SRAM CenterLine X Ti Rounded Road Bike RotorAccurately constructed and machined to meet the UCI standards, SRAM has packed some of its best features into its CenterLine X Ti Rounded disc brake rotor. Specifically designed for road bike racing, it ensures your brakes run smoothly and reliably. The edges have been rounded to make it run quieter, increase safety and make wheel installation easier. With an alloy central spider, steel brake track and titanium bolts on the 6-bolt model, this lightweight rotor brings you increased brake performance without adding any unnecessary extra weight.Features: Brake Compatibility: All SRAM Road/Gravel/Adventure bike brakes such as Red, Rival and Force Mount Type: Separate 6-bolt or Center Lock options Lightweight, two-piece design Rounded edges are UCI-compliant and allow for easier wheel installs 6-bolt version comes with lightweight titanium bolts Weight: 140mm: 86g (approx.); 160mm: 102g (approx.); 180mm: 125g (approx.) Please Note: To use the 160mm or 180mm sizes, most road/gravel/adventure bikes will need additional “flat mount” or “post mount” caliper mount adaptors (sold separately)Manufacturer Part Numbers:140mm 6 Bolt: 00.5018.037.017160mm 6 Bolt: 00.5018.037.019180mm 6 Bolt: 00.5018.037.021160mm Centre Lock: 00.5018.037.023180mm Centre Lock: 00.5018.037.024 Buy SRAM Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.