| 摘要 |
PURPOSE: A heavy-load tire with the improved bead durability is provided to improve the bead durability without distorting the structures of a bead part and a carcass wrapping it. CONSTITUTION: A heavy-load tire with the improved bead durability comprises a tread(1), a belted layer(2), a carcass(3), and a bead part(6). The belted layer is arranged inside the tread. The carcass serves as the tire frame. The bead part comprises a bead core(4) and a bead filler(5). The turned-up part(3a) of the carcass is formed from the double-topping rubber. The topping rubber for the adhesive force increase is arranged for the double-topping rubber. The double-topping rubber is arranged to increase the adhesive force of the bead part at both sides of the topping rubber of the carcass.
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