Sram: 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.FEATURESOne oversized spindle to work across every bottom bracket standard.Greater bearing durabilityEasy installationThreaded internal cups for integrated look  SPECIFICATIONSBB-frame interface T47 (Road and Road Wide) 68mm, T47 (Road and Road Wide) 77mm, T47 (Road Wide: 85.5mm), T47 (Road: 85.5mm)Crank-BB interface DUBBearing type Ceramic, StandardSpindle diameter DUBSpindle length n/aChainline n/aSupport E-type FD n/aCup material Aluminum