A flanged bearing ring (10) for the wheel of a motor vehicle includes two different materials joined as a single piece: a tubular core (15) and an outer body (16) around the core. The outer body forms a radial flange (17) and is made of a lighter material than that of the core. At the axially outer end of the ring, at the side where the flange (17) is provided, the interface surfaces between the outer body (16) and the core (15) terminate in a groove (21) formed partly in the outer body and partly in the core. The groove (21) accommodates a sealing ring (22) made of rubber-like or elastomeric material which presses against both the outer body (16) and the core (15) so as to seal continuously, along an entire circumference around the axis (x), a separation line (23) between the core (15) and the outer body (16).