SHIMANO Deore XT e-Thru Front Mountain Bicycle Hub - HB-M8010 15mm E-thru Axle system designed to be durable enough for all-mountain riding while remaining light enough for XC racing Center Lock disc brakes provide reliable braking power Cone races ground by a Cubic Boron Nitride tool for smooth rolling durability Includes rotor lockring Front Axle: 15mm Thru x 100mm