Brompton 13T sprocket - 3 spline
Replacement Brompton 13 tooth sprocket with 3 splines (ISO) - for 3 speed BSR wheel
The Brompton 3 spline (also known as ISO) sprocket will fit 3 speed Sturmey Archer (not BWR/wide ratio) or 3/6 speed SRAM/Sachs rear Brompton wheels. As used on the Brompton B75
For use with the 3/32 inch chain
The rear side of the sprocket has a flange / step built in - this should be facing to wards the hub/centre of the wheel
Click here for more info on the complete SACHS/SRAM sprocket stack
Here is a short vide we made on removing your existing sprocket
Brompton 2020 Q part code: Q100040
Brompton Q part code: QRSPR13DR
Brompton part number: 9024049