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QCTADR
Replacement chain tensioner assembly for Brompton bicycles with a derailleur (2 speed or 6 speed)
We have 8 left in stock in stock
Warning: Last few in stock!
Availability date:
This chain tensioner is for Brompton folding bikes with 2 speed, 6 speed SRAM or 6 speed Sturmey Archer / BWR (Brompton Wide Ratio) gears
This can be identified by the fact it has 2 identical looking black jockey wheels where the chain sits in a groove in the jockey wheel
This works as a chain tensioner (keeping the chain tight when riding and folded) and as part of the Brompton designed derailleur mechanism - by having juckey wheels which can move from side to side to allow the chain to move between the two rear sprockets
To make your chain tensioner last as longer - keep your chain clean and not over lubricated
For details of how to adjust the Brompton derailleur, check out this technical video from Brompton.
Fitting instructions are included or can be viewed in the downloads tab
Brompton Q part code: QCTADR
Brompton part number: 9023011
Weight: approx. 143g
If you have a single, three or five speed Brompton (i.e. no derailleur) then you need the standard chain tensioner (QCTA)
We made this short video to help identify which chain tensioner you have, as well as how to remove and install it
We also made this video about how the chain tensioner fits into the Brompton derailleur system and how to adjust that
Quick Delivery
My chain tensioner fell apart and I ordered a replacement from Brilliant Bikes - it arrived the next morning. Great service as usual. Thanks
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Origin | UK |
Comm Code | 87149990 |