1. Constructed from high-strength, lightweight carbon fiber material 2. CNC machined interface 3. 7075 aluminum alloy with anodized finish for durability and fade-resistant color 4. Smooth rotation with low-friction transmission for effortless riding 5. Ceramic bearings deliver superior lubrication and extended longevity 6. Deep-cut teeth design ensures tight chain engagement, reducing wear and preventing chain drop for high rotational efficiency 7. Materials: carbon fiber sandwich construction, ceramic bottom bracket 8. Gear tooth count: 13T-18T 9. Compatible with 8-11 speed systems 10. Size: about 14.2 x 8.8 x 1.4cm
