Disc Speedhub 500/1414 Speed Internal gear hub.Hollow Quick release or solid axle types.32H or 36H. 135mm spaced. Boxed kit includes hub cables & O.E.M or OEM2 Axle plate.Special 4 bolt Disc fitting.(Disc not included... available as Rohloff specific part for most brake systems )526% range of gears (equivalent to typical 27Speed MTB derailleur system)14 Individual gears (no wasted overlaps or duplicates)Evenly spaced 13.6% gear increments. (no sudden big jumps)Ability to shift whilst stationary or under load.Super efficient sealed Oil bath mechanism (95-99%)Adjustment and maintenance free over thousands of miles.Gear positions are indexed inside hub