| 摘要 |
<p>A pneumatic tire comprises a tread portion provided with an asymmetrical tread pattern comprising a pair of crown circumferential grooves (2) defining a crown rib (3) therebetween. The crown rib (3) is provided with: a central narrow circumferential groove (5) subdividing the crown rib (3) into a crown-rib outside portion (3o) and a crown-rib inside portion (3i); cooling slots (7o,7i) extending from the crown circumferential grooves (2); and cooling holes (8o,8i).</p> |
