2J Shimano XT FC-M8000-B2 Cranksets176 Q-Factor, 51.8mm chainline4 bolt spider compatible with all XT 8000 series chainring configurationsAluminum crank arm and spider with steel spindleAluminum/CFRP outer ringHollowtech II crank arm constructionSteel driving gear teeth and aluminum support gearsItem SpecificationsColorBlackSpindle Interface TypeShimano Hollowtech IIPedal Spindle9/16Chainring BCD64 Shimano AsymmetricChainring BCD96 Shimano AsymmetricRings36/24BB IncludedNoCrank Intended UseMountainDefined ColorBlackCrank Length (mm)175Drivetrain Speeds11Number of ChainringsDoubleChainline/Hub Compatibility141/148 Boost Hubs 1809807 (223 224 225 226) 6/17