocket to the large sprocket when i shift using the left hand gear lever. Brompton 3 speed hub gear shifter for sram or sturmey.
A range of brompton accessories from rutland cycling. A robust 3 speed hub gear meaning way less maintenance paired with the classic m type handlebar makes this bike unstoppable. With careful adjustment and maintenance, the revamped sturmey hub should last for many years and revitalise a tired brompton. Brompton hub gear shifter with integrated brake lever rhs. Brompton bikes folding bicycles folding bikes edinburgh. Brompton electric dealer will check for software updates and run diagnostics on the bike to.
Gear inches of brompton with single speed, 2 speeds, 3. You need a 4mm allen key and a posidrive screwdriver. We offer our friendly bike repair service by appointment only from tuesday through. A brompton b75 is a perfect introduction to city cycling. The chain, chainring and sprockets will need cleaning to remove any accumulated dirt and lubricant, before a fresh application of chain lubricant. It has no problem moving from the large sprocket to the small sprocket upshifting. Brompton sturmey archer internal gear hub maintenance. Brompton hub gear setup sturmey archer 3 or 6 speed. Bicyclists tend to be conservative and want to reduce the number of moving parts and thus breakage points to a minimum. Mainly oriented at flatter riding conditions, two gears allow for a slightly lower gear range for the occasional low hill. Move the gear triggers up to high gear and, in order to engage the high gear s, move the pedals forward and backwards. From tiparts workshop, brompfication and nov design to chris king.
The single speed brompton is the most affordable, lightest and least maintenanceintensive option available. This guide to the best commuter bikes of 2018 provides 10 awesome bikes to get you to and from work and also offers tips and advice to know before you buy. A first look at bromptons 2017 underbar shifters clever. Three speed, five speed and six speed brompton bikes use a hub gear rear wheel. Friendly bike repair shop youll love london bicycle cafe. Brompton axle fixings nuts and bolts, hub gear internals and hubs. Brompton brompton accessories gear parts and cables. Safety the brompton is designed for use on roads and wellmade paths, carrying a maximum load not exceeding 110kg rider and luggage weight included. Also oil the cables especially, drip a little oil into the upturned end of the brake cable where it goes into the brakes at the front and back. I am still using the original chain, and sprockets front and rear. Oct 06, 20 quick visual guide to basic brompton maintenance 11 section 1. A brompton is not intended for stunts, crosscountry riding or extreme sports. Other bike manufacturers migrated to the similar sram 5speed, but the brompton frame is unusually narrow, and it was not until may 2002 that the company came up. To go up and down the gears one by one, you use the shifters alternately.
The 3speed sram hub gear as fitted to all bikes from 2001 onwards is very easy to adjust. Use our bike builder to create your own fold up bike. A simple spec, ready to go, with all the benefits of the brompton fold. Three speed uses internal hub gearing, provided by sturmey archer and previously also sramsachs. Brompton gearing modifications brompton electric bike shop.
The axle and toggle chain will impact the quality of the. Brompton alloy, 170mm to the average cyclist, the brompton might seem small and weird. Quick visual guide to basic brompton maintenance 51 section 5. To be honest, i never think about it, i just keep going and have never carried out any maintenance at all. We have a fully equipped open plan workshop and plenty of customer parking.
The gears on the 3gear shifter are impossible to switch. Servicing brompton internal gear hub bwrsrf3 cyclelogy. They add a little weight but give an incredibly long service life in. Till now the sa 3speed hub design remains mostly similar. If you are unloaded then the lowest gear will do most hills.
Brompton axle parts, hubs, gear internals brilliant bikes. Brompton has addressed this issue decisively among other 2017 revisions, now beginning to arrive at dealers. We want you to be 100% satisfied with your shopping experience at rutland cycling, so we offer a 90day. Brompton compton cycles, london brompton folding bikes. Brompton uses a range of gears that are best suited to the multipurpose functionality of the bike and the wide range of riders that use a brompton bicycle.
Your brompton dealer will be able to recommend a degreaser or chain cleaning detergent to use. If you are concerned you might look for the reduced gearing option on the brompton you can also retrofit it but its more costly than as a factory option to give you a lower gear on the hills at the price of a lower top gear. So i first proceeded to measure almost every component of my new brompton. Brompton bikes are the best foldable bicycles for commuters. Brompton gearing pitching it right for you brompton geek. Brompton hub gears parts and cables brilliant bikes. Its so well thought out, and well made, it carries everything you need for basic repair and maintenance, and it fits so lovely into the main frame. This is in part to make up with the wide spacing of the 3speed internal gear hub. That being said, brompton 6speed bikes combine a 3speed internal gear with a 2speed rear miniderailleur. We thoroughly test all the products we sell to make sure they are up to the high standards we expect for brompton. If you dont know the brompton, the 6speed version has a sachs 3 speed hub to which a pair of sprockets is attached.
