MT500 disc wheel System brings high performance technology to a affordable price point.The Hub uses angular contact bearings designed to cradle the balls giving both radial and lateral support for superior strength and durability in real world riding conditions. They also offer precision bearing adjustment and easy maintenance,Easy to use Centre-Lock Disc Rotor mount for secure hassle free setup,24 round 2.3 mm butted stainless steel spokes,Contact seals with internal grease sleeve to keep the elements out and the grease in,24 mm wide clincher tyre compatible rim for use with 2 - 2.4 inch tyres,8/9/10/11-speed compatible,For 12 x 142 mm dropouts (axle not included).