| 摘要 |
PROBLEM TO BE SOLVED: To provide a pneumatic tire suppressing the rotations of a bead core when inner pressure is applied, capable of adding sufficient locking force to an end portion of a carcass ply, and improving durability.SOLUTION: A pneumatic tire T includes: a bead core 11; and a carcass ply 4 wound up from the outside in a tire axial direction to the inside around the bead core 11. A cross-sectional shape of the bead core 11 is a polygon having a bottom side 11c and a tire axial direction inner side 11a which makes an angle &thetas; within 90° with the bottom side 11c. The bead core 11 is divided into an inner core 111 and an outer core 112 by a division surface 113 extending from the tire axial direction inner side 11a. The carcass ply 4 is composed of a body portion 41 extending toward the bead core 11, and a wind-up portion 42 wound up around the bead core 11. An wind-up end 42E is put between the inner core 111 and the outer core 112 from the inside in the tire axial direction to the outside. |
