Brompton Advance 4-speed Shifter
For 4-speed and 12-speed Brompton folding bikes
The gear shifter uses a self-returning mechanism to change between the four gears on the Brompton 4-speed derailleur, pushing down changes to an easier gear, and up to a harder gear
The gear shifter uses a 1:1 pull ratio (if you are interested)
You should pedal while changing gear when changing gear using this shifter
Note - this shifter is not compatible with pre-2017 M/H handle bars and is only compatible with the 4-speed / 12-speed gear mechanism
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The pack consists of:
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Tools required for removal:
- Cassette lockring tool
- Chain whip
Tools required for installation:
- 3mm Allen key
- 4mm Allen key
- Torque wrench
The shifter mounts onto the brake lever via two M3 screws that need to be done up to 0.6Nm - do not over tighten!
There is a spacer between the brake lever and the shifter, this is vital to ensure clearance
The 4-speed shifter was introduced in 2022