DUB Boost 55mm Chainline Threaded Bottom Bracket

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