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 lookSPECIFICATIONSBB-frame interface: T47 (85.5)Crank-BB interface: DUBBearing type: StandardSpindle diameter: DUBSpindle length: n/aChainline: n/aSupport E-type FD: n/aCup material: Aluminum