| 摘要 |
PURPOSE: A heavy load radial tire is provided to improve the endurance of a bead by reducing separation among an edge part of a chafer, the chafer, and a carcass for reinforcing a bead part. CONSTITUTION: A heavy load radial tire improving the endurance of a bead is composed of a tread(1); a sidewall(2); and a bead part(3). The bead part comprises a bead core(30) wound with a plurality of wires, a bead filler(31) mounted on the upper portion of the bead core, a carcass(32) turned up to the bead core and the bead filler; a steel chafer(32) mounted to the outside of the carcass; and two nylon chafers(41,42) installed to the outer side of the steel chafer for reinforcing the bead part. The middle load radial tire improving the endurance of the bead inserts a rubber layer(51) into the two nylon chafers.
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