Tire/wheel assembly and noise reduction interior member

A tire/wheel assembly comprising:

• a wheel having a rim;
• a pneumatic tire mounted on the rim of the wheel, the pneumatic tire having a cavity;
• and
• a noise reduction interior member disposed in the cavity of the pneumatic tire in such a manner that the noise reduction interior member divides the cavity of the pneumatic tire into an inner cavity part and an outer cavity part, the noise reduction interior member having left and right elastic rings fitted to the rim and an annular body attached between the elastic rings,
• wherein the annular body has a plurality of openings through which the inner cavity part and outer cavity part are communicatingly connected, the annular body having regions equally sectioned in a circumferential direction thereof, the plurality of openings being unevenly distributed in such a manner that the regions have openings which are different in total opening area.

A noise reduction interior member which is to be disposed in a cavity of a pneumatic tire mounted on a rim of a wheel, comprising:

• left and right elastic rings fitted to the rim;
• and
• an annular body attached between the elastic rings,
• wherein the annular body is configured such that an annular cavity portion surrounded by the noise reduction interior member and the pneumatic tire has a cross-sectional area that varies in a circumferential direction of the tire.

A noise reduction interior member which is to be disposed in a cavity of a pneumatic tire mounted on a rim of a wheel, comprising:

• left and right elastic rings fitted to the rim;
• and
• an annular body attached between the elastic rings,
• wherein the annular body has a plurality of openings, the annular body having regions equally sectioned in a circumferential direction thereof, the plurality of openings being unevenly distributed in such a manner that the regions have openings which are different in total opening area.