Description: Great transmission function. Alloy construction leads to lower weight without compromising strength and durability. It will be replacement part for the broken one 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: Silver Package Includes: 1 Piece Bicycle Rear Derailleur
