To allow that singular focus, SRAM engineered the DUBspindle to be the one true unifying component. One oversized spindle to work across every bottom bracket standard. For better crankarm compatibility. For better protection from the elements. For longer-lasting performance. To be stronger, smoother, simpler. Now, back to the ride.Key Features:One oversized spindle to work across every bottom bracket standardGutter Seal Technologydrastically improves sealing against the elementsSignificantly lighter than GXP® systemGutter Seal TechnologySealed cartridge bearingsISO 4210 compliant.Specifications:BB-frame interface: English/BSA 68/73mmCrank-BB interface: DUBBearing type: StandardSpindle diameter: DUBCup material: Aluminium