| 摘要 |
A pneumatic tire (1) comprises a tread portion (2), a pair of sidewall portions (3), a pair of bead portions (4), a pair of bead cores (5) each being disposed in the bead portion, the bead core (5) comprising an annular core (9) extending in the tire circumferential direction and a sheath (10) including a plurality of sheath wires (10a) each extending helically around the annular core, a carcass (6) comprising a carcass ply (6A,6B) extending between the bead portions (4) and turned up around the bead core in each bead portion, wherein one of the bead cores is reverse to the other bead core with respect to the helical direction of the sheath wires (10a). |
