ZTTO Mountain Bike 9 Speed Cassette 50T MTB Fiets 9S Bicycle Flywheel 11-50T

Description

The material of high tensile steel made by the technology of quench-temper hardening, makes it more sturdy and has extreme resistance to abrasion. The unique design of the gear sprocket exclusively for mountain bike, provides you a better experience to control the shifter. Adopted the hollow design to reduce the weight to some extent. The surface made by the technology of chrome plating, makes it hard to rust and provides a long service life.