| 摘要 |
<p>PURPOSE:To aim at improvement in a feeling of driving comfortableness and reduction in rolling resistance, by making the maximum width of a tire at the time of charging of normal internal pressure narrower at the time of zero in the internal pressure, while setting the carcass turnover length of a bead part to the specified one, and constituting it to be covered with rubber lower in hardness than a bead feeler. CONSTITUTION:The maximum width W1 of a tire at the time of its internal pressure charged is constituted so as to become smaller than the maximum width W2 of the tire. Outward extending length (h) in a tire radial direction of a turnover part 3a in a bead core 4 part of a carcass 3 is set to a range of 10-30% of tire section height H, while a tip end of the carcass turnover part 3a is covered with covering rubber lower in hardness than that of a bead feeler 5 toward the inward from the outward of the tire radial direction. With this constitution, separation of the turnover part from occurring and, what is more, improvement in a feeling of comfortableness and reduction in rolling resistance both are well promoted.</p> |
