The SRAM DUB bottom bracket series has a simple job- to connect crankarms and protect the smooth, long-lasting application of power to the drivetrain. SRAM engineered the oversized DUB spindle to work across every bottom bracket standard, simplifying crankarm compatibility *Gutter Seal Technology(TM) drastically improves sealing against the elements *Sealed cartridge bearings *One oversized spindle to work across every bottom bracket standard *Significantly lighter than GXP system