| 摘要 |
PURPOSE:To prevent the eccentric abrasion by dividing a tread part into a pair of outside regions positioned on the outside in the direction of width, center region and a pair of intermediate regions positioned between the outside regions and center region and forming a projection part at least in one intermediate region. CONSTITUTION:As for a pneumatic tire for heavy load, a plurality of main grooves 6 extending in the peripheral direction are formed on the tread part 5, and the tread part 5 is divided into a pair of outside regions 10 positioned on the outside in the direction of width, center region 11 positioned at the center in the direction of width, and a pair of intermediate regions 12 positioned between the both regions 10 and 11. In this case, a projection part 13 which projects outwardly in the radial direction and extends in the circumferential direction is formed at the part having a low set pressure in a train 7 of highland parts in the intermediate region 12. Therefore, the rigidity is improved by increasing the body thickness of the tread 5 in the part where the projection part 13 is formed, and the ground contact pressure of the part is increased, and the drag in the intermediate region 12 is prevented, and the eccentric abrasion is prevented. |
