In regions, divided by the tire equator, on both sides of the tread surface of a tire, the tire includes a grip area along the entire circumference of the tread, the grip area including a plurality of recessed lines, with a shape recessed toward an inner side of the tire from the outline of the tread surface, that extend from the tread edge side in a direction inclined relative to the tire equator and are arrayed in parallel, and a plurality of sipes that extend toward the tire equator in a direction inclined relative to the tire equator, starting in the grip area and terminating before the tire equator. The negative ratio in the grip area is higher than the negative ratio closer to the tire equator than the grip area.

Provided is a pneumatic tire with wet steering stability performance and dry steering stability performance enhanced in a well-balanced manner.

A dimple group is composed of a plurality of dimples (100 to 104) disposed at intervals and aligned in a tire circumferential direction. When the minimum center-to-center distance between different dimples (100, 102) in an identical dimple group is defined as K and the minimum center-to-center distance between dimples (104, 100) in different dimple groups is defined as L, the ratio L/K is 3.5 or more and 10.0 or less and the minimum center-to-center distance L is 20 mm or more and equal to or less than a ground contact length.

Provided is a tire including a tread portion. The tread portion can include a first shoulder land portion. The first shoulder land portion 11 can include a shoulder lateral groove and a shoulder sipe. The shoulder lateral groove can include a minimal portion in which a groove width of the shoulder lateral groove is smallest, between a ground contact surface and a groove bottom of the shoulder lateral groove. A width of the shoulder sipe may not be greater than 1.5 mm. An internal groove having a groove width greater than the width of the shoulder sipe can be continuously disposed inwardly of the shoulder sipe in a tire radial direction. The internal groove can be disposed inwardly of the minimal portion and outwardly of the groove bottom of the shoulder lateral groove, in the tire radial direction.

Provided is pneumatic tire in which a land portion includes a width direction sipe extending in a tread width direction, the width direction sipe includes, in a cross section along a depth direction, a linear portion extending from an opening of the width direction sipe toward a bottom of the width direction sipe, and a bent portion connected to the linear portion, bending and extending from a connecting portion with the linear portion to the bottom of the width direction sipe, and the linear portion of the width direction sipe has a length in the depth direction increasing as the linear portion extends from a center portion of the width direction sipe in the tread width direction toward an end portion in the tread width direction.

A pneumatic tire includes a circumferential main groove extending in a tire circumferential direction, a block, which is a land portion defined by the circumferential main groove, a sipe extending through the block in a tire width direction, and chamfered portions provided in the sipe. A total length of lengths of the chamfered portions in the tire width direction is less than 70% of a length of the sipe in the tire width direction.

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 tyre includes a tread portion being provided with a longitudinal groove and a land portion being adjacent to the longitudinal groove. The land portion has a ground contact surface defined between a first circumferential edge located on the longitudinal groove side and a second circumferential edge located on an opposite side to the first circumferential edge. The land portion is provided with first lateral grooves and sipes. The first lateral grooves extend from the first circumferential edge and having inner ends thereof terminating within the land portion. The first lateral grooves are provided with tie-bars on the respective inner ends side, the tie-bars having lengths smaller than lengths of the respective first lateral grooves. The sipes include first sipe elements extending form the second circumferential edge to the respective first lateral grooves and second sipe elements extending on the respective tie-bars.

A pneumatic tire in which a plurality of sipes 20 are formed in land sections of a tread and at least one of end parts in an extending direction of each sipe 20 is an end part 21 in the land section that is blocked in the land section, in which holes 22 separated from the sipes 20 are formed on line segments L connecting the end parts 21 in the land section of adjacent two sipes 20 to each other, and the hole 22 has a circular shape or an elliptical shape in plan view, a diameter of which becomes smaller as coming toward a deeper position.

Tread (1) for a heavy-duty vehicle tire having a total thickness corresponding to the thickness of material to be worn away during running, this tread having, in the new state, a tread surface (10) intended to come into contact with a roadway when running. The tread comprises at least one hidden cavity (2) forming a new groove opening onto the tread surface after a predetermined amount of partial wear. Cavity (2) comprises two opposite lateral walls (21, 22) connected together by bottom (23) radially towards the inside and by crown part (24) radially towards the outside. Crown part (24) is provided with a plurality of fine grooves (25) extending radially towards the outside from crown part (24) delimiting the cavity and extending in a direction that makes an angle at least equal to 40 degrees with the main direction of cavity (2).