DescriptionShimano XT BB-MT800-PC Press Fit Bottom Bracket – BB107 107mm Black. Shimano XT BB-MT800 Hollowtech II Bottom Brackets.Designed for use with Shimano 24mm MTB cranksUses high quality sealed bearings TECH SPECSDefined ColorBlackBottom Bracket Shell I.D.41Spindle Interface TypeShimano Hollowtech IIBB Shell Width (mm)107BB/Frame InterfaceBB107