Brompton accessories gear parts and cables pedal cycles. Im planning a new brompton purchase and most of the decisions about spec are already made but one thing i cant decide on is gearing. Gear inches of brompton with single speed, 2 speeds, 3 speeds and 6 speeds. It is a friendly guide by a bunch of brompton fans. We are one of the largest stockists of whyte and scott bikes in the area and the largest brompton dealership in dorset with four brompton demo bikes available. This is to ensure 1 that the gear cable tension at the rear hub is at the minimum to allow it to be. Having given up hope of getting my brompton t5 gears fixed, i decided to upgrade to a new six speed version. In fact, the transition between schlumpf top and brompton bottom is perfect, but i find the brompton derailleur. The left hand shifter selects the sprocket and the right hand one the internal gear. Aug 02, 2017 brompton sturmey archer internal gear hub maintenance silverius sanpo. Dual pivot brakes protrude less than, say, vbrakes so thats what brompton spec. Adjustment of gear transmission hub gear transmission needs to be adjusted after the rear wheel has been removed or when there are problems with the gear transmission e.
Step one set the 3speed shifter to the second gear. For a hub gear, the control has to be disconnected. On bikes with a hub gear, the indicator gear should be. Feasibility of coupling internal hub gear and derailleur. Before using your brompton, please read this manual noting the sections on safety. May 22, 20 the bwr hub used in the sixspeed bromptons is also a three speed hub gear made by sturmey archer, so i thought i would show how the bwr compares to the pictures i took of the 1976 aw hub for the aforementioned post. The planet cage differs significantly between the old aw hub and the bwr. Ive had my brompton for about 8 months and the more i use the bike the more difficult it gets to switch gears on the bike. Cleaning and lubricating a brompton folding bicycle chain. Drawing shows the construction of an early sa 3speed hub. Here im interested in the 6speed models which, after all, give you the most gears you can buy on a brompton.
When riding a brompton, i used to carry just a sawed off 15 mm wrench aka homemade tire lever, a set of tube patches and a micropump. I have a 3 speed brompton and ride that route without any problems. The purchase of my latest p3l became an incentive to optimize my takealong tool kit. Like most cycling tourists, i am not an experienced mechanic and in a dozens tours with different type of bikes i have so far completed, i mostly had to. The chain should be regularly cleaned and lubricated. Keep in mind that the gear range on a brompton will feel a little different as compared to the range of road bikes. Removing and installation of the rear wheel the wheel needs to be removed to change the tire, inner tube or simply to facilitate more a thorough cleaning of the bike e.
We recommend cleaning the chain first with a bicyclespecific degreaser and cloth. Brompton parts by brand components perennial cycle. Inside the brompton wide range bwr hub chester cycling. Fitting a replacement derailleur cable as a result of changes to the brompton, different cables are required for different models. Oct 22, 2016 my issue on the noise when gear is shifted to middle or high gear. Touring brompton maintenance the brompton traveler. Technical information about sturmeyarcher 3speed internalgear hubs. Brompton uses mainly the brompton wide range bwr or 3speed freewheel rear hub srf3, which are manufactured by strumey archer. The planet cage differs significantly between the old aw hub. We offer several different gear options and dealers will make recommendations depending on your specific riding conditions. Affordable folding bike the brompton b75 finance available. Brompton uses mainly the brompton wide range bwr or 3speed freewheel rear hub srf3, which are m.
Internal gear hubs are a wellproven design and are simple to use, adjust and maintain. Longterm readers may recall that the bankruptcy of hub gear manufacturer sturmey archer in the summer of 2000 left brompton short of a suitable 5speed hub. Ive followed brompton s technical guide for 2 speed gear. Unscrew the gear cable barrel from the gear chain rod to disconnect the gear cable from the hub. These bikes can be shipped to the store within a week, depending on your location. We want you to be 100% satisfied with your shopping experience at rutland cycling, so we offer a 90day exchange or refund on any unused item within the uk. It wouldnt have been necessary if you had a 7 or 9speed shimano or 14speed rohloff, but the brompton has a very narrow rear frame and only a custom 3. Brompton sturmey archer internal gear hub maintenance duration. As a result of changes to the brompton, different cables are required for different models. Brompton bolt through axle fasteners for the brompton dynamo hubs and extra light front hub. This works with 3 speed sturmey archer and sram internal hub gears.
