| 摘要 |
PROBLEM TO BE SOLVED: To reduce the rolling resistance. SOLUTION: A side wall rubber 3G is formed of a low exothermic rubber 10 of the loss factor smaller than that of a tread rubber 2G. In a meridian section of a tire at a reference low internal pressure condition with the pressure of 10 kPa applied thereto, a lower area 3L of the side wall has a projecting area 20 to form a folded part 21 so that an outline curve K easily folds the side wall part 3 in a range formed of the low exothermic rubber 10.
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