| 摘要 |
Provided is a pneumatic tire having a pair of annular bead cores embedded and arranged in bead portions; a carcass formed of at least one carcass ply including a body and a folded portion connected to the body, the body toroidally extending between the pair of the bead cores, the folded portion folded around the bead core; and a tread rubber arranged on outer side of the periphery of a crown region of the carcass, at least two laminated reinforcement layers with organic fiber over the bead core, and in the layer, one or more rubber-coated organic fiber cord is tilted to the center line of the bead core in a transverse section and is spirally coiled, in which in a cross section in a tire width direction, the bead core has a polygonal shape and includes at least one corner on the side of the body of the carcass ply, in which each organic fiber cord in an inner adjacent reinforcement layer with organic fiber and in an outer adjacent reinforcement layer with organic fiber over the bead core extends such that an organic fiber cord in the inner reinforcement layer with organic fiber and an organic fiber cord in the outer reinforcement layer with organic fiber intersect each other relative to the center line of the bead core in the transverse section, in which in the inner reinforcement layer with organic fiber of the adjacent reinforcement layers with organic fiber, the rubber-coated organic fiber cord is coiled with space at least partially in a tire circumferential direction such that the rubber-coated organic fiber cord does not overlap in the tire circumferential direction, and the outer reinforcement layer with organic fiber is arranged to cover at least a part of the space. |
