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.Features-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 standardItem Specifications-Bottom Bracket Shell I.D.:41-BB/Frame Interface:BB89.5-BB/Frame Interface:BB92-BB Shell Width (mm):89.5-BB Shell Width (mm):92-Spindle Interface Type:SRAM DUB-Defined Color:Black