| 摘要 |
PROBLEM TO BE SOLVED: To improve ride comfort and stability in car driving while lightening a radial tire in a pneumatic radial tire for passenger cars, using stranded steel cords for a carcass layer. SOLUTION: The belt layer 7 of at least one layer is constituted such that steel monofilaments M of 0.2 to 0.5 mm in strand diameter dm are arranged tilted to a tire peripheral direction, and the ratio dr/dm of the rubber interval between the steel monofilaments M and the strand diameter dm is made as follows: If 0.2 mm≤dm<0.3 mm, 0.18≤dr/dm≤1.85, if 0.3 mm≤dm<0.4 mm, 0.76≤dr/dm≤2.31, if 0.4 mm≤dm≤0.5 mm, 1.36≤dr/dm≤2.60. COPYRIGHT: (C)2004,JPO
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