* The first external bearing track crank in the world* Designed for all-out velodrome racing, but also at home as the ultimate "fixie" crankset* Omnium features SRAM's strongest and stiffest alloy, 7050-T6* The 5mm thick 7075-T6 chainwheel is designed only for 1/2" x 1/8"chains* Bottom bracket included* 825g