SRAM RED 1x XPLR Wide Crank Arm Assembly - 170mm, 13-Speed, 8-Bolt Direct Mount, DUB Spindle, Natural Carbon, E1When 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 generation 8 bolt interface compatible with power and non power AXS spiders and integrated chainrings (Spiders and Chainrings sold separately) DUB