Description:

The chain tensioner can support single speed, 2 speed, 3 speed and 6 speed. Both internal and external changes can be used.
Made of aluminium alloy material, CNC processing, durable and sturdy.
The bearing is placed inside the gear to ensure that when the guide wheel works, the frame does not move, only the guide wheel rotates, making the speed change more smooth.
Suitable for Brompton folding bike.
Lightweight and compact, easy to install and use. Nice accessory for cycling lovers.

Specification:

Material: Aluminum Alloy

Size Chart:

Size: 50mm/1.97inch

Package Includes:

1 Pair of Rear Derailleur Pulley