SRAM DUB PressFit30 Bottom Bracket - PF30 73mm MTB Boost 55mm Chainline 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.

Designed for use with SRAM Boost cranksets with 55mm chainlines

Gutter Seal Technology™ drastically improves sealing against the elements

Sealed cartridge bearings

One oversized spindle to work across every bottom bracket standard