| 摘要 |
<p>PURPOSE:To reduce road noise by providing a rubber reinforcing layer extending radially outward inside a carcass on the side of an inner cavity of a tire in a bead part, and establishing the rubber reinforcing layer to be fixed times as high as height at the maximum width of the tire. CONSTITUTION:Carcass 8 formed of organic fiber cord turns around a bead core 2 to form a turning back part 6B, and a tire bead part 3 having a belt 7 arranged on the radial outside of the carcass 6 is provided with a rubber reinforcing layer 9 inside the carcass 6 opposite to an inner cavity 8 of the tire. The rubber reinforcing layer 9 is thicker in layer thickness at a central part and decreases its thickness toward an inside and an outside in a radial direction to form a crescent-shape. The height h1 of the rubber reinforcing layer is set to be 0.4 to 1.00 times as high as height at the maximum width of the tire.</p> |
