| 摘要 |
PURPOSE: To prevent partial the wear produced on the side part of a land part and prevent degradation of running performance on roads. CONSTITUTION: In a pneumatic tire having a plurality of land parts 3 divided with a plurality of longitudinal grooves almost rectilinearly extending in the circumferential direction of the tire, many upper sipes 8 opening on the surface and the side part of the land part 3 and extending from the opening end of the side part 8 to a groove bottom 6 are spacedly arranged on the groove wall 4 of the side part of the land part 3, and further many lower sipes 9 opening on the way of the groove wall 4, the opening upper end parts of which enter into the territories between the upper sipes 7 and the opening lower end parts extend to the groove bottom 6, are arranged in the territories between these upper sipes 7, 7. |
