| 摘要 |
PROBLEM TO BE SOLVED: To exhibit an excellent durability of a bead portion even though a rim flange height is lowered. SOLUTION: In a radial tire that can be applied to a standardized rim 2 equipped with a rim flange 8 which continuously protrudes outside in the width direction of a bead sheet 6, a rim flange protruding outwards in the radius direction with a cable bead 3 buried in a tire bead part 1, and its ply rating is 32 or move, a relative relationship between the outside diameter Do of ply rating X and cable bead and an outside curve starting edge diameter Dr and rim flange height Fh is made to be (Do-Dr)/Fh<=8.55X-0.79.
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