Sram BB T47 A Dub Road WideFeatures Gutter Seal Technology drastically improves sealing against the elements Sealed cartridge bearings One oversized spindle to work across every bottom bracket standard Significantly lighter than GXP system BB Shell Width: choose; 68mm, 77mm, or 85mm BB Frame Interface: T47 for Sram DUB Bottom Bracket Shell I. D.: 47 Spindle Interface Type: SRAM DUB NOTE: wide version Designed for use with SRAM Wide Cranksets Fits: 68mm has external bearings;