Abstract: In a tire, a main groove is formed in a step shape including circumferential extending portions extending in a circumferential direction at positions where positions in a width direction differ. Inclination directions of a second lug groove and a shoulder lug groove in the circumferential direction with respect to the width direction are opposite to one another. In the second lug grooves, two types of the second lug grooves having differentinclination angles with respect to the width direction are alternately disposed. The second lug groove opens to the circumferential extending portion located close to the second lug groove among the circumferential extending portions included in respective center and shoulder main grooves formed in step shapes. A shoulder lug groove opens to the circumferential extending portion located close to the shoulder lug groove among the circumferential extending portions included in the shoulder main groove formed in the step shape.

Abstract: Regions on an outer side, in a radial direction, of maximum width positions of outer surfaces of sidewall portions of a pneumatic tire have indications formed as protrusion portions protruding from the outer surface of a corresponding one of the side wall portions by 0.8 mm or more and depicting an alphanumeric, a pattern, or a symbol, the number of indications being N, an angle ? between one end and another end of each of the indications in the circumferential direction about a tire axis satisfies 30°???150°, the indications are arranged in the sidewall portions at an interval of (360°/N)±20°, and the indications in one of the sidewall portions on one side and the indications in the other one of the sidewall portions are positioned shifted from each other in the circumferential direction, with a shift angle about the tire axis between the indications being in a range of (180°/N)±20°.

Abstract: Regions on an outer side, in a radial direction, of maximum width positions of outer surfaces of sidewall portions of a pneumatic tire have indications formed as protrusion portions protruding from the outer surface of a corresponding one of the side wall portions by 0.8 mm or more and depicting an alphanumeric, a pattern, or a symbol, the number of indications being N, an angle ? between one end and another end of each of the indications in the circumferential direction about a tire axis satisfies 30°???150°, the indications are arranged in the sidewall portions at an interval of (360°/N)±20°, and the indications in one of the sidewall portions on one side and the indications in the other one of the sidewall portions are positioned shifted from each other in the circumferential direction, with a shift angle about the tire axis between the indications being in a range of (180°/N)±20°.

Abstract: Provided is a pneumatic tire having snow performances which are capable of being enhanced without sacrificing its running performance on dry road surfaces. A pneumatic tire of the invention includes two first main grooves, a plurality lateral grooves and a plurality of sipes in a tread part. In the pneumatic tire, a groove wall surface, of each first main groove, closer to a tire equatorial line is formed so as to cyclically repeat, in the tire circumferential direction, a change in an inclination angle of the groove wall surface to a direction normal to a tread, the change being a gradual increase from a minimum value of 0° to 15° to a maximum value of 15° to 45°. In places where the inclination angel of the groove wall surface, of the first main groove, closer to the tire equatorial line, is at its maximum, no lateral grooves communicate with the first main groove, and in the places, the other groove wall surface, of the first main groove, closer to a corresponding contact end extends uninterruptedly.

Abstract: Provided is a pneumatic tire having snow performances which are capable of being enhanced without sacrificing its running performance on dry road surfaces. A pneumatic tire of the invention includes two first main grooves, a plurality lateral grooves and a plurality of sipes in a tread part. In the pneumatic tire, a groove wall surface, of each first main groove, closer to a tire equatorial line is formed so as to cyclically repeat, in the tire circumferential direction, a change in an inclination angle of the groove wall surface to a direction normal to a tread, the change being a gradual increase from a minimum value of 0° to 15° to a maximum value of 15° to 45°. In places where the inclination angel of the groove wall surface, of the first main groove, closer to the tire equatorial line, is at its maximum, no lateral grooves communicate with the first main groove, and in the places, the other groove wall surface, of the first main groove, closer to a corresponding contact end extends uninterruptedly.