| 摘要 |
<p>A plurality of ribs (9, 11 and 13) extending in a tire circumferential direction (C) are defined in a tire width direction (W) by a plurality of circumferential main grooves (5 and 7). In two or more second ribs (11), a plurality of sipes (19) are formed so as to be spaced apart in the tire circumferential direction (C) and to cut across the ribs. By the plurality of sipes (19), the two or more second ribs (11) are divided into a plurality of divided ribs (21). All intersection angle portions on one side in the tire circumferential direction (C) in each of the divided ribs (21) are formed to have obtuse angles. Only on one side in the tire circumferential direction (C) in each of the divided ribs (21), a runner groove (23) communicated with the corresponding sipe (19) is formed so as to cut across the second rib (11).</p> |
