| 摘要 |
PROBLEM TO BE SOLVED: To improve durability while achieving lightening. SOLUTION: A contour Y of a tire outer surface between a tire cross sectional width point P1 and a separating point P3 from a flange includes a protrusive part 10 protruding more than a reference arc RO and a recessed part 11 recessed more than thereof. A height h1 of a maximum protruding point Q1 of the protrusive part 10 is 0.85 to 1.15 times a height h of a carcass folded back part outer edge 6e, and a height h2 of a maximum recessed point Q2 is smaller than the height h1 and 0.30 to 0.90 times the height h. A maximum protruding height q1 and a maximum recessed depth q2 are set each 0.001 to 0.040 times a tire cross sectional width W.
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