The 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.TECHNOLOGYDUBThe relationship between bottom bracket spindle and bearing is the core of DUB technology. Its where stiffness meets durability. We took it a step beyond conventional thinking and made everything simplerbetter integrating the relationship between chainring, crank, spindle and bottom bracket. Its this approach to developing a complete system that equals better drivetrain performance.FEATURESOne oversized spindle to work across every bottom bracket standardGreater bearing durability