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  • Brompton Chain Tensioner Assembly for 3 and 6 Speed Bikes (5251457155)
  • Brompton Chain Tensioner Assembly for 1 and 3 Speed Bikes (5251457155)






We currently have 1 in stock.

The Brompton Chain Tensioner Assembly performs a very important role on a Brompton bike. It keeps the chain tight while folded or unfolded, and most importantly, while folding and unfolding it prevents your chain from dropping and drama ensuing.   

It is made from extremely durable Nylon plastic with a strong steel spring to keep things tight and is supplied with new Jockey wheels which ensure you pedal smoothly. Available for Brompton 2-speed and 6-speed bikes, or 1-speed and 3-speed bikes. 

  • Brompton Chain Tensioner Assembly
  • Genuine Brompton Replacement Parts
  • Available for Brompton 2 and 6 speed bikes, or 1 and 3 Speed bikes 
  • Strong steel spring keeps things tight
  • Constructed from durable Nylon plastic
  • Includes jockey wheels
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 rideability 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.

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