SRAM DUB BB30 (Road) 73mm Bottom BracketSRAM DUB BB30 (ROAD) 73MM BOTTOM BRACKET The new SRAM DUB bottom bracket series has a simple jobconnect your crankarms and protect the smooth, long lasting application of power to your drivetrain. To allow that singular focus, weve 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