Check the listing for details. SRAM Force Crank Arm Assembly - 165mm, 12/13-Speed, 8-Bolt Direct Mount, DUB. Color: Black, Condition: New. Listed at 180.00 USD. Form and function. The design of the Force crankarm is a wonder of carbon; light and stiff to effortlessly propel you forward. The 8-bolt interface will fit any SRAM AXS spider or integrated chainring, with or without power. The light, stiff, and durable DUB spindle interface also fits nearly any frame.8-bolt interface compatible with power and non-power AXS spiders and integrated chainrings (Chainring and spider sold separately). DUB bottom bracket adds durability and simplicity (Bottom bracket sold separately). Carbon fiber crankarms are incredibly strong and lightweight. Item Specifications: Number of Chainrings, No Rings, No Spider Included, Drivetrain Speeds, 12, Drivetrain Speeds, 13, Chainring BCD, Direct Mount SRAM 8-Bolt, Chainline/Hub Compatibility, 135/142 Road Disc Hubs.