What size bottom bracket do I need is one of the most common questions we receive. If you are unsure which bottom bracket you need, check out our article and video that covers bottom bracket sizing!The SRAM DUB bottom bracket series has a simple job to connect crankarms and protect the smooth, long-lasting application of power to the drivetrain. SRAM engineered the oversized DUB spindle to work across every bottom bracket standard, simplifying crankarm compatibility.English BSA thread, 68/73mmGutter Seal Technology drastically improves sealing against the elementsSealed cartridge bearingsOne oversized spindle to work across every bottom bracket standardSignificantly lighter than GXP systemItem SpecificationsBB Shell Width (mm)68BB Shell Width (mm)73BB/Frame InterfaceEnglishBottom Bracket Shell I.D.1.37Defined Color ListBlackSpindle Interface TypeSRAM DUB SRAM DUB Threaded Bottom Bracket Bottom Brackets UPC: 710845813726