120 teeth triple wedge pawl mechanism provides positive and secure drive, a freewheel sound like no other, and micro-notch engagement gaps for that perfect pedal pick-up.Wide flanged spaced CNC alloy shell.I.S. Disc compatible. Alloy cassette carrier (Shimano HG fitting).4 sealed bearings.12 x 150 mm axle fitting. (Axle NOT Included)International 6 bolt Disc Mounts.Tech:Black, White or Red.32H 150mm O.L.D Hub Tech:Flange Diameter: 58mmCenter Left: 40mmCenter Right: 30mm