| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire realizing both of low-frequency load noise reducing effect and operating stability improving effect. SOLUTION: This pneumatic tire is provided with one layer or more of carcass layer 10 wound back at both ends thereof by a pair of annular beads 1a, and a main body part 11 between the beads 1a of the carcass layer 10 is formed at a cord angleθ1 of 85-90°between the cord and the tire circumferential direction. A part 12B, which is arranged adjacent to a bead filler, of the wound back part 12 of the carcass layer 10 has an inclined part, in which the cord angleθ3 is maintained constant or changed within a range of 30-85°, and a primary resonance frequency to be measured on the basis of the axial force response in the vertical direction in response to the vibration by a hammer to be applied to a tire loaded with a heavy load in the air filling condition is set at 105 Hz or less. COPYRIGHT: (C)2003,JPO
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