SRAM Crank Arm Assembly Force D1 DUB Gloss 172.5 (BB/Spider/Chainrings not included)The SRAM Force AXS Crank Arm Assembly features carbon crank arms that are ready to pair with any SRAM AXS spider or integrated chainring, with or without power. 8 bolt interface is compatible with power and non power AXS spiders and integrated chainrings Not compatible with SRAM's 3 bolt direct mount interface Carbon fiber arms with natural carbon finish Spider and chainrings sold separately