Pneumatic tire

A pneumatic tire comprising:

• a pair of bead portions disposed on both sides of a tire equatorial plane in a tire lateral direction;
• and
• a bead core provided to each of the pair of bead portions and formed into a hexagonal shape as viewed in a tire meridian cross section;
• the pneumatic tire being mounted to a 15°-tapered specified rim,
• the pair of bead portions comprising a portion inward in a tire radial direction of an extension line of an inner circumferential surface of the hexagonal shape of the bead core, the extension line extending in the tire lateral direction, that is positioned outward in the tire lateral direction of an imaginary line that passes through an intersection point between the extension line and a tire inner surface and extends inward in the tire radial direction from the extension line at an angle perpendicular to the extension line,
• an angle α formed by the imaginary line and a line segment passing through an intersection point between the tire inner surface and an engaging portion that serves as the inner circumferential surface of the pair of bead portions and engages with the specified rim and the intersection point between the extension line and the tire inner surface being from 10° to 25°,
• an angle θ of the extension line with respect to a straight line perpendicular to the tire equatorial plane being 13° to 17°,
• a carcass being turned back outward in the tire lateral direction along the bead core, and
• an axially innermost point in the tire lateral direction of the carcass that is radially inward of a maximum tire section width position being positioned in a region between the extension line of the inner circumferential surface of the hexagonal shape of the bead core and an extension line of the outer circumferential surface of the hexagonal shape of the bead core.