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Brompton chain...
Brompton gear indicator / chain...
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Brompton chain tensioner nut for 3 speed STURMEY ARCHER (steel shell)
QCTN3-SA[1]
Brompton gear indicator / chain tensioner nut for Sturmey Archer steel shell hub (pre-2004)
This is the shorter 16.9mm length nut
More info
Short Brompton chain tensioner nut
Technical notes:
This is the shorter 16.9mm nut used on old steel shell (2004 and before) hubs - using the SA I gear indicator chain
Current hubs (BSR and BWR) use a 19.5mm nut and use the SA II gear indicator chain
Chain tensioner / gear indicator nut:
(This is the nut with a hole in the side)
Earlier hubs 2004 and before (normally with steel shell) use this nut.
The difference between this and the later alloy shell nut may be small - but it is essential to use the right one.
Brompton Q part code: QCTN3-SA[1]
Brompton old (pre-2013) Q part code: QCTN3-SA-01
Brompton part number: 9010103
Reviews
The right part and a great service
After breaking the chain tensioner nut of my late 1980s Brompton (by over-tightening) I wasn't sure I would be able to find a replacement part. I came across Brilliant Bikes on the net and placed an order with a note about the age of my bike. The part arrived less than 24h later and it fitted perfectly! A hand written note and subsequent email made the experience quite pleasant, so I am writing this review even though I don't normally bother.
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