Sram: SINGULAR FOCUS. BETTER SOLUTION.The new SRAM DUB™ bottom bracket series has a simple job-connect your crankarms and protect the smooth, long-lasting application of power to your drivetrain. To allow that singular focus, we've 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. THINGS TO REMEMBEROne oversized spindle to work across every bottom bracket standardGutter Seal Technology™ drastically improves sealing against the elementsSignificantly lighter than GXP® systemFEATURES AND BENEFITSGutter Seal Technology™Sealed cartridge bearingsISO 4210 compliant. See Declaration of Conformity for details.SPECIFICATIONSBB-frame interface English/BSA 100mm, English/BSA 73mm, English/BSA 83mmCrank-BB interface DUBBearing type StandardSpindle diameter DUBSpindle length n/aChainline n/aSupport E-type FD n/aCup material Aluminum, Steel