SRAM DUB PressFit Bottom Bracket – BB121 121mm MTB Black. 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™ drastically improves sealing against the elements
Sealed cartridge bearings
One oversized spindle to work across every bottom bracket standard
