Our solution for running a 29mm spindle crankset (SRAM DUB) in a BSA threaded frame Machined aluminium cups thread in to a standard threaded frame and feature Enduro 6806 ABEC-3 sealed bearings outboard of the BB shell Fully serviceable Bottom Bracket Shell Width (mm): 68mm - 73mm Bottom Bracket Shell I.D.: 33.6-33.9mm Crank Spindle Diameter: 29mm Tool Pattern: 48.5mm x 16-notch Over Bearing Width: 91.5mm in a 68mm wide shell Weight: 102g