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Brompton standard chain tensioner idler (jockey wheel) set (pair) View larger

Brompton standard chain tensioner idler (jockey wheel) set (pair)

QCTIDL

Brompton

Brompton standard chain tensioner idler (jockey wheel) set (pair) for Brompton bikes with no derailleur

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We have 6 in stock

£3.50

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Brompton chain tensioner replacement jockeys wheels

The chain tensioner on the Brompton keeps the chain taut, both when riding and when folded (to stop it falling off of the front chain ring)

The chain passes over the two jockey / idler wheels on the chain tensioner - and over time (that time depends upon riding conditions / style and especially how clean the chain is) they can wear - causing the chain to start slipping (the same applies to the rear sprockets)

This is a replacement pair of jockey wheels for the chain tensioner (sometimes called a derailleur even though on this model it is not - it just keeps the chain tension correct when riding and folded)

For use on single, three and five speed Bromptons (i.e. for Bromptons with a standard - non-derailleur - chain tensioner)

A new set (pair) of Jockey / idler wheels for the chain tensioner

Brompton Q part code: QCTIDL
Brompton part number: 9023073 

Reviews

Grade 
27/02/2016

easy to replace.

These little wheels are easy to fit. I have ridden my Brompton so much that I have now got through two sets of these - over the years they get worn away and you suddenly find the chain is coming off rather easily when you fold the bike and the jockey wheels have been worn down to half their original size.

  • 1 out of 1 people found this review useful.
Grade 
01/06/2015

small chain tensioner wheels

Easy to fit came with the bolts (not showing in photo) these have Allan key heads re-placing slot headed bolts that were on before

    Grade 
    24/03/2015

    Exact replacement.

    Perfect swap. Fits fine. Does what it says on the tin.

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      Brompton standard chain tensioner idler (jockey wheel) set (pair)

      Brompton standard chain tensioner idler (jockey wheel) set (pair)

      Brompton standard chain tensioner idler (jockey wheel) set (pair) for Brompton bikes with no derailleur

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        Answered questions

      • Asked by david sharpe
        on 05/12/2018
        My tensioner on a 3 speed Brompton has has cogs that look more like those on the derailleur model. I have bought the ones above from you -can they be fitted even though they dont look like the ones on the bike? thanks :) Answer:
        Hi, the derailleur ones are designed to move side-to-side with the chain pusher to change gear. The non-derailleur ones are static to keep the chain on the rear sprocket. It sounds as if at some point the wrong tensioner has been fitted. Could you send us a photo of the tensioner and the rear sprockets / hub so we can give a better answer?

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