To allow that singular focus, we've engineered the DUBspindle to be the one true unifying component. One oversized spindle to work across every bottom bracket specification. 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 specification.Easy installationOutboard and inboard cup options to support your bikes spec.Sealed cartridge bearings available in both stainless and ceramic versions Specifications:BB-frame interface T47 (Road and Road Wide) 68mmCrank-BB interface DUBBearing type StandardSpindle diameter DUBCup material Aluminum