1. Easy to install, not easy to rust
2. CNC precision machining, high hardness, wear-resistant and durable
3. Smooth speed change, one-piece molding
4. Using high-strength aluminum alloy to reduce weight, improve strength and rigidity, strong force, not easy to break
5. Vacuum plating, anti-oxidation, vacuum plating forms a special protective film to prevent surface oxidation
6. Material: aluminum alloy
7. Weight: 9-speed 42T: 426g, 10-speed 42T: 458g, 10-speed 50T: 540g, 11-speed 50T: 590g, 11-speed 52T: 690g, 12-speed 50T: 615g, 12-speed 52T: 710g