• All-mountain SLX HollowTech II crank set is tough and aggressive yet also lightweight and excellent value. • The HollowTech II Chainset features hollow forged crank arms which are both lightweight and rigid whilst being incredibly strong and durable. • HollowTech II integrated bottom bracket design uses a wide bearing placement with a large axle diameter for increased stiffness, efficiency and added durability. • 70 degree spider arm for optimal rigidity. • For 12-speed SM-CRM75 chainring (sold separately).