| 摘要 |
PROBLEM TO BE SOLVED: To provide a tire for traveling on an irregular ground with the improved durability of a tire without deteriorating the performance of the tire. SOLUTION: A tread part 16 of a pneumatic tire 10 is constituted of an inner part having a tire centerline, and an outer part positioned outside the tire at the inner part. An inclination angle of each block 24 forming a block pattern train on the outer part relative to a tread normal V of a groove wall 25 on a tread side ranges from 5-10°on the center side, and 10-30°on the shoulder side. Also, an angle gradually-reduced part 25P, whose inclination angleθ1 is gradually reduced from the shoulder side to the center side is formed on the groove wall 25. This can restrain abrasion and fractures at the groove wall 25 on the block treading side, and improve durability. COPYRIGHT: (C)2005,JPO&NCIPI |
