| 摘要 |
<p>PURPOSE:To provide such a tire as making the extent of high bead durability manifestable even at a time when a stadard load and any heavier load than the former have acted. CONSTITUTION:Each value of respective 100% moduli of carcass rubber 8, bead apex rubber, side packing rubber, chafer rubber and sidewall rubber is set to be 20 to 60kgf/cm<2>, 20 to 60kgf/cm<2>, 10 to 45kgf/cm<2> and 10 to 45kgf/cm<2> respectively. In addition, each value of respective loss elastic moduli of the carcass rubber, the bead apex rubber, the side packing rubber, the chafer rubber and the sidewall rubber is set to those of less than 20kgf/cm<2>, 20kgf/cm<2>, 20kgf/ cm<2>, 15kgf/cm<2> and 15kgf/cm<2> respectively. In a bead area between both upper and lower limit lines, gaps d1 and d2 between carcass cords is set to be 1/4 to two times over a diameter D of each carcass cord.</p> |
