shimano fcm7100 slx 12-speed 52 mm chainline 165 mm crank set w/o ring

All-mountain SLX hollowtech ii crank set is tough and aggressive yet also lightweight and excellent value.Features:The hollowtech ii chainset features hollow forged crank arms which are both lightweight and rigid whilst being incredibly strong and durableHollowtech ii integrated bottom bracket design uses a wide bearing placement with a large axle diameter for increased stiffness, efficiency and added durability70 degree spider arm for optimal rigidityFor 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 efficientWe recommend that the bottom bracket is initially installed by a bike shop to ensure perfect facing and fitFor use with 12-speed hg+ MTB chains onlyWith a 52 mm single ring chain line for use in conjunction with 142 / 148 mm o.L.D.