SRAM Rival Crank Arm Assembly - 170mm 12/13-Speed 8-Bolt Direct Mount DUB Spindle BLK E1 Brand-Sunrace Aluminum arms optimized for stiffness

Aluminum arms optimized for stiffness and light weight

Crafted with high quality aluminum

Long toothy side knobs ensure your favorite gravel descent won’t unravel in the final corner

Internal Molded Heel Cap

Wolf Tooth engineers knew that they wouldn’t be able to get away with any old factory replacement part

SRAM Rival Crank Arm Assembly - 170mm 12/13-Speed 8-Bolt Direct Mount DUB Spindle BLK E1 Brand-Sunrace Aluminum arms optimized for stiffnessSRAM Rival Crank Arm Assembly 170mm 12 13 Speed 8 Bolt Direct Mount DUB Spindle Black E1. SRAM has taken aluminum to another level. Careful engineering has resulted in crankarms that optimize stiffness to weight ratio with material only where its needed8 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