I suppose the chain has an easier life because it isnt constantly climbing over an array of different size sprockets. The advantage about having an internal gear hub is that all moving parts are sealed inside the hub shell, keeping the entire mechanism safe from corrosion and damage from external elements. My brompton l3 has become a 2speed, i can no longer adjust the cable tension in such a way that all 3 gears are usable. All available models of the folding bicycle are based on the same hinged bicy. As with the hub bearings, its a good idea to reset the adjuster after a few rides. Brompton also offer 2speed, 3speed or 6speed gearing options which use either a simple 2speed derailleur or a 3speed hub gear or or a combination of both which all comply with their 112mm dropouts. The brompton doesnt need much in the way of maintenance the sealed hub gears and galvanised chain make the gearing very durable. Its tessera system is the marketleading processing solution for led video walls, used in highprofile events ranging from the academy awards oscars to tours by acts like ed sheeran, u2, roger waters and metallica. A singlespeed hub fits these 112mm dropouts perfectly. Alternatively, you can build a custom bike for delivery within two months. Ive followed brompton s technical guide for 2 speed gear adjustment.
Step two looking through the chain tension nut hole in the rear axle you will see a toggle chain. If you like brompton bikes, you probably already know of brompton s own multitool. If you have not had the brompton demonstrated or explained to you, read this section before trying to unfold or fold the bike. Brompton sturmey archer internal gear hub maintenance youtube.
Mar 16, 2011 i have the alfine 8 speed hub gear on my pro connect. For a hub gear, the control cable has to be disconnected. Here we list all of the controls needed for the hub gears, from triggers shifters, to gear cables and indicator chains. The new shifters follow current fashion of being below the bars, offer a very clean modern appearance with function labeled, dont rattle at all, and are a little lighter and more space efficient than what they replace. Everythting you could ever need to tune or modify your brompton bike to make it truly unique. Brompton gear spare parts and accessories brilliant bikes. Bromptons therefore ride superbly, are safe, agile and fast, yet fold easily and quickly into a highlycompact and portable package. Brompton technology creates powerful led video processing products for the live events and entertainment industries.
Rohloff brompton kit it took some figuring out, but ive got a rohloff 14speed hub gear conversion working happily on the brompton the gear range with t rear cog and 54t front chainring both completely standard is 19 to 102 1. Unscrew the gear chain rod from the rear hub and set aside for cleaning later. Quick visual guide to basic brompton maintenance slideshare. So bromptons come with a choice of gearing options.
They add a little weight but give an incredibly long service life in normal use. Dec 14, 2015 the brompton doesnt need much in the way of maintenance the sealed hub gears and galvanised chain make the gearing very durable. In the us you can purchase a brompton from your local brompton retailer, they will have bikes instore and access to a carefully curated range of bikes ready for the us market. Your brompton should be used for its intended purpose. Now, lets check out the gear inches and meters traveled the distance the bicycle travels for one crank. Please contact your sturmeyarcher dealer who is equipped. Hub gear maintenance pedelecs electric bike community. If you have used a brompton before, part 3 may still be a useful source of tips.
If you opt for doing it yourself, find your hub model and follow your maintenance manual if its a shimano nexus inter3 hub the maintenance should be similar to the 7speed, explained in the dealers manual link above. Brompton folding bikes have a fullsized frame, made mainly of steel for strength and stiffness. Apr 18, 2015 strumey archer sa gear hubs dates back to the early 1900s. The hub will be available from january 2009 but brompton are taking orders before this. The brompton 3 speed shifter for sa or sram is a genuine brompton replacement part. Saddle bags bottle cages child seats childrens bike accessories cycle computersgps lights locks maintenance cleaners and degreasers maintenance cleaning maintenance. Brompton 2 speed axle fittings for the single two speed rear wheel includes chain tensioner nut and washer. Alvin wong has produced a quick visual guide to basic brompton maintenance. The most comprehensive range of quality cycle components, spares and accessories in the world with global delivery. During a major service, the hub greases should be replenished or replaced especially for transmission parts of internal hub.
1669 700 960 1083 444 427 1200 630 978 1323 832 1414 1248 207 393 537 119 688 819 1354 941 1625 877 1137 1119 1041 1268 433 588 755 1056 827 445 685 64 613 182 1118 855 80 811 740 627 1112 127 415 197 1231