Pneumatic tire

A pneumatic tire comprising a tread, a pair of sidewalls, a pair of clinches, a pair of beads, carcass, and a pair of load support layers, wherein

• each sidewall extends from an edge of the tread substantially inward in a radial direction,
• each clinch extends from an edge of the sidewall substantially inward in the radial direction,
• each bead is located inward of the clinch in an axial direction,
• each load support layer is located inward of the sidewall in the axial direction,
• the bead includes a core and an apex,
• the apex is located outward of the core in the radial direction
• the apex includes a main body, a first reinforcing portion, and a second reinforcing portion,
• the main body extends from the core substantially outward in the radial direction,
• the first reinforcing portion is located inward of the main body and the second reinforcing portion is located outward of the main body in the axial direction and each reinforcing portion extends long the main body,
• when a position on an outer surface of the tire at which position a height in the radial direction from a bead base line is 14 mm is defined as a first point P1, and a position on the outer surface of the tire at which position a height in the radial direction from the bead base line is 20 mm is defined as a second point P2,
• the main body and both reinforcing portions overlap each of the first point P1 and the second point P2 in the radial direction,
• wherein at said second point P2 the apex has a thickness ta, the first reinforcing portion has a thickness tu, and the second reinforcing portion has a thickness ts, such that the ratio of the sum (ts+tu) relative to the thickness ta is greater than or equal to 0.2 and less than or equal to 0.8,
• the carcass includes a ply,
• the ply is turned up around each core from inner side toward the outer side in the axial direction, due to this turned-up, a main portion and a pair of turned up portion are formed in the ply,
• both reinforcing portions are interposed between the main portion and the corresponding turn-up portion,
• a loss tangent of each reinforcing portion is equal to a loss tangent of the main body or less than the loss tangent of the main body, and is equal to a loss tangent of the load support layer or less than the loss tangent of the load support layer,
• a hardness of the reinforcing portion is equal to a hardness of the main body or greater than the hardness, and is equal to a hardness of the load support layer or greater than the hardness,
• when the loss tangent of one of the reinforcing portions is equal to the loss tangent of the main body, the hardness of said reinforcing portion is greater than the hardness of the main body, and
• when the hardness of one of the reinforcing portions is equal to the hardness of the main body, the loss tangent of said reinforcing portion is less than the loss tangent of the main body.