7 Speed Rear Derailleur and Tensioner Set for Brompton Bicycle

Note:

Derailleur can use for  Brompton P/T Line or A/C/E Line (Adaptor Included) 

Tensioner can use for Brompton A/C/E Line only

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).