HUB-BEARING HAVING A LIGHT ALLOY ROTOR-HUB

A hub-bearing assembly (10, 110, 210) is provided with: - a bearing unit (30) having a radially outer ring (31), stationary, a couple of radially inner rings (32, 33), rotatable, and a double row of rolling elements (34, 35), which are interposed between the radially outer ring and the radially inner rings, whose centers are located along a first circle having a radius (R), with respect to a symmetry axis (X) of the hub-bearing assembly (10, 110, 210), - a rotor-hub (20, 120, 220), rotatable and made of a light alloy, on top of which the radially inner rings (32, 33) are assembled, having a tubular portion (21, 221), to which is steadily fixed a flange portion, axially external and provided with a plurality of fixing holes (24), whose axes are located along a second circle having a radius (r), with respect to the symmetry axis (X) of the hub-bearing assembly (10, 110, 210), wherein - the radius (R) of the first circle of the rolling elements (34, 35) centers is greater than the radius (r) of the second circle of the fixing holes (24) axes.