Wheels Manufacturing DUB Bottom Brackets DUB by SRAM is compatible with all major bottom bracket standards. SRAM designed the DUB system for discerning Pros and riders who like to set it and neglect it. If you have a pair of DUB cranks, buy the bottom bracket that corresponds to your frameset, install it, and forget it. Available bottom brackets are listed in the dropdown menu above. Features Compatible with SRAM DUB cranksets Machined aluminum cups No more creaking Smooth operation Fast bearing replacement. | Wheels Manufacturing | Sram Dub Bottom Brackets Bb30 Shell, Dub Spindle, Abec-3 Bearing