ACE
7 Speed Rear Derailleur for Brompton Bicycle P/T Line
£109.00
Color
£109.00
By using with 10s cogs can support max 7 speed
Due to Brompton frame design, the best result will be 5 speed
Support up to 23T
From our experience, 5 speed with 11-13-15-17-21 (9s cogs) with best performance
or
6 speed with 11-13-15-17-19-21 (9s cogs)