General description SRAM Hub Bearing Set Freehub is designed for high-performance cycling, compatible with X0 hubs, RISE60 (B1), ROAM 30, ROAM 40, and RAIL 40 models. This set includes the essential 2-63803D28 bearings, ensuring smooth operation and durability for your bike's hub system. Technical specifications Model: SRAM Hub Bearing Set Freehub Includes: 2-63803D28 bearings Compatibility: X0 hubs, RISE60 (B1), ROAM 30, ROAM 40, RAIL 40 Part number: 11.1918.003.050