| 摘要 |
PROBLEM TO BE SOLVED: To enhance direct-driving stability without sacrificing performance, including quietness, drainage or the like. SOLUTION: In a pneumatic radial tire, a tread part 21 is provided with land parts 26a, 27a, 28a defined by grooves 22, 23 in the peripheral direction run in generally parallel with a tire equator line, tread ground ends 25, and declined grooves 24 declined in the unidirection at an angle of 20-80 degrees relative to the equator line. Each declined edge 7 located in the peripheral direction of a tread at the nearby portion of each obtuse angle-side corner part 6 in the land parts 27a, 28a at the tread side region is provided with a curved chamfer part 5. The width of the chamfer parts 5 is maximized at the end edges in the width directions of the land parts 27a, 28a. |
