Sturmey Archer gear indicator chain Mk II
As used on the current (as at 2018) Brompton BSR - Brompton Standard Ratio and BWR (6 speed) - Brompton Wide Ratio wheels
This chain pulls the internal hub gear to actuate a gear change (don't pedal as you change hub gears)
Suitable for Sturmey Archer / Brompton alloy shell hubs
This has a longer axle than the MK I - but you won't be able to compare unless you have both
We have added a picture with approx size to help you measure the axle length (we make it approx 65.5mm from the tip of the the screw - into the axle - to the end of the knuckle on the first link of the chain)
The gear indicator chain comes complete with the locking nut which tightens against the cable anchor on the Brompton
As of 2024 a small split washer is included to prevent the chain from coming loose, that cam happen when the gear cable is slack, open the packing carefully so as not to loose it
Compatible hubs include:
- Brompton Sturmey Archer BWR 6 speed - Brompton Wide Ratio - this includes the Brompton Electric Brompton Wide Ratio rear wheel
- Brompton Sturmey Archer BSR - Brompton Sturmey Archer - as used on the B75 / A Line
- Sturmey Archer AW / SAB3 / AB / AG with 6 1/4 inch (159 mm) axle length
- Sturmey Archer SC3 with 6 inch (152 mm) axle length
- Sturmey Archer S5 with 5 13/16 inch (148mm) axle length - used on left hand side
- Sturmey Archer S5 with 6 1/16 inch (154mm) axle length - used on both left and right hand sides
- Sturmey Archer S5 with 6 5/16 inch (160mm) axle length - used on right hand side
Brompton Q part code: QGICH3-SA[2]
Brompton old (pre-2013) Q part code: QGICH3-SA
Brompton part number: 9011094
Sturmey archer part code / sales no: HSA126 - Gear Indicator MK2
This can be identified by SA II carved into the the spindle (you will need to remove the indicator chain to check what yours says) - you will also need to remove the dirt covering the marking on your existing indicator chain
We made this short video showing where the gear indicator chain fits and connects to the gear cable via the cable anchor, and how to adjust the hub gears
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