| CPC B60C 15/0603 (2013.01) [B29D 30/0606 (2013.01); B60C 11/0332 (2013.01); B60C 15/0036 (2013.01); B60C 2013/007 (2013.01); B60C 2015/061 (2013.01)] | 4 Claims |
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1. A tire having a speed range from W to Y in a speed rating chart, where W is 270 km/h and Y is 300 km/h, the tire comprising:
a tread configured to come into contact with a road surface;
a pair of sidewalls continuous with ends of the tread, the pair of sidewalls disposed inwardly of the tread in a radial direction;
a pair of beads disposed inwardly of the sidewalls in the radial direction; and
a carcass extending on and between one of the beads and another of the beads in portions inward of the tread and the pair of sidewalls,
wherein the beads include cores and apexes disposed outwardly of the cores in the radial direction, and
wherein, in a normal state in which the tire is mounted on a normal rim, an internal pressure is adjusted to a normal internal pressure, and no load is applied:
a ratio of a distance in the radial direction from a bead base line to an outer end of each said apex, to a tire cross-sectional height, is not less than 20% and not greater than 30%, and
an angle of a line segment connecting between the outer end of each said apex and a center of a width, in an axial direction, of a contact surface of the apex at which the apex is in contact with a corresponding one of the cores, relative to the bead base line, is not less than 45° and not greater than 55°,
wherein a vertical deflection B100 and a ground contact area A100, and a vertical deflection B73 and a ground contact area A73 satisfy the following Equation (1), where B100 and A100 represent the vertical deflection and the ground contact area, respectively, obtained when a first load represented by a load index is applied as a vertical load to the tire in the normal state, and B73 and A73 represent the vertical deflection and the ground contact area, respectively, obtained when a second load that is 73% of the load represented by the load index is applied as a vertical load to the tire in the normal state:
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