A pneumatic tire includes circumferential grooves aligned in a lateral direction and extending in a circumferential direction, lateral grooves aligned in the circumferential direction and extending to cross the circumferential direction, communicating at ends with the circumferential grooves and defining a block-shaped land portion between the circumferential grooves, two narrow grooves aligned in the lateral direction and extending in the circumferential direction, communicating at ends with a lateral groove and dividing the land portion defined by each of the circumferential grooves and each of the lateral grooves into small land portions, the narrow grooves having a smaller groove width than the circumferential grooves and being formed with a bent portion in an intermediate portion, the bent portion being disposed inward in the lateral direction, and bend points of the bent portions being disposed at positions offset from one another in the circumferential direction.

A tread surface of a pneumatic tire is configured so that, given an inner region inward from shoulder circumferential main grooves in a tire lateral direction, and outer regions outward from the shoulder circumferential main grooves in the tire lateral direction, blocks positioned in the inner region are defined into three or more small blocks by narrow grooves, and blocks positioned in the outer regions are defined into a number of small blocks by the narrow grooves, the number being at least one less than the number of small blocks defined in the blocks positioned in the inner region. The small blocks including frontmost portions of the blocks in a tire rotation direction are leading-side blocks, and the small blocks including backmost portions of the blocks in the tire rotation direction are trailing-side blocks. The leading-side blocks have a surface area that is less than that of the trailing-side blocks.

To provide a pneumatic tire capable of improving rut running performance. In a pneumatic tire according to an embodiment, a shoulder block provided in a shoulder region of a tread portion is provided with a plurality of sipes which are formed at intervals in a tire circumferential direction to extend in a tire width direction. In the plurality of sipes, a dimple is provided on an outside in the tire width direction in relation to each tire ground contact end in a communication state. The dimple includes a portion formed with a wide width from a connection portion with the sipe toward the outside in the tire width direction and maximum width portions of the plurality of dimples are disposed to be offset in the tire width direction.

In a pneumatic tire, a first shoulder block comprises at least one first shoulder circumferential groove which extends in a tire circumferential direction, the at least one first shoulder circumferential groove is respectively separated from a pair of first shoulder slits, a center block comprises at least one center circumferential groove which extends in the tire circumferential direction, and the at least one center circumferential groove is respectively contiguous with a pair of center slits.

In a pneumatic tire, a plurality of main grooves include at least one straight main groove for which end edges at a tread surface are respectively parallel to a tire circumferential direction, and at least one zigzag main groove for which end edges at the tread surface are respectively inclined with respect to the tire circumferential direction, the end edges at the tread surface of the at least one zigzag main groove include an inner end edge which is arranged toward an interior in a tire axial direction, and an outer end edge which is arranged toward an exterior in the tire axial direction, and an outwardmost location in the tire axial direction of the inner end edge is arranged toward the interior in the tire axial direction from an inwardmost location in the tire axial direction of the outer end edge.

A heavy truck tire tread is provided that has a rolling direction that is in a longitudinal direction of the tread. A circumferential sipe (20) is present and extends in the longitudinal direction completely around the tread. The circumferential sipe does not bound a sacrificial rib. A plurality of micro sipes (22) engage the circumferential sipe and are located on opposite sides of the circumferential sipe in the lateral direction. The micro sipes extend from the circumferential sipe so as to terminate within rubber of the tread at a terminal end.

A tire including: at least three circumferential grooves; a first shoulder portion defined by a circumferential groove and a ground contact end on one side in a width direction; a second shoulder portion defined by a circumferential groove and a ground contact end on the other side in the width direction; a first land portion located between the circumferential groove defining the first shoulder portion and a circumferential groove adjacent to the circumferential groove defining the first shoulder portion; a second land portion located between the circumferential groove defining the second shoulder portion and the circumferential groove adjacent to the circumferential groove defining the second shoulder portion; recesses extending to the first shoulder portion and the first land portion across the circumferential groove defining the first shoulder portion; and recesses extending to the second shoulder portion and the second land portion across the circumferential groove defining the second shoulder portion.

A pneumatic tire includes circumferential grooves aligned in a lateral direction and extending in a circumferential direction, lateral grooves aligned in the circumferential direction and extending to cross the circumferential direction, communicating at ends with the circumferential grooves and defining a block-shaped land portion between the circumferential grooves, two narrow grooves aligned in the lateral direction and extending in the circumferential direction, communicating at ends with a lateral groove and dividing the land portion defined by each of the circumferential grooves and each of the lateral grooves into small land portions, the narrow grooves having a smaller groove width than the circumferential grooves and being formed with a bent portion in an intermediate portion, the bent portion being disposed inward in the lateral direction, and bend points of the bent portions being disposed at positions offset from one another in the circumferential direction.

The tread pattern of the pneumatic tire includes an outer main groove, shoulder lug grooves, and vertical sipes. The outer main groove extends in the tire circumferential direction on an outer side of the tire centerline in the tire width direction. The shoulder lug grooves are spaced apart in the tire circumferential direction and provided in the shoulder land portion regions on an outer side of the outer main groove in the tire width direction, extend from the outer side in the tire width direction toward the outer main groove, are closed in a shoulder land portion region. Each of the vertical sipes has a narrower width than each of the shoulder lug grooves, crosses each of the shoulder lug grooves and extends in the tire circumferential direction. Each of the vertical sipes has a depth greater than a groove depth of each of the shoulder lug grooves.

A tire comprises a tread portion comprising a shoulder land region provided with shoulder lateral grooves and circumferential sipes connecting between the shoulder lateral grooves. The shoulder lateral grooves are each provided with a chamfer. The circumferential sipes are each spaced apart from an axially inner end of the shoulder land region by an axial distance of from 30% to 100% of an axial width of the shoulder land region. The depths of the circumferential sipes are equal to or greater than the groove depths of the shoulder lateral grooves.