Wheels Manufacturing T47 Bottom Bracket The T47 Bottom Bracket by Wheels Manufacturing uses Enduro Angular Contact bearings to give your cranks smooth, reliable rotation. The T47 is compatible with BB shells from 68mm to 132mm wide. Features Bearings Enduro Angular Contact Shell width 68-132mm Shell inner diameter 47 x 1. 0mm Threaded Crank spindle diameter 22/24, 24, and 30mm Weight 129g | Wheels Manufacturing | T47 Bottom Bracket 24/22Mm Spindle, Sram Gxp