Sealing device, in particular for wheel hubs of motor bikes

A sealing device (1) including an annular reinforcing insert (7) couplable with a wheel hub (2) in use and an annular sealing element (11) carried by the reinforcing insert and including at least one sealing lip (12) cooperating with a spacer (3) carried by a wheel support pin (3b) in use; the reinforcing insert delimits an annular chamber (14) arranged directly adjacent to the annular sealing element in axial direction, and the device further includes a shield (16) mounted in floating manner with radial and axial play in the annular chamber (14), including a first radial end (17), which extends to the lip (12) and couples in forced manner with the spacer (3) in use, and a second radial end (18), opposite to the first, which cooperates with the reinforcing insert (7) and with the annular sealing element (11) to create a labyrinth seal (19) in the annular chamber interposed in use between the annular lip (12) and an environment (E) external to the wheel hub (2).