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QCTIDL
Brompton standard chain tensioner idler (jockey wheel) set (pair) for Brompton bikes with no derailleur
We have -1 left in stock in stock
60 on order - due soon!
Warning: Last few in stock!
Availability date:
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 2020 Q part code: Q101509
Brompton Q part code: QCTIDL
Brompton part number: 9023073
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.
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
Exact replacement.
Perfect swap. Fits fine. Does what it says on the tin.
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Origin | TAIWAN |
Comm Code | 87149990 |