Specially designed for brompton only, smart guide wheel diameter is reduced to 36.3mm, increase the following functions:
- Gear material can be selected: AL-7075 (red, blue), copper, titanium. ( Patents Pending )
- To enhance the derailleur transmission speed: + 40%
- Noise reduction value: - 30%
- Used directly, without having to change tension.
Material: Aluminium by CNC machined
Smart wheel: only 36.3mm O.D.