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.BB30, 68mm roadDesigned for use with SRAM Wide CranksetsGutter Seal Technology drastically improves sealing against the elementsSealed cartridge bearingsOne oversized spindle to work across every bottom bracket standardItem SpecificationsBB Shell Width (mm)68BB/Frame InterfaceBB30Bottom Bracket Shell I.D.42Defined ColorBlackSpindle Interface TypeSRAM DUBWeight120 SRAM DUB Road-Wide Non-Threaded Bottom Bracket Bottom Brackets UPC: 710845854361