Shimano® SM-BB4600, BB51, BB52, BB5700, BB-RS500, BB6700, BB70, BB7900 & BB80
Campagnolo® SRAM®/Truvativ® GXP Chris King® FSA MegaExo® Hope® Race Face® X-type Surly®
Wheels Manufacturing™ Fulcrum®
Bafang® BBSH, BBS02 mid-drive e-bike motor lockrings
Outside diameter: 54mm
Needs wrench: 32mm / ½" square socket wrench