Patent ID: 8893755
Filing Date: 2014-11-25
Classification: B60C

Abstract:
1. A pneumatic tire comprising a tread surface which, when viewed as a meridian cross-section, is formed having a profile with a plurality of differing curvature radii, wherein: in a state where the pneumatic tire is assembled on a regular rim and is inflated to an inner pressure that is 5% of a regular inner pressure, when a curvature radius of a center portion arc located on a centermost side in a tire width direction of the tread surface is defined as TR K K a tread portion is formed from tread portion rubber comprising a cap tread forming the tread surface and an under tread located inward of the cap tread in the tire radial direction; wherein the cap tread is formed from an inner side cap tread located on an inner side in the tire width direction and an outer side cap tread that is continuous with the inner side cap tread and is located on an outer side in the tire width direction; when a width from the equatorial plane to an end of the inner side cap tread in the tire width direction is defined as LC, KC, as derived from the width LC and the developed tread width TDW in formula (3) below, satisfies 0.9K a JIS A hardness of the inner side cap tread at room temperature is 63 or greater but 75 or less, and a JIS A hardness of the outer side cap tread at room temperature is 3 or greater but 15 or less lower than the JIS A hardness of the inner side cap tread at room temperature: