SRAM DUB BSA Threaded Bottom Bracket - 68/73mm - BlackSRAM DUB BSA Threaded Bottom Bracket To allow that singular focus, SRAM 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. The SRAM DUB Threaded MTB bottom bracket simply connects your crankarms and allows