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 Number of Chainrings No Rings, No Spider Included Drivetrain Speeds 13 Chainring BCD Direct Mount SRAM 8-Bolt Chainline/Hub Compatibility 135/142 Road Disc Hubs > 415 mm Chainstay Color Carbon Crank Length (mm) 160, 165, 170, 172.5, 175 Crank Intended Use Road BB Included No Pedal Spindle 9/16" Spindle Interface Type SRAM DUB Defined Color Carbon