Shimano MT15 Mountain Bike wheels are engineered to perform in varied riding conditions The Hub uses angular contact bearings designed to cradle the balls giving both radial & lateral support for superior strength & durability in real world riding conditions. They also offer precision bearing adjustment & easy maintenance 28 hole aluminium anodized 24.6 mm wide disc rims Easy to use Centre-Lock rotor mount for use with disc brakes 28 round spokes Contact seals with internal grease sleeve to keep the elements out & the grease in For 142 x 12 mm dropouts (SM-AX75 axle not included) For use with 8, 9 & 10-speed cassette sprockets Average weight 1246 grams