作者: Kuninobu Kadota
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摘要: In a pneumatic radial tire for heavy duty vehicles having pair of bead portions, each the portions comprises at least first, second and third chafer plies disposed around carcass. The ply has cord angle larger than those first plies. have height h 1 measured in direction from laterally outward radially outermost end to heel point which base portion flange rim mounted thereon are intersected with other, 2 3 , respectively. carcas fold-back H thereof point, heights being selected within ranges defined by following equations, ##EQU1## is taller other .