| 摘要 |
<p>PURPOSE:To increase cornering power even in a small steering angle area of a tire which has the tread provided with a land portion by forming arcwise chamfering areas, which are made up with the radii of curvature to become smaller from the crosswise center of the land portion to the ends, at crosswise ends of the land portion. CONSTITUTION:At crosswise both ends (except for a tread end) of a land portion 6 which is part of a land portion with a great width 3, chamfering areas 10, 11 are formed by rounding both edges in a cross direction of the land portion 6. The chamfering areas 10, 11 are respectively made up of the arcwise portions, two arcwise portions 12, 13 in Fig., which have different radii of curvature set apart in a cross direction. The arcwise portions 12, 13 are set so as to become smaller from the crosswise center of the land portion 6 to crosswise both ends: the radius P of curvature of the arcwise portion 12> the radius R of curvature of the arcwise portion 13. This allows not only maximum cornering force but also cornering power in a small steering angle area to be increased.</p> |
