This IceToolz bottom bracket wrench is suitable for bottom bracket cups with a diameter of 44mm. This is the 'normal' BSA bracket for 24mm axles. The BSA bracket is commonly used with Shimano® BB80, BB5700, XT® BB70, BB51, and earlier external bottom bracket bearings, s for Campagnolo®, Chris King®, FSA® MegaExo®, SRAM® / Truvativ® GXP®, Race Face® X-type, Surly®, Wheels®, Fulcrum®, Hope™ (non-BSA30) and others. The IceToolz bracket wrenches have a ½” recess to which a torque ratchet wrench can be connected so that the bracket can be tightened with the correct torque. IceToolz article number 11C1.