| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of improving abrasion resistance and wet performance. SOLUTION: A block 5 having a tread 7 divided by a longitudinal groove 3 and a lateral groove 4 and a parallelogram as seen in a plan view and a side wall surface 8 extending inward in the radial direction from the edge 7e of the tread is provided at a tread 2. The tread 7 of the block 5 includes a base 7a extending in an optional direction in the block linearly or in a constant width making contact with a virtual tread surface Vt formed of a curved surface separated by a distance equal to the maximum thickness H of the block and chamfering type curved surfaces 7b formed at both sides of the base 7a and positioned inside the radial direction rather than the virtual tread surface Vt and extending while gradually increasing the distance with the virtual tread surface Vt to the edge 7e of the tread from the base 7a outside the radial direction from a virtual groove bottom surface Vg continued to the deepest part 3Bt of the longitudinal groove 3. The edge 7e of the tread is formed at a position separated inside the radial direction by a distance (h) of 5-40% of the maximum thickness H of the block from the virtual tread surface Vt. COPYRIGHT: (C)2009,JPO&INPIT |
