Unscrew the gear cable barrel from the gear chain rod to disconnect the gear cable from the hub. 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. Brompton hub gear shifter with integrated brake lever rhs. A range of brompton accessories from rutland cycling.
So i first proceeded to measure almost every component of my new brompton. Cleaning and lubricating a brompton folding bicycle chain. A brompton b75 is a perfect introduction to city cycling. 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. We want you to be 100% satisfied with your shopping experience at rutland cycling, so we offer a 90day.
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. Bicyclists tend to be conservative and want to reduce the number of moving parts and thus breakage points to a minimum. Brompton sturmey archer internal gear hub maintenance. Gear inches of brompton with single speed, 2 speeds, 3. Aug 02, 2017 brompton sturmey archer internal gear hub maintenance silverius sanpo. Apr 18, 2015 strumey archer sa gear hubs dates back to the early 1900s. Brompton hub gears parts and cables brilliant bikes. Brompton bikes folding bicycles folding bikes edinburgh. We offer several different gear options and dealers will make recommendations depending on your specific riding conditions. Please contact your sturmeyarcher dealer who is equipped. 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. All available models of the folding bicycle are based on the same hinged bicy. Touring brompton maintenance the brompton traveler.
Gear inches of brompton with single speed, 2 speeds, 3 speeds and 6 speeds. I have a muji utility bicycle with a 3speed internal gear hub which i got second hand around 5 years ago. Hub gear maintenance pedelecs electric bike community. The single speed brompton is the most affordable, lightest and least maintenanceintensive option available. Drawing shows the construction of an early sa 3speed hub. It is geared similarly to a singlespeed urban bike, so it is relatively easy to start from a dead stop, and capable of decent cruising speed. Brompton axle fixings nuts and bolts, hub gear internals and hubs. But is completely normal and soundless when gear is in low. Having given up hope of getting my brompton t5 gears fixed, i decided to upgrade to a new six speed version. Saddle bags bottle cages child seats childrens bike accessories cycle computersgps lights locks maintenance cleaners and degreasers maintenance cleaning maintenance.
Safety the brompton is designed for use on roads and wellmade paths, carrying a maximum load not exceeding 110kg rider and luggage weight included. The planet cage differs significantly between the old aw hub. 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. The 3speed sram hub gear as fitted to all bikes from 2001 onwards is very easy to adjust. We thoroughly test all the products we sell to make sure they are up to the high standards we expect for brompton. We recommend cleaning the chain first with a bicyclespecific degreaser and cloth. It has no problem moving from the large sprocket to the small sprocket upshifting. Quick visual guide to basic brompton maintenance 12 step 4. A first look at bromptons 2017 underbar shifters clever. The 8speed brompton chainset and tensioner installed. A robust 3 speed hub gear meaning way less maintenance paired with the classic m type handlebar makes this bike unstoppable. Upgrades with new parts can be unpredictable, but our conversion worked perfectly, and yours should too. Fitting a replacement derailleur cable as a result of changes to the brompton, different cables are required for different models. This is to ensure 1 that the gear cable tension at the rear hub is at the minimum to allow it to be.
Brompton hub gear setup sturmey archer 3 or 6 speed. As a result of changes to the brompton, different cables are required for different models. It has been commonly used in the good old english bicycles. The axle and toggle chain will impact the quality of the. If you have used a brompton before, part 3 may still be a useful source of tips. Internal gear hubs are a wellproven design and are simple to use, adjust and maintain. This short video explains how to adjust your brompton hub gears easily for best performance. I have a 3 speed brompton and ride that route without any problems. We offer our friendly bike repair service by appointment only from tuesday through. This works with 3 speed sturmey archer and sram internal hub gears. 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. 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. Brompton bikes are the best foldable bicycles for commuters.
When spraying the drivetrain ensure you do not get the cleaner onto other parts of the bike. Brompton uses mainly the brompton wide range bwr or 3speed freewheel rear hub srf3, which are m. 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. The gears on the 3gear shifter are impossible to switch. 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. Bromptons therefore ride superbly, are safe, agile and fast, yet fold easily and quickly into a highlycompact and portable package. Brompton electric dealer will check for software updates and run diagnostics on the bike to. The chain, chainring and sprockets will need cleaning to remove any accumulated dirt and lubricant, before a fresh application of chain lubricant. Brompton bolt through axle fasteners for the brompton dynamo hubs and extra light front hub. Dual pivot brakes protrude less than, say, vbrakes so thats what brompton spec. You need a 4mm allen key and a posidrive screwdriver. Technical information about sturmeyarcher 3speed internalgear hubs. Feasibility of coupling internal hub gear and derailleur. 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.
Brompton uses mainly the brompton wide range bwr or 3speed freewheel rear hub srf3, which are manufactured by strumey archer. A singlespeed hub fits these 112mm dropouts perfectly. 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 axle parts, hubs, gear internals brilliant bikes. Quick visual guide to basic brompton maintenance slideshare. Brompton compton cycles, london brompton folding bikes. 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. 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. With careful adjustment and maintenance, the revamped sturmey hub should last for many years and revitalise a tired brompton. Brompton gear spare parts and accessories brilliant bikes. 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. 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 gearing pitching it right for you brompton geek. For those new to bromptons, the six speeds are achieved using a 3speed hub gear in combination with two sprockets cogs. A simple spec, ready to go, with all the benefits of the brompton fold. Step one set the 3speed shifter to the second gear.
