1. Using high-strength aluminum alloy, light weight, safe and stable, strong and durable
2. Lightweight hollow, does not affect the strength of the disc
3. Precision CNC machining, positive and negative tooth shape, prevent chain drop
4. Material: aluminum alloy
5. Process: CNC machining, anode coloring, not easy to oxidize
6. BCD: 130mm
7. Specifications: 52/56/58T
8. Weight: 52T about 143 grams, 56T about 178 grams, 58T about 182 grams
9. Diameter: 52T about 21.6 cm, 56T about 23.1 cm, 58T about 24.2 cm
