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 generation - 8-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 chainline