Patent ID: 9272582
Filing Date: 2016-03-01
CPC Classification: B60C,Y10T

Claim Text:
1. A pneumatic tire, comprising: a plurality of bead portions having a plurality of bead cores, each of the bead cores comprising a plurality of bead wires, wherein the plurality of bead wires is one of a plurality of steel wires and a plurality of organic fiber cords and includes a plurality of first bead wires and at least one second bead wire such that the at least one second bead wire is positioned in an innermost side portion of each of the bead cores in a tire radial direction, the second bead wire exhibits an elongation which is greater than an elongation of each of the first bead wires when the elongation of each of the bead wires is calculated by an equation, α=ΔL/L×100, where α represents the elongation, L represents a length of each of the bead wires under no load, and ΔL represents an elongation amount of each of the bead wires obtained when a same unit load is applied to each of the bead wires, and the second bead wire satisfies a difference in elongation which is less than or equal to 20%, when the difference is calculated by an equation, β=(α2−α1)/α2×100, where β represents the difference in elongation, α1 represents the elongation of each of the first bead wires, and α2 represents the elongation of the second bead wire.