The Wheels Manufacturing BSA 30 bottom bracket threaded to 30mm is their solution to running a 30mm spindle crankset in a BSA (English) threaded frame. This bottom bracket features high quality aluminum cups and fully serviceable bearings.Allows for the use of 30mm spindle crankset with English (BSA) threaded bottom bracket shellsFor use with 30mm diameter cranks with an overall spindle length of at least 104mm when used in a 68mm wide BB shellWill not work with standard BB30 cranksets please measure your BB30 crank spindle lengthCompatible with frames that have 68-73mm English bottom bracket shells