Your eyes do not deceive you. Welcome to SRAM's most advanced aluminum gravel crankset. Careful engineering has resulted in crankarms that optimize stiffness to weight ratio, with material only where it's needed. And SRAM X-Sync chainrings are unbeatable at keeping your chain where it needs to be.Modern aluminum crankarms and chainring optimizes stiffness to weight ratio, with material only where it s neededX-Sync wide-tooth, narrow-tooth aluminum chainring technology provides maximum chain controlWide chainline for compatibility with Full Mount rear derailleursLonger DUB crank spindle accommodates both Road and MTB width frame bottom bracket standards for unmatched cross-compatibility across brandsDUB bottom bracket adds durability and simplicity (Bottom bracket sold separately)150mm Q-factor / 47.5mm chainlineCompatible with 135, 142 and Boost rear spacingItem SpecificationsBB IncludedNoChainline/Hub Compatibility135/142 Road Disc Hubs < 415 mm ChainstayChainline/Hub Compatibility135/142 Road Disc Hubs > 415 mm ChainstayChainring BCDDirect Mount SRAM 8-BoltColorBlackCrank Intended UseGravelCrank Intended UseRoadCrank Length (mm)160Defined ColorBlackDrivetrain Speeds12Drivetrain Speeds13Number of ChainringsChain Retaining SinglePedal Spindle9/16"Rings42Spindle Interface TypeSRAM DUB SRAM Rival 1x XPLR 12/13-Speed Wide Crankset E1 Crankset UPC: 710845916014