Patent ID: 8443855

Claim:
A pneumatic tire for which a tire rotational direction is specified, comprising: a straight main groove arranged in a center area of a tread in a tire circumferential direction; a wave-shaped main groove arranged in the tire circumferential direction at each of two sides of the straight main groove with a rib-shaped land section interposed between the straight main groove and the wave-shaped main groove, the wave-shaped main groove being formed by connecting a plurality of arc-shaped grooves in series in the tire circumferential direction, and each arc-shaped groove curving to have a convex shape protruding toward the inner side of the tire; and a plurality of diagonal grooves arranged in each shoulder area ranging from its corresponding one of the wave-shaped main grooves toward the outer side of the tire, each diagonal groove extending obliquely outward from a connecting part between corresponding two arc-shaped grooves to a direction reverse to the tire rotational direction, wherein each diagonal groove is formed to have a convex arc shape protruding toward the outer side of the tire, an extending end portion of each diagonal groove terminates in the shoulder area, each shoulder area is provided with a non-block pattern in which the land section continues in the tire circumferential direction, and in each shoulder area, arc-shaped auxiliary diagonal grooves are arranged, a starting end of each auxiliary diagonal groove being located in an area between the corresponding two of the diagonal grooves adjacent to each other in the tire circumferential direction, the auxiliary diagonal groove extending obliquely outward to an end portion of the shoulder area in the direction reverse to the tire rotational direction, and each auxiliary diagonal groove curving to have a convex arc shape protruding in a direction opposite to the direction in which the corresponding diagonal grooves protrude, thereby, the shoulder area is provided with a non-block pattern in which the land section continues in a zigzag fashion in the tire width and circumferential directions.