Compatible with Shimano, SRAM & FSA 10/11-Speed drivetrains, the SLK-Light’s CNC Machined, AL7075 chainring gives you clean & accurate shifts & excellent durability. Its AL7050 aluminium B386EVO 30mm spindle is designed to be compatible with a wide range of bottom bracket types, including BSA, BB30, PF30 & BB86 types. Please Note: Bottom bracket sold separately