Sturmey Archer 3 speed Indicator Chain MK 1
It can be identified by the SA I engraved onto the indicator chain
This chain pulls the internal hub gear to actuate a gear change
Screws into the rear wheel hub and connects to the gear cable anchor
Used on the following Sturmey Archer hubs:
Sturmey Archer AW / SAB3 / AB / AG with 5 3/4 inch (or 146mm) axle length
Sturmey Archer S5 with 5 13/16 inch (or 148mm) axle length - right hand side (these hubs had two gear indicators)
Brompton Q part code: QGICH3-SA[1]
Brompton old (pre-2013) Q part code: QGICH3-SA-01
Brompton part number: 9011117
Sturmey Archer part code: HSA125
Colour: Silver