The SRAM DUB bottom bracket series is engineered to connect crankarms and protect smooth, long-lasting power delivery to the drivetrain. SRAM's oversized DUB spindle design works across every bottom bracket standard, simplifying crankarm compatibility. Featuring Gutter Seal Technology(TM) that drastically improves sealing against the elements, this bottom bracket uses sealed cartridge bearings for durability and reliability. The one oversized spindle design eliminates the need for multiple bottom bracket types across different frame standards.