Tire

A tire, comprising:

• a tread portion comprising a center main groove, an outer main groove, and a lug groove, the center main groove being provided at a position closest to a tire equatorial plane and extending in a tire circumferential direction without crossing the tire equatorial plane, the outer main groove being provided on an outer side in a tire width direction of the center main groove and extending in the tire circumferential direction without crossing the tire equatorial plane, the lug groove extending in a direction intersecting with the center main groove and the outer main groove;
• the lug groove inclines toward one side in the tire circumferential direction and does not incline toward an other side in the tire circumferential direction;
• the center main groove having a zigzag shape in which a first linear portion and a second linear portion having mutually different inclination angles in the tire width direction with respect to the tire circumferential direction are alternately connected;
• the first linear portion and the second linear portion incline relative to the tire circumferential direction;
• the outer main groove having a zigzag shape in which a long linear portion and a short linear portion having mutually different inclination angles in the tire width direction with respect to the tire circumferential direction and having different tire circumferential direction lengths are alternately connected, the long linear portion and the short linear portion being provided with a bending point of the zigzag shape as a boundary therebetween;
• an extension line as an extension of a groove center line of the lug groove intersecting with the short linear portion in the zigzag shape of the outer main groove;
• a ratio of a tire circumferential length of the first linear portion to a tire circumferential length of one period of the zigzag shape of the center main groove being 0.40 or more and 0.60 or less;
• a ratio of the tire circumferential length of the long linear portion to a tire circumferential length of one period of the zigzag shape of the outer main groove being 0.45 or more and 0.75 or less;
• a ratio of the tire circumferential length of the one period of the zigzag shape of the outer main groove to the tire circumferential length of the one period of the zigzag shape of the center main groove being 0.90 or more and 1.20 or less;
• the outer main groove including an outer main groove on one side of the tread portion in the tire width direction and an outer main groove on an other side of the tread portion in the tire width direction;
• the lug groove continuously extends from the outer main groove on the one side of the tread portion in the tire width direction to the outer main groove on the other side of the tread portion in the tire width direction across the tire equatorial plane;
• a step portion being provided between groove opening end portions of the center main groove to a tread surface and a groove bottom;
• both of groove walls in the tire width direction of the center main groove radially inward of the step portion each having the zigzag shape in the tire circumferential direction;
• and
• both of groove walls in the tire width direction of the center main groove radially outward of the step portion each having the zigzag shape in the tire circumferential direction;
• wherein
• all of the short linear portions intersect the lug groove or an other lug groove and all of the long linear portions do not intersect any lug grooves.

A tire, comprising:

• a tread portion comprising a center main groove, an outer main groove, and a lug groove, the center main groove being provided at a position closest to a tire equatorial plane and extending in a tire circumferential direction without crossing the tire equatorial plane, the outer main groove being provided on an outer side in a tire width direction of the center main groove and extending in the tire circumferential direction without crossing the tire equatorial plane, the lug groove extending in a direction intersecting with the center main groove and the outer main groove;
• the center main groove having a zigzag shape in which a first linear portion and a second linear portion having mutually different inclination angles in the tire width direction with respect to the tire circumferential direction are alternately connected;
• the first linear portion and the second linear portion incline relative to the tire circumferential direction;
• the outer main groove having a zigzag shape in which a long linear portion and a short linear portion having mutually different inclination angles in the tire width direction with respect to the tire circumferential direction and having different tire circumferential direction lengths are alternately connected, the long linear portion and the short linear portion being provided with a bending point of the zigzag shape as a boundary therebetween;
• an extension line as an extension of a groove center line of the lug groove intersecting with the short linear portion in the zigzag shape of the outer main groove;
• a ratio of a tire circumferential length of the first linear portion to a tire circumferential length of one period of the zigzag shape of the center main groove being 0.40 or more and 0.60 or less;
• a ratio of the tire circumferential length of the long linear portion to a tire circumferential length of one period of the zigzag shape of the outer main groove being 0.45 or more and 0.75 or less;
• a ratio of the tire circumferential length of the one period of the zigzag shape of the outer main groove to the tire circumferential length of the one period of the zigzag shape of the center main groove being 0.90 or more and 1.20 or less;
• wherein the outer main groove includes an outer main groove on one side of the tire equatorial plane and an outer main groove on an other side of the tire equatorial plane;
• each of a plurality of the lug grooves extends from the outer main groove on the one side of the tire equatorial plane to the outer main groove on the other side of the tire equatorial plane, crossing the tire equatorial plane;
• a ratio of a tire circumferential length between an opening position of each of the plurality of lug grooves to the outer main groove on the one side of the tire equatorial plane and an opening position of each of the plurality of lug grooves to the outer main groove on the other side of the tire equatorial plane to a width of the tread portion is 0.40 or more and 0.60 or less;
• a step portion being provided between groove opening end portions of the center main groove to a tread surface and a groove bottom;
• both of groove walls in the tire width direction of the center main groove radially inward of the step portion each having the zigzag shape in the tire circumferential direction;
• and
• both of groove walls in the tire width direction of the center main groove radially outward of the step portion each having the zigzag shape in the tire circumferential direction;
• wherein
• all of the short linear portions intersect the lug groove or an other lug groove and all of the long linear portions do not intersect any lug grooves.