| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire capable of improving both wet performance and life performance contrary to each other, in performance of the tire.SOLUTION: A tire includes: a plurality of ribs partitioned by a plurality of circumferential-direction main grooves extending along a tire circumferential direction; one-end opening narrow grooves formed in shoulder ribs positioned at both ends in a tire width direction, each having one end opened in the circumferential-direction main groove adjacent to the shoulder rib, and each having the other end terminated and closed inside the shoulder rib; and both-end opening grooves formed in each rib positioned between one pair of shoulder ribs, and each having both end parts opened in the circumferential-direction main grooves adjacent to each rib. A depth of the one-end opening narrow groove is set to be a range of 20-30% to a depth of the circumferential-direction main groove; the both-end opening groove is configured by alternately forming narrow grooves and wide grooves each having a narrow groove in a bottom part in the circumferential direction; and depths of the narrow groove and the wide groove including the narrow groove are set to be in a range of 60-90% to the depth of the circumferential-direction main groove. |
