Run-flat tire and tire/wheel assembly

A run-flat tire, including:

• a run-flat support member constituted of a circular shell and elastic rings and inserted into a cavity of a pneumatic tire, the circular shell having a support surface thereof extended toward a periphery of the pneumatic tire and leg portions along each end of the support surface, and the elastic rings being attached to the leg portions of the circular shell;
• and
• stages extending in a tire circumferential direction and formed on inner walls of a pair of right and left beads,
• wherein the elastic rings are locked into the stages.

A tire/wheel assembly, in which a pneumatic tire is fit into a wheel rim, including:

• a run-flat support member constituted of a circular shell and inserted into a cavity of the pneumatic tire, the circular shell having a support surface thereof extended toward a periphery of the pneumatic tire and leg portions along each end of the support surface;
• and
• stages extending in a tire circumferential direction and formed on inner walls of a pair of right and left beads of the pneumatic tire,
• wherein the leg portions of the circular shell are locked into the stages.

A tire/wheel assembly, in which a pneumatic tire is fit into a wheel rim, including:

• a run-flat support member constituted of a circular shell and elastic rings and inserted into a cavity of the pneumatic tire, the circular shell having a support surface thereof extended toward a periphery of the pneumatic tire and leg portions along each end of the support surface, and the elastic rings being attached to the leg portions of the circular shell;
• and
• stages extending in a tire circumferential direction and formed on inner walls of a pair of right and left beads in the pneumatic tire;
• wherein the elastic rings are locked into the stages.