Key Features:High performance rear Freehub for rim or Disc brakes: XT is renowned for offering the best performance to value ratio,Designed for use with Centre-Lock Disc rotors for secure hassle free setup,Super quick engaging Freehub body with pawl engagement every 10 degree giving near instant power transfer,Double contact sealing with internal grease sleeve helps to keeps out water and dirt from bearings ensuring constant smoothness and longevity whilst keeping the grease in place,Borozon treated cone bearing races give precision low-friction rolling,Cup and cone bearings for durability, strength and smooth rotation,For 142 x 12 mm dropouts (axle not included),Can be used with 8, 9, 10, 11-speed cassette sprockets.