sram crank arm assembly force dubCrank arm assembly Force D2 DUB Unicorn Grey 172,5 mm (BB Chainrings not included) Specifications Arm Length 172,5 mm Arm Material Carbon Axle DUB Bcd Direct Mount Boost No Brand SRAM Color Unicorn Grey Gearing Without chainring Item Name Force Item Type Crank arm assembly Other Excl. bottom bracket, Spider, Chainrings and right arm Package '1 1 Series Name Force Speed 12 speed