SRAM's most advanced aluminum road crankset is their most stunning. Careful engineering has resulted in crankarms that optimize stiffness to weight ratio, with material only where it's needed. Integrated chainrings deliver flawless shifting in ranges that fit your needs, with the whole package coming in over 50 grams lighter than the previous generation.Modern aluminum crankarms and aluminum 2x chainring optimizes stiffness to weight ratio, with material only where it s neededX-Range gearing technology gives you more range and a smoother gear progression, so you re always in the right gear2x aluminum intergrated chainring offers crisp and accurate front shiftsDUB bottom bracket adds durability and simplicity (Bottom bracket sold separately)45mm chainlineItem 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 UseRoadCrank Length (mm)160Defined ColorBlackDrivetrain Speeds12Number of ChainringsDoublePedal Spindle9/16"Rings46/33Spindle Interface TypeSRAM DUB SRAM Rival Crankset E1 Crankset UPC: 710845916168