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. Brompton folding bikes have a fullsized frame, made mainly of steel for strength and stiffness. Quick visual guide to basic brompton maintenance 51 section 5. 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. A brompton is not intended for stunts, crosscountry riding or extreme sports. Step two looking through the chain tension nut hole in the rear axle you will see a toggle chain. Everythting you could ever need to tune or modify your brompton bike to make it truly unique. Friendly bike repair shop youll love london bicycle cafe.
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. 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. Brompton accessories gear parts and cables pedal cycles. It is a friendly guide by a bunch of brompton fans. Mar 16, 2011 i have the alfine 8 speed hub gear on my pro connect. The brompton 3 speed shifter for sa or sram is a genuine brompton replacement part.
Before using your brompton, please read this manual noting the sections on safety. 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. Your brompton should be used for its intended purpose. The brompton doesnt need much in the way of maintenance the sealed hub gears and galvanised chain make the gearing very durable. So bromptons come with a choice of gearing options. Three speed uses internal hub gearing, provided by sturmey archer and previously also sramsachs. Brompton alloy, 170mm to the average cyclist, the brompton might seem small and weird.
Oct 22, 2016 my issue on the noise when gear is shifted to middle or high gear. 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. Here we list all of the controls needed for the hub gears, from triggers shifters, to gear cables and indicator chains. Your brompton dealer will be able to recommend a degreaser or chain cleaning detergent to use.
These bikes can be shipped to the store within a week, depending on your location. Unscrew the gear chain rod from the rear hub and set aside for cleaning later. Brompton technology creates powerful led video processing products for the live events and entertainment industries. I suppose the chain has an easier life because it isnt constantly climbing over an array of different size sprockets.
As with the hub bearings, its a good idea to reset the adjuster after a few rides. If you dont know the brompton, the 6speed version has a sachs 3 speed hub to which a pair of sprockets is attached. If you have not had the brompton demonstrated or explained to you, read this section before trying to unfold or fold the bike. Till now the sa 3speed hub design remains mostly similar. The hub will be available from january 2009 but brompton are taking orders before this. Brompton brompton accessories gear parts and cables. Brompton has addressed this issue decisively among other 2017 revisions, now beginning to arrive at dealers. 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. They add a little weight but give an incredibly long service life in. 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. We have a fully equipped open plan workshop and plenty of customer parking. Affordable folding bike the brompton b75 finance available. In fact, the transition between schlumpf top and brompton bottom is perfect, but i find the brompton derailleur.
Use our bike builder to create your own fold up bike. 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. The planet cage differs significantly between the old aw hub and the bwr. To be honest, i never think about it, i just keep going and have never carried out any maintenance at all. This is in part to make up with the wide spacing of the 3speed internal gear hub. During a major service, the hub greases should be replenished or replaced especially for transmission parts of internal hub. Single speed you wont need any gear cables as you dont have any gears. 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.
Servicing brompton internal gear hub bwrsrf3 cyclelogy. For a hub gear, the control cable has to be disconnected. As i have kept the schlumpf mountain drive from my old brompton, i have no need of any lower gears. An ebook reader can be a software application for use on a computer such as. 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. They add a little weight but give an incredibly long service life in normal use. The most comprehensive range of quality cycle components, spares and accessories in the world with global delivery. Brompton parts by brand components perennial cycle. Alternatively, you can build a custom bike for delivery within two months. If you like brompton bikes, you probably already know of brompton s own multitool. Brompton gearing modifications brompton electric bike shop. Ive followed brompton s technical guide for 2 speed gear adjustment.
Now, lets check out the gear inches and meters traveled the distance the bicycle travels for one crank. If you are unloaded then the lowest gear will do most hills. Alvin wong has produced a quick visual guide to basic brompton maintenance. The current brompton has a 3speed sachs hub, 54t chainring and 12t i think sprocket. Brompton sturmey archer internal gear hub maintenance duration.
So if you dont like the awkward gear shift and just want three speed, then just undo the rear gear cable. For a hub gear, the control has to be disconnected. Mainly oriented at flatter riding conditions, two gears allow for a slightly lower gear range for the occasional low hill. Brompton 2 speed axle fittings for the single two speed rear wheel includes chain tensioner nut and washer. The purchase of my latest p3l became an incentive to optimize my takealong tool kit. The left hand shifter selects the sprocket and the right hand one the internal gear. A brompton 6speed is just a brompton 3speed hub with a rear derailleur and a twosprocket cassette. Brompton 3 speed hub gear shifter for sram or sturmey. 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.
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. Here im interested in the 6speed models which, after all, give you the most gears you can buy on a brompton. I am still using the original chain, and sprockets front and rear. That being said, brompton 6speed bikes combine a 3speed internal gear with a 2speed rear miniderailleur. Inside the brompton wide range bwr hub chester cycling. 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. 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. From tiparts workshop, brompfication and nov design to chris king.
Brompton alloy front, sturmey archer 3speed rear rear derailleur. The brompton derailleur system is designed specifically to give optimum shifting on the short stays and small wheels of the brompton bicycle. 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. Three speed, five speed and six speed brompton bikes use a hub gear rear wheel. Brompton sturmey archer internal gear hub maintenance youtube. 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. 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 3speed hub internals cyclechat cycling forum. 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.
49 843 1366 875 352 1484 771 755 1422 1148 1055 1455 1137 1029 1176 432 671 787 1431 569 924 70 45 906 1104 1442 1293 787 1057 657 914 482 479 245 507