18/21 Speed Rear Derailleur Mountain Road Bike Bicycle Gear Black

Description:

- Great transmission function.

- Alloy construction leads to lower weight without compromising strength and durability.

- It will be replacement part for the broken of your bicycle.

- Compatible with 18-speed and 21-speed bikes.

Specification:

- Material: Metal, Plastic

- Size: Approx.14x9.5cm / 5.5x3.7inch

- Hanger Hole Diameter: Approx.1.2cm / 0.48inch

- Compatibility: 18/21 Speed

- Color: Black

Package Includes: 1 Piece Bicycle Rear Derailleur