When SRAM found ways to make their lightest and stiffest crank even lighter, they went for it. A new process further grams from the hollow carbon arms. Plus they're offering more crankarm lengths than ever before to ensure this crank works for you.Hollow carbon crank arms are 29g lighter than previous generation8-bolt interface compatible with power and non-power AXS spiders and integrated chainrings (Spiders and Chainrings sold separately)DUB bottom bracket adds durability and simplicity (Sold separately)Includes DUB Wide Spacer kit (2.5/3.0/4.5/5.5 mm)150mm Q-factor / 47.5mm 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-BoltColorNatural CarbonCrank Intended UseGravelCrank Length (mm)150Defined ColorCarbonDrivetrain Speeds12Drivetrain Speeds13Number of ChainringsNo Rings IncludedPedal Spindle9/16"RingsSold SeparatelySpindle Interface TypeSRAM DUB SRAM RED 1x XPLR 13-Speed Wide Crank Assembly E1 Crankset UPC: 710845925313