| 摘要 |
At least two circumferential main grooves (61, 62) and three land portions (63, 64, 65) are formed in a tread portion of a pneumatic tire (1) on each side of a tire equatorial plane. In a cross section in a tire meridian direction of the pneumatic tire (1), profile lines of the land portions (63, 64, 65) form arcs, and extension lines of profile lines of adjacent land portions (63, 64, and 64, 65) intersect with inflection points (Pa, Pb) in the circumferential main grooves (61, 62). Tensile strength of a reinforcing layer (8) in areas of the land portions (63, 64, 65) is larger than that in an area of the circumferential main grooves (61, 62) having the inflection points (Pa, Pb).
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