ZTTO Road Bike Mountain Bike 8/9/10/11/12 Speed Cassette
Material:Steel
Compatibility:8-12 Speed road bike mountain bike HG system
Ratios: 11-23/25/28/30/32/34/36
The new highway flywheel, high-tensile steel plate nickel-chromium treatment, hollow design, reduce weight
nickle-plated surface, corrosion,high wear resistance and long service life