| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire having excellent wear resistance and high resistance against cutting, chipping, and heat as well as good appearance after wear. SOLUTION: This pneumatic tire includes a tread part consisting of a three-layer structure of a cap A, a cap B and an under C from a tire surface; rubber composition which constitutes the cap A, comprising single natural rubber or ablend of natural rubber or diene-based rubber; the rubber composition constituting the cap B, comprising of sulfur a pts.wt, b pts.wt. of compounding agent B indicated by the formula R<SB>2</SB>N-(C=S)-S-S-(CH<SB>2</SB>)x-S-S-(C=S)-NR<SB>2</SB>, and a sum of at least one of sulfenamide-based vulcanizing accelerator, c pts.wt., to 100 pts.wt. rubber composition comprising natural rubber and/or diene-based rubber and a, b and c simultaneously satisfy a relation of b≥0.2, 1.5≤a+b/2≤2.5, 0.5≤c/(a+b/2)≤0.9; and the rubber composition constituting the under C contains the blend of the single natural rubber or the natural rubber and the diene-based rubber. COPYRIGHT: (C)2005,JPO&NCIPI
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