Disclosed is a pneumatic tire including: in a tread surface of a tread portion, a pair of main grooves (center main groove and shoulder main groove) arranged side by side in a tire lateral direction and extending in a tire circumferential direction; land portions (middle land portion) defined by the main grooves; a plurality of lug grooves arranged side by side in the tire circumferential direction and bent and folded back, each of the lug grooves including one end communicating with the shoulder main groove, the other end terminating within the middle land portion, and a bending point in a middle of a path from one end to the other end; and sipes extending across the lug grooves, at least one side of the sipe with respect to the lug groove being formed in a zigzag shape.

In a pneumatic tire, an outer second land portion, a center land portion, and an inner second land portion have a road contact surface that partially bulges toward the outer side in a tire radial direction from a reference contour line of a tread profile in the cross-sectional view in the tire meridian direction. Additionally, a groove width Wg1 of an outer shoulder main groove, a groove width Wg3 of an inner center main groove, and a groove width Wg4 of an inner shoulder main groove have a relationship of Wg3<Wg1<Wg4, 1.05≤Wg1/Wg3≤1.25, and 1.10≤Wg4/Wg3≤1.30.

A pneumatic tire comprises a tread portion provided on each side of the tire equator with a middle land portion defined between a shoulder main groove and a crown main groove each extending continuously in the tire circumferential direction. The middle land portion is provided with axially inside middle lug grooves and axially outside middle lug grooves arranged alternately in the tire circumferential direction. The axially inside middle lug groove is connected to the crown main groove at an angle θ1 of from 20 to 45 degrees with respect to the tire circumferential direction and has an axially inner opened end and an axially outer closed end. The outside middle lug grooves is connected to the shoulder main groove at an angle θ2 of from 60 to 80 degrees with respect to the tire circumferential direction and has an axially outer open end and an axially inner closed end. The tread portion may be provided with a shoulder land portion comprising circumferential sipes, axial grooves terminating at the circumferential sipes, and a circumferentially continuous rib.

A pneumatic tire includes first and second main grooves, and first sipes and auxiliary grooves on second land portions between the first and second main grooves, the auxiliary grooves opening to the second main grooves and terminating in the second land portions. The auxiliary grooves bend at a bend point and include a first portion extending from an opening end to the bend point, and a second portion extending from the bend point to a terminating end. A groove width of the first portion gradually reduces from the opening end to the bend point. Second sipes have an end that opens to each of the second main grooves and another end that opens to each of the terminating ends. Third sipes have an end that opens to the first main grooves and another end that opens to the first portions. The sipes are parallel to each other.

A pneumatic tire comprises a tread portion 2 provided with shoulder axial grooves 10 extending from a shoulder main groove 3 to a tread edge Te while inclining to a first-side in the tire circumferential direction. The shoulder axial groove 10 has a first-side groove edge, a second-side groove edge, a first-side groove-sidewall 14 extending radially inward from the first-side groove edge 12, and a second-side groove-sidewall 15 extending radially inward from the second-side groove edge 13. The shoulder axial groove 10 has a part where the inclination angle β of the first-side groove-sidewall 14 with respect to a normal line passing through the first-side groove edge 12 perpendicularly to the tread surface 2s is more than the inclination angle α of the second-side groove-sidewall 15 with respect to a normal line passing through the second-side groove edge 13 perpendicularly to the tread surface 2s.

In a pneumatic tire, shoulder blocks are formed with one of two types of values for block width measured in the tire circumferential direction. A cross-sectional shape of a tread ground contact edge of the shoulder blocks with the smaller block width value when sectioned in a plan that includes a tire axial center is formed with a squared portion formed by a curved line having a radius of curvature of 10 mm or less, or is formed with a squared portion taper cut along a straight line having a length of 10 mm or less. A cross-sectional shape of a tread ground contact edge of the shoulder blocks with the larger block width value when sectioned in the plan that includes the tire axial center is formed with a rounded portion formed by a curved line having a radius of curvature of from 30 mm to 60 mm inclusive.

A pneumatic tire includes lug grooves in a tread surface of a shoulder land, the lug grooves crossing a circumferential direction and terminating at a first side within the shoulder land and passing through a contact edge at a second side; and a notch formed on an opening edge of the lug grooves, the notch being cutout from the tread surface cut radially inward. The lug grooves have a width decreasing from the first to the second side, an end position of the lug grooves is disposed from a main groove from 5% to 35% of a lateral dimension from the main groove to the ground contact edge, and a maximum groove width position is disposed from the main groove 40% or less of the lateral dimension from the main groove to the ground contact edge; and the notch has a width that increases from the first to the second side.

Provided is a tire including a tread portion. The tread portion can include three circumferential grooves and four land portions. The circumferential grooves can include two shoulder circumferential grooves and one crown circumferential groove. The land portions can include two shoulder land portions and two middle land portions. The two middle land portions can each include a circumferential sipe, a plurality of first middle lateral grooves, and a plurality of second middle lateral grooves. The two shoulder land portions can each include a plurality of shoulder lateral grooves extending from a tread end and terminating in the shoulder land portion.

A pneumatic tire includes a first main groove on the outer side in the vehicle width direction of the equatorial plane, a second main groove closer to the equatorial plane than the first main groove, a third main groove on the inner side in the vehicle width direction of the equatorial plane, a fourth main groove farther from the equatorial plane than the third main groove, a first narrow groove between the third and fourth main grooves, and a first groove portion extending in the width direction between the first narrow groove and the fourth main groove and opening at one end to the fourth main groove. A relationship between the first main groove width G1, the third main groove width G3, and the fourth main groove width G4 satisfies 1.05≤G1/G3≤1.25, 1.10≤G4/G3≤1.30, and G3<G1<G4.

The tire has a tread portion 2 comprising a plurality of main grooves and a first land portion 11 divided by the main grooves. The first land portion 11 comprises a plurality of first blocks 15 divided by first lateral grooves 14. The first lateral groove 14 is provided with a first tie bar 19 raising from a part of the groove bottom excluding its end portions in the tire axial direction. The first block 15 is provided with a first sipe 20 inclined with respect to the tire axial direction to the same orientation over its entire length from a first longitudinal edge 26 to a second longitudinal edges 27 of the block. The first sipe 20 is composed of a first portion 21 extending from the first longitudinal edge 26, a second portion 22 extending from the second longitudinal edge 27, and a third portion 23 between the first portion 21 and the second portion 22. The angle with respect to the tire axial direction of the third portion 23 is greater than the angles with respect to the tire axial direction of the first portion 21 and the second portion 22.