| 摘要 |
[Problem] To reduce road noise in running by disposing a noise damper made of a spongy material in a cavity of a tire. [Solution] A pneumatic tire-rim assembly 1 including a rim 2, a pneumatic tire 3 attached to the rim 2, and a noise damper 4 made of a spongy material which is disposed in a tire cavity "i" surrounded by the rim 2 and the pneumatic tire 3 and extends in the tire circumferential direction, wherein the noise damper 4 has a volume of 0.4 to 20% of the whole volume of the tire cavity "i" and is fixed to an inner surface 2i or 3i of the tire or rim, the noise damper 4 has a height of 30 mm or less from the inner surface, and the spongy material of the noise damper 4 has a hardness of 10 to 250 N, a tensile strength of 70 kPa or more and a specific gravity of 0.014 to 0.052.
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