| 摘要 |
PROBLEM TO BE SOLVED: To simplify a constitution of an inner bead part as compared with a constitution of an outer bead part within a range that the inner bead part formed on a partition wall part is not removed from a rim in a pneumatic tire in which a tire air chamber is divided into three to a main air chamber at a center in a tire width direction and sub-air chambers at both sides in the tire width direction by a pair of left and right partition wall parts formed at the inner side of the tire. SOLUTION: In the pneumatic tire 10, the partition wall part 24 extending from a tire inner side surface 17 of a tire shoulder part 21 to an inner side in a tire radial direction and having the tire radial direction inner side end contacted with the rim 12 is provided. A cross section area of the inner bead core 31 provided on the inner bead part 25 of the partition wall part 24 is set smaller than a cross section area of an outer bead core 18 provided on an outer bead part 16 of a tire side part 20. More preferably, the cross section area S mm<SP>2</SP>of the inner bead core is desirably 4 mm<SP>2</SP><S mm<SP>2</SP><20 mm<SP>2</SP>. COPYRIGHT: (C)2007,JPO&INPIT
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