| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire capable of improving durability not only under low internal pressure but also under high internal pressure. SOLUTION: In the pneumatic tire, at least one carcass layer 4 is stretched between a pair of right and left bead parts 3. A plurality of belt layers 7 are arranged on the outer peripheral side of the carcass layer 4 in a tread part 1, and at least one belt reinforcing layer 8 is arranged on the outer peripheral side of the belt layer 7. A cap compound layer 11 is arranged on the outer peripheral side of the belt layer 7 and the belt reinforcing layer 8, and bead fillers 6 are arranged on the outer peripheral sides of bead cores 5 in the respective bead parts 3. A relationship between height A in the tire radial direction in a region having the cap compound layer 11, a distance F in the tire radial direction from the inner peripheral end of the cap compound layer 11 to the outer peripheral end of the bead filler 6 and tire cross sectional height SH, is set to A/SH≤0.3, F/SH≥0.45 and (A+F)/SH≥0.75. JIS hardness of the bead filler 6 is set to 90 or more. COPYRIGHT: (C)2008,JPO&INPIT
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