Vehicle comprising a frame, a power module, a transmission and at least one axle, said axle comprising: - a carcass defining a space along an axis; - a pair of shafts (7a, 7b) housed at least partially in said space and comprising respective internal ends cooperating with said transmission of said vehicle configured to supply a driving torque to said shafts (7a, 7b); - respective wheel hubs carried in a rotationally free manner by said carcass, each wheel hub comprising: - a hollow portion carried in a rotationally free manner on said carcass around an axis of the latter, said hollow portion defining a chamber between its inner wall and said carcass, - a reduction unit housed inside said chamber and configured to vary the torque transmitted by one of said shafts (7a, 7b) of said axle and said wheel hub, said reduction unit comprising a gearing, - a selector rotationally coupled to said shaft (7a, 7b) of said axle and free to move on it along said axis, - actuator means configured to control the position of said selector along said axis, said gearing comprising a carrier integral with said hollow portion and a plurality of satellites meshing between said carcass of said axle and said carrier, said selector defining a toothing configured to selectively mesh with a first toothing integral with said carrier and a second toothing operatively connected to said satellites according to the position of said selector along said axis, wherein said actuator means are pneumatic and comprise a chamber in which a piston is free to slide and seal so as to divide said chamber in two portions fluidically separated from each other, said vehicle comprising a source of pressurized fluid, characterized in that said source of pressurized fluid is fluidically connected through a pair of ducts (41a, 41b) with said actuator means and said vehicle further comprises valve means fluidically interposed on said pair of ducts (41a, 41b) for regulating the passage of fluid under pressure therein, both said portions being fluidically connected to said source via said pair of ducts (41a, 41b), wherein said vehicle comprises a control unit and a plurality of sensor means configured to detect physical quantities relating to operational conditions of said vehicle, said control unit comprising processing means electrically connected to said sensor means for acquiring the data detected by them, processing them and consequently controlling said valve means as a function of data relating to said operational conditions stored in said processing means. - a carcass defining a space along an axis; - a pair of shafts (7a, 7b) housed at least partially in said space and comprising respective internal ends cooperating with said transmission of said vehicle configured to supply a driving torque to said shafts (7a, 7b); - respective wheel hubs carried in a rotationally free manner by said carcass, each wheel hub comprising: - a hollow portion carried in a rotationally free manner on said carcass around an axis of the latter, said hollow portion defining a chamber between its inner wall and said carcass, - a reduction unit housed inside said chamber and configured to vary the torque transmitted by one of said shafts (7a, 7b) of said axle and said wheel hub, said reduction unit comprising a gearing, - a selector rotationally coupled to said shaft (7a, 7b) of said axle and free to move on it along said axis, - actuator means configured to control the position of said selector along said axis, - a hollow portion carried in a rotationally free manner on said carcass around an axis of the latter, said hollow portion defining a chamber between its inner wall and said carcass, - a reduction unit housed inside said chamber and configured to vary the torque transmitted by one of said shafts (7a, 7b) of said axle and said wheel hub, said reduction unit comprising a gearing, - a selector rotationally coupled to said shaft (7a, 7b) of said axle and free to move on it along said axis, - actuator means configured to control the position of said selector along said axis, said gearing comprising a carrier integral with said hollow portion and a plurality of satellites meshing between said carcass of said axle and said carrier, said selector defining a toothing configured to selectively mesh with a first toothing integral with said carrier and a second toothing operatively connected to said satellites according to the position of said selector along said axis, wherein said actuator means are pneumatic and comprise a chamber in which a piston is free to slide and seal so as to divide said chamber in two portions fluidically separated from each other, said vehicle comprising a source of pressurized fluid, characterized in that said source of pressurized fluid is fluidically connected through a pair of ducts (41a, 41b) with said actuator means and said vehicle further comprises valve means fluidically interposed on said pair of ducts (41a, 41b) for regulating the passage of fluid under pressure therein, both said portions being fluidically connected to said source via said pair of ducts (41a, 41b), wherein said vehicle comprises a control unit and a plurality of sensor means configured to detect physical quantities relating to operational conditions of said vehicle, said control unit comprising processing means electrically connected to said sensor means for acquiring the data detected by them, processing them and consequently controlling said valve means as a function of data relating to said operational conditions stored in said processing means.