Ztto MTB Mountain Bike Bicycle Parts 9s Speed Freewheel Cassette 11-40t Wide Ratio 9S 11-40T

Description

The material of high tensile steel made by the technology of quench-temper hardening, makes it more wear resistant 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 shift function. The surface made by the technology of chrome plating, makes it hard to rust and provides a long service life. And the surface of black has a fine appearance and will give you a luxurious feel.