A tire tread includes a middle rib formed by two circumferential main grooves extending along a tire circumferential direction, a first shoulder rib disposed axially outward from the center rib and one of the circumferential main grooves, and a second shoulder rib disposed axially outward from the center rib and the other of the two circumferential main grooves. The middle rib has a repeated group of three sipes: a first sipe being inclined radially inward a first angle relative to a radial direction, a second sipe being inclined radially inward a second angle relative to the radial direction, and a third sipe being inclined radially inward a third angle relative to the radial direction. The second angle is between −0.5 degrees and +0.5 degrees. The first and third angles are oppositely radially inclined to each other and the radial direction.

A heavy truck tire is provided that includes a casing with a central axis, and a rubber tread that has a first layer and a second layer. The first layer is located farther from the central axis in a radial direction than the second layer. The first layer has a lower max tan(δ) than a max tan(δ) of the second layer. The max tan(δ) of the first layer is from 0.06-0.15, and the max tan(δ) of the second layer is from 0.12-0.27. The tire also has a sculptural feature that reduces irregular wear.

A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction and a land portion defined by the circumferential main grooves. The land portion includes a through lug groove that passes through the land portion in the tire lateral direction and includes first and second chamfered portions formed on left and right edge portions of the through lug groove. The first chamfered portion opens at one end to one of the edge portions of the land portion and terminates at the other end at a central portion in the groove length direction of the through lug groove. The second chamfered portion opens at one end portion to one of the edge portions of the land portion and terminates at the other end portion at a central portion in the groove length direction of the through lug groove.

A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction and a land portion defined by the circumferential main grooves. The land portion includes a through lug groove that passes through the land portion in the tire lateral direction and includes first and second chamfered portions formed on left and right edge portions of the through lug groove. The first chamfered portion opens at one end to one of the edge portions of the land portion and terminates at the other end at a central portion in the groove length direction of the through lug groove. The second chamfered portion opens at one end portion to one of the edge portions of the land portion and terminates at the other end portion at a central portion in the groove length direction of the through lug groove.

A first and a second tread pattern portions P1 and P2 on each side of a tire equator (Co) are line symmetry except being circumferentially misaligned, and are each provided with oblique lateral grooves 3, inner and outer joint grooves 4 and 5 connecting between the circumferentially adjacent oblique lateral grooves 3, inner terminating grooves 7 disposed between the inner and outer joint grooves 4 and 5, outer terminating grooves 8 disposed between the outer joint grooves and a ground contact edge (TE), and center joint grooves 6 alternately connecting the oblique lateral grooves of the first and second tread pattern portions. The inner and outer joint grooves 4 and 5 and the inner and outer terminating grooves 7 and 8 are inclined to different directions from the oblique lateral grooves 3. The outer terminating grooves 8 extend on extended lines of the outer joint grooves 5.

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.

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.

A tire comprises a tread portion provided with zigzag circumferential grooves and lateral grooves so that hexagonal blocks are formed between the zigzag circumferential grooves. Corners of the hexagonal blocks adjacent to each other through the lateral grooves are partially chamfered to have chamfered parts, with respect to each of the lateral grooves, the chamfered part of the corner of the hexagonal block abutting on the lateral groove on one side in the tire circumferential direction is located in a different position in the longitudinal direction of the lateral groove than the chamfered part of the corner of the hexagonal block abutting on the lateral groove on the other side in the tire circumferential direction.

A tire comprises a tread portion provided with zigzag circumferential grooves and lateral grooves so that hexagonal blocks are formed between the zigzag circumferential grooves. Corners of the hexagonal blocks adjacent to each other through the lateral grooves are partially chamfered to have chamfered parts, with respect to each of the lateral grooves, the chamfered part of the corner of the hexagonal block abutting on the lateral groove on one side in the tire circumferential direction is located in a different position in the longitudinal direction of the lateral groove than the chamfered part of the corner of the hexagonal block abutting on the lateral groove on the other side in the tire circumferential direction.

A tire has a tread portion 2. The first middle land region 11 is provided with bend grooves 15 each having a first end 15a and a second end 15b. The first end 15a is connected to the first shoulder circumferential groove 5. The second end 15b is connected to one of the bend grooves 15 next in one of two opposite circumferential directions. Each bend groove 15 has two bent portions 16 and 17 at which the groove is bent. The bent angle θ1 at the first bent portion 16 is greater than the bent angle θ2 at the second bent portion 17.