We like a crank arm for our road, gravel, and cyclocross bike that is lightweight, strong, and sleek looking. Constructed with hollow Exogram carbon, the Red AXS Crank Arms provide a weightless feel. The SRAM DUB spindle interface is compatible with both power and non-power AXS spiders, as well as integrated chainrings. The Red AXS is also compatible with all SRAM Road DUB bottom brackets. Chainrings, spider, and bottom bracket are all sold separately.