CABLE PULLEY ASSEMBLY
The Brompton Gear Cable Pulley Assembly is that odd looking black part mounted to the seat stay on the back off your Brompton. It is part of the Brompton hub-gear system used on all 3 and 6 speed Brompton bikes. It routes the gear cable through a 90-degree angle to the cable anchor which in turn connects to the gear indicator chain changing the gears on the 3-speed hub.
There is a wheel inside which should move freely to allow your gears to change without hassle. This can get clogged up over time. If it does then this is what you need.
- Genuine Brompton replacement part
- Made of tough plastic
- Contains a smooth wheel which allows the cable to move freely
- Adjustable Aluminum screw to get the gears just right
- Compatible with older SRAM and modern Sturmey Archer bikes
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A BIT ABOUT BROMPTON: If you were to walk into the store and look at a Brompton we would say there are three things you should look for in a folding bike. All of them are fairly obvious. One, the bike should ride well - and, on a small wheeled bike that's tricky because there's a fine line between maneuverability (which is a virtue) and twitchiness (which is a vice). Two, the bike should fold well - otherwise you're blood pressure will rise and you'll curse the day you bought it. Third, it should be transportable, or highly storable - because that's the whole point, right?
Brompton is the only company we've seen that answers all three criteria - and believe us, we've tried every brand out there. The reason others can't compete is because Brompton has answered a fundamental engineering problem. If a bike is going to unfold to a large footprint (which takes the twitch out) then it is unfolding to a bigger bike - and by all logic, a bigger bike unfolded would be a bigger bike folded. So, it's pretty much true that for most folding bikes they either have great rideabilty but poor transportability or vice versa. And nearly all of them are a mess to fold.
Not Brompton. Brompton has designed the Platonic form of all folding bikes. The bike folds to the smallest size on the market, unfolds in a highly precise and easy manner, and has the same axle-to-axle footprint as a hybrid bike. How did they do this? By not only designing a clever frame, but also designing some 1200 proprietary parts that make everything fit - and fit perfectly. Oh, and nearly all of this is made in England. No wonder this bike has a cult following.