GUB CS12 Mountain Bike 12-Speed 11-50T Cassette Flywheel

• High tension steel plate, quenching process, tempering hardening treatment 

• Surface nickel-chromium silver, multi-layer plating anti-rust 

• Hollow design, strengthened aluminum frame 

Specifications: 

• Speed: 12 speed 

• Material: high tension steel plate + aluminum frame 

• Number of teeth: 11T-50T 

• Gear ratio: 11-13-15-17-19-21-24-28-32-36-42-50T

• Net weight: about 611g