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 separatelymanufacturer part numbers140mm 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.