Patent ID: 8297325

Claim:
A pneumatic tyre for a wheel rim formed by a hub surrounded by a peripheral seat having an outer wall provided with a peripheral slot, the tyre comprising: a casing having an uninflated inner volume, said casing comprising an inner wall which is adapted to surround the outer wall of the peripheral seat and which is provided with a retaining bead adapted to be received in the peripheral slot in the peripheral seat, and a convex outer wall forming the tread of the tyre, wherein the inner wall of the tyre is concave, so as to surmount the outer wall of the peripheral seat, the inner wall and the convex outer wall of the tyre being connected by two annular borders adapted to cover the outer wall of the peripheral seat towards the hub, wherein the inner wall of the casing has a substantially semi-circular cross-section, wherein said convex outer wall of the tyre has a substantially semi-circular cross-section, and wherein the two annular borders extend radially inward beyond an inner surface of said retaining bead.