Patent ID: 7036543

Claim:
A tire/wheel assembly having a run-flat support body inserted into a hollow part of a pneumatic tire, the run-flat support body including: an annular shell having an outer peripheral side thereof as a support surface and having an inner peripheral side thereof formed into fork-shaped open legs; and elastic rings supporting the end parts of the fork-shaped open legs on a rim, wherein bent parts are formed at the end parts of the annular shell where the annular shell is connected to the elastic rings, and the shape of the elastic rings in a cross section orthogonal to a circumferential direction is formed to have a barrel shape having bulges on both side faces, and wherein, in the cross section of each of the elastic rings, a maximum thickness of a part swelling from a first tangential line (L 1 ) is set to 3 to 6 mm, and a maximum thickness (B) of a part swelling from a second tangential line (L 2 ) in a main body of each of the elastic rings positioned radially inside of the bent parts is set to 1 to 5 mm, the first tangential line (L 1 ) extending from an apex (P 1 ) of a hump of the rim so as to abut on the axially inner end (P 3 ) of the bent part, the second tangential line (L 2 ) extending from the intersection (P 2 ) of the inner surface of the tire bead and a line segment (L 3 ) parallel to the tire axis through the centroid of the bead core so as to abut on the axially outer end (P 4 ) of the bent part.