Patent ID: 7730918

Claim:
A vehicle rim, of revolution, intended for mounting a tire and an annular bearing support capable of supporting a tread of the tire in the event of a loss of inflation pressure from the tire, the rim comprising: a first and a second rim seat, the mean diameter of said first rim seat being less than the mean diameter of said second rim seat, each of the rim seats being intended to receive a bead of the tire, each of the rim seats having a generatrix the axially inner end of which is on a circle of diameter D I greater than the diameter D E of the circle on which the axially outer end is located; a supporting bearing surface formed of at least one substantially cylindrical surface of revolution of mean diameter D P extending axially between the two seats and intended to be in close contact with the bearing support; a circumferential groove located axially between the supporting bearing surface and the first rim seat; wherein the first rim seat is delimited axially to the inside by a protrusion the external diameter D S of which is greater than the mean diameter D P of the supporting bearing surface, and wherein the axial width L G of the circumferential groove located axially between the supporting bearing surface and said protrusion is adapted to enable the support to pass over said protrusion; wherein the axial width L G of the circumferential groove located axially between the supporting bearing surface and the protrusion delimiting axially to the inside the seat of smaller diameter is equal to or greater than the axial width L P of the supporting bearing surface.