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: 10 Speed 40T (silver): 429g, 10 Speed 42T (silver): 442g, 11 Speed 40T (silver): 446g, 11Speed 42T (silver): 460g, 11 Speed 46T (silver): 546g, 11 Speed ??50T (Silver): 580g, 12 Speed ??50T (Silver): 600g, 9 Speed ??42T (Silver): 426g, 12 Speed ??52T (Silver): 688g, 11 Speed ??52T (Silver): 669g, 9 Speed ??40T (Silver) : 409g, 9 Speed 46T (silver): 426g, 8 Speed 42T (silver): 371g, 10 Speed 42T (black): 416g, 11 Speed 46T (black): 554g, 11 Speed 50T (black): 575g, 11 Speed 52T (black): 674g, 12 Speed 50T (black): 589g, 12 Speed 52T (black): 691g, 10 Speed 50T (silver): 541g, 9 Speed 42T (black): 418g, 11 Speed 42T (black): 450g, 10 Speed 50T (black): 540g