RaceFace X-Type bottom brackets for use with 24mm spindle cranksets from Race Face, Shimano and FSA. Allows the use of a 24mm spindle X-Type or EXI crankset in a 68/73mm BSA threaded bottom bracket shell 6805 bearings Aluminum cups Interchangeable with select Shimano and FSA BB systems Installed using standard 16-notch bottom bracket tool Spindle Interface Type: RaceFace EXI , Shimano Hollowtech II , FSA MegaExo , FSA MegaExo Light BB Shell Width (mm): 68 , 73 Bottom Bracket Shell I.D.: 1.37 BB/Frame Interface: English Weight: 95