To allow that singular focus, SRAM engineered the DUB™ spindle 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 Technology™ drastically improves sealing against the elementsSignificantly lighter than GXP® systemGutter Seal Technology™Sealed cartridge bearingsISO 4210 compliant.Specifications:BB-frame interface: English/BSA 68/73mmCrank-BB interface: DUBBearing type: StandardSpindle diameter: DUBCup material: Aluminium