By popular demand, we've added this PF30 with outboard bearing BB for use with 29mm spindle SRAM DUB cranksets when used in PF30 frames The two machined aluminium cups thread together keeping the bottom bracket stable in the frame, increasing bearing life, and simplifying maintenance This means no more creaking, smoother operation, longer bearing life, and really quick bearing replacement Bottom Bracket Shell Width: 61mm to 73mm Bottom Bracket Shell I.D.: 46mm Over Bearing Width: 89mm in 68mm wide shell Crank Spindle Diameter: 29mm Tool Pattern: 48.5mm x 16-notch Weight: 156g