A tire comprises a tread portion 2. The tread portion 2 includes a tread ground contacting surface (2s) and at least one main groove 3 recessed from the tread ground contacting surface (2s) and extending continuously in a tire circumferential direction. The main groove 3 has a first groove wall 11. The first groove wall is provided with a recessed portion 15 recessed outwardly in a groove width direction from a groove edge of the main groove 3 on the tread ground contacting surface. The recessed portion 15 is formed of groove wall rubber 8 having a complex elastic modulus larger than that of base rubber 7 forming a main portion of the tread ground contacting surface (2s).

A heavy-duty pneumatic tire includes a tread portion including a pair of shoulder land portions. At least one of the pair of shoulder land portions is provided with a narrow groove extending continuously in the tire circumferential direction to divide the shoulder land portion into a main portion and a sacrificial rib located outward in the tire axial direction. The sacrificial rib includes a root portion in a tire radial direction with an axial width Wr, a top surface in the tire radial direction with an axial width Ws, and a ratio Wr/Ws being equal to or more than 1.0. In the shoulder land portion, a shortest distance Lw between the narrow groove and a maximum thickness line that defines a maximum thickness of the shoulder land portion measured in a normal direction to a tire cavity surface is equal to or less than 5.0 mm.

A tread pattern of a pneumatic tire includes three or more circumferential main grooves extending in a tire circumferential direction, a plurality of lug grooves provided in a land portion defined by two circumferential main grooves, and a sipe provided between adjacent lug grooves. The sipe is a composite sipe having a two-dimensional portion and a three-dimensional portion. Among open ends on both sides of the lug groove, an open end on an identical side to an end portion of the sipe at which the two-dimensional portion is provided is provided with a raised bottom portion.

A tread pattern of a pneumatic tire includes two or more circumferential main grooves in a half region demarcated by the equatorial plane, and land portions defined by the circumferential main grooves. A center land portion closest among the land portions to the equatorial plane includes a center sipe extending in the width direction, the center sipe is a composite sipe including a two-dimensional portion and three-dimensional portions provided on both sides of the two-dimensional portion in the width direction, a middle land portion that is adjacent to an outer side of the center land portion in the width direction includes a middle sipe extending in the width direction, and the middle sipe is a composite sipe comprising a two-dimensional portion provided on an inner side in the width direction and a three-dimensional portion provided on an outer side of the two-dimensional portion in the width direction.

A pneumatic tire includes a land portion defined by two circumferential main grooves extending in the circumferential direction, lug grooves in the land portion, and a sipe between adjacent lug grooves. An outer side edge of the land portion in the width direction has a zigzag shape, and an inner side edge of the land portion in the width direction has a straight shape. The sipe extends continuously from the outer side edge to the inner side edge, and the sipe has a Z-shape with two bent portions, and a ratio of a distance in the width direction between a bent portion closer to a center line passing through a midpoint position of the land portion in the width direction and the center line to a width of the land portion in the width direction being 0 to 0.40.

A tread portion has a circumferential groove extending continuously and circumferentially. The circumferential groove has a groove bottom and a pair of groove walls radially extending from the groove bottom to a tread surface. The groove bottom includes groove bottom protruding portions protruding radially outwardly from a groove bottom reference surface parallel to the tread surface at a deepest position of a groove depth of the circumferential groove. Each of the groove bottom protruding portions is formed to be symmetrical about a center line of the circumferential groove in a plan view of the tread portion and has a first groove bottom surface extending radially. The first groove bottom surface includes a first surface portion on one side of the center line and a second surface portion on the other side. An angle between the first surface portion and the second surface portion is from 20° to 170°.

A tread pattern of a pneumatic tire includes three or more circumferential main grooves extending in a tire circumferential direction, a land portion defined by the circumferential main grooves, and a sipe provided in the land portion. At least one edge of edges on both sides of the land portion in a tire width direction is a zigzag edge. The zigzag edge has a zigzag shape with recesses/protrusions that has a position periodically changing in the tire width direction. The sipe is a composite sipe including a two-dimensional portion and a three-dimensional portion, and the three-dimensional portion is connected to the zigzag edge.

A tire can include a block having a recess. The recess can include a first opening on a tread side and a second opening on a side wall face side. The first opening can include a pair of first edges extending from a first vertex to the side wall face side so as to form a V-shaped edge on the tread. The second opening can include a pair of second edges that can extend from a second vertex on the side wall face, and can be connected to the pair of first edges at intersection points. One of the pair of second edges can include a second edge body that can extend on a straight line from the second vertex to the intersection point, and a second edge subsidiary portion that can be bent so as to widen the second opening.

A tire includes first and second laterally spaced sides and a tread interposed between the first and second sides. The tread includes a tread surface having at least one groove therein, the at least one groove including facing, first and second sidewalls separated by a groove bottom surface. A first pocket region of recessed serrations extends over at least a portion of the first sidewall and a second pocket region of recessed serrations extends over at least a portion of the second sidewall. The serrations of the first and second pocket regions are staggered in a circumferential direction relative to one another.

The tire includes a tread portion having circumferential grooves extending in a tire circumferential direction and land regions demarcated by the circumferential grooves. The circumferential grooves include a first circumferential groove and a second circumferential groove adjacent to the first circumferential groove and having a width larger than the first circumferential groove. The land regions include a first land region demarcated between the first circumferential groove and the second circumferential groove. The first land region has lateral grooves extending in a tire axial direction and lateral sipes extending in the tire axial direction and each having a width smaller than that of each of the lateral grooves. A total value of the widths of the lateral grooves and the lateral sipes connected to the second circumferential grooves is smaller than a total value of the widths of the lateral grooves and the lateral sipes connected to the first circumferential grooves.