Patent ID: 7762298

Claim:
A pneumatic tire comprising: a tread pattern wherein at least one circumferential groove continuously extending in a circumferential direction is formed in at least a first half part of a treading face within a range of 10-30% of a width of the treading face from an end of the treading face and a plurality of curvedly slant grooves arranged at intervals in the circumferential direction and each extending from the at least one circumferential groove toward a side of a central part of the treading face so as to make an angle at an acute angle side with respect to the circumferential direction that gradually becomes smaller away from the circumferential groove, wherein, a land row consisting of tapered land portions is defined between the circumferentially adjoining curvedly slant grooves and having a width that gradually decreases toward the side of the central part of the treading face, and sipes that linearly extend at two large and small inclination angles with respect to the circumferential direction without crossing with each other are alternately arranged in the circumferential direction, a first type of the sipes has an angle at the acute angle side with respect to the circumferential direction of 75-90° and a second type of the sipes has an angle at the acute angle side of 30-60°, wherein a first end of each of the first type of sipes opens to one of the curvedly slant grooves and a second end of each of the first type of sipe opens to the at least one circumferential groove or an adjoining curvedly slant groove, wherein a first end of each of the second type of sipes opens to one of the curvedly slant grooves and a second end of each of the second type of sipes opens to an adjoining curvedly slant groove, and wherein a first end of one of the first type of sipes connects with a first end of one of the second type of sipes at a point where the one first type of sipe and the one second type of sipe open to one of the curvedly slant grooves.