Shimano SLX FC-M7120 Bike Crank Set Without Ring 12 Speed 55 MM Chainline 175 MM

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) SM-CRM75 chainring teeth feature Shimano’s new Dynamic Chain Engagement technology offering enhanced chain retention, driving rigidity and highly efficient We recommend that the bottom bracket is initially installed by a bike shop to ensure perfect facing and fit For use with 12-speed HG+ MTB chains only With a 55 mm single ring chain line for use in conjunction with 148 mm O.L.D.