| 摘要 |
<p>The present invention provides a pneumatic tire with reduced air columnar resonance noise level in comparison with the conventional pneumatic tires. The pneumatic tire comprises large-volume oblong holes 11 formed in a sidewall 10a on one side of a main groove 1 and small-volume oblong holes 11 formed in a sidewall 10b on the other side thereof, respectively, in which a width w1 and a depth d1 of the large-volume oblong hole 11 are at least not less than 0.4 mm and more than 0.05 times but less than 0.25 times a width W of the main groove 1, and a space p1 between the large-volume oblong holes 11 is at least not less than 0.8 mm and more than 0.2 times but less than 1.0 times the width W, a width w2 and a depth d2 of the small-volume oblong hole 12 are at least not less than 0.2 mm and more than 0.01 times but less than 0.05 times the width W, and a space p2 between the small-volume oblong holes 11 is at least not less than 0.4 mm and more than 0.04 times but less than 0.2 times the width W, and each height h of the oblong holes 11 and 12 in the depth direction of the main groove 1 is 50 to 80% of a depth D of the main groove 1.</p> |
