| 摘要 |
PURPOSE:To improve durability of a bead part and increase a critical speed for causing generation of standing wave by setting the equatorial height of a belt layer larger than an outer end height, while setting a belt camber amount which is a difference between those heights to have a specified rate in relation to a belt width. CONSTITUTION:An equatorial height H1 from a bead bottom surface in a radial direction in an equatorial point P1 where the radial direction inner surface E of a belt layer 10 crosses a tire equatorial surface CO, is set larger than the height of a point at the outer most end, in a tire axial direction, in an inner surface E, namely, an outer end height H2 which is a height in a radial direction in the outer end point P2 of the belt 10. Further, a belt camber amount H which is a difference between the equatorial height H1 and the outer end height H2, is set to more than 6% of a belt width W which is the length of a tire in its axial direction between the outer end points P2. In addition, a carcass is curved along the inner surface E, and a curvature radius R1 passing through the inner surface F of the central line is set smaller in comparison with conventional curvature radii R1a, R1b. |
