Bottom Bracket SRAM DUB BB386EVO Press Fit 28.99mm Width: 86mm Diameter: 46mmBottom Bracket SRAM DUB BB386EVO Press Fit 28. 99mm The 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, we've engineered the DUB spindle 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.