A pneumatic tire includes a land portion provided in a tread portion and including a recess recessed inward in a tire radial direction. The recess includes three or more sides defining an opening that opens to a ground contact surface of the land portion and forming a polygon, and three or more side surface portions defined by the sides and line segments connecting respective vertexes of the sides and a bottom point provided on an inner side of the ground contact surface in the tire radial direction. The side surface portions are formed so as to approach the bottom point as the side surface portions extend inward in the tire radial direction from the ground contact surface.

A pneumatic tire includes a first tread-half region from the tire equator to a first tread edge. In the first tread-half region, a crown land portion and a middle land portion are not provided with any grooves having widths equal to or more than 2 mm. In the first tread-half region, crown, middle and shoulder portions are respectively provided with a first crown sipe, a first middle sipe and a first shoulder sipe each having a width less than 2 mm. The first crown sipe, the first middle sipe and the first shoulder sipe are respectively configured as arc shapes having radiuses R1, R2 and R3 of curvature to protrude in a first circumferential direction side, wherein the radiuses R1, R2 and R3 are satisfied the following relation: R1<=R2<=R3, and R1<R3.

All season tyre (1) for SUVs and Crossovers; the tyre having a tread band (7) provided with a plurality of sipes (21,22,23,24,25,26) regularly and homogeneously arranged, and a wide central region (LI) provided with three rows of blocks, at least wo of which are provided with transverse grooves only slightly inclined relative to a direction orthogonal to the equatorial plane. The central region (LI) lacks circumferential annular portions having a low void-to-rubber ratio located adjacent to central annular portions having a medium or high void-to-rubber ratio.

A pneumatic tire of the present disclosure includes, on a tread surface, circumferential main grooves extending in a tire circumferential direction and land portions defined between circumferential main grooves adjacent in a tire width direction among the circumferential main grooves or by the circumferential main grooves and tread edges. The land portions include widthwise grooves extending in the tire width direction and are divided into blocks by the widthwise grooves. At least one widthwise sipe extending in the tire width direction is included within the blocks. Hard rubber with a higher elastic modulus than that of tread rubber is disposed in a tire radial region including at least an opening to the tread surface of a wall defining the widthwise sipe. Microfabrication is applied in a region of the tread surface surrounding at least a portion of the opening of the widthwise sipe to the tread surface.

In a pneumatic tire, a sipe includes an edge on a leading side and an edge on a trailing side; the edge and the edge each include a chamfered portion shorter than a sipe length of the sipe; a non-chamfered region in which other chamfered portions are not present is provided at portions facing the chamfered portions of the sipe; and for all chamfered portions, including at least the chamfered portions of the sipe, formed on grooves other than main grooves, with a ground contact width being equally divided into three in the tire lateral direction, a total projected area A.sub.CE of chamfered portions provided in a center region centrally located in the tire lateral direction and each of total projected areas A.sub.SH of chamfered portions provided in shoulder regions located on either side of the center region satisfy a relationship A.sub.CE<A.sub.SH.

A tread portion has an outer tread end that is positioned on an outer side of a vehicle when mounted to the vehicle, a plurality of circumferential grooves that extend continuously in a tire circumferential direction, and a plurality of land portions that are defined by the circumferential grooves. The circumferential grooves include an outer circumferential groove that extends adjacently to a tire equator in a region closer to the outer tread end than the tire equator is. The land portions include an outer shoulder land portion that is defined between the outer circumferential groove and the outer tread end so as to continuously extend therebetween in a tire axial direction, and that has the largest width in the tire axial direction among the land portions. The outer shoulder land portion has a first outer lateral groove that extends inward in the tire axial direction and terminates in the outer shoulder land portion. An angle of the first outer lateral groove relative to the tire axial direction at a terminating position in the outer shoulder land portion is 0 to 20°.

The tread has a contact face that is provided with at least one circumferential groove and a transverse grooves opening to the contact face and delimiting contact elements. The tread has a center region and shoulder regions and is provided with at least one compressive contact element among the contact elements. A volumetric void ratio of the compressive contact element in a unit region surrounded by a center of the at least one circumferential groove and a center of the transverse grooves delimiting the compressive contact element is at least equal to 25%. An aspect ratio, which is defined as a ratio of a surface of the compressive contact element supposed to contact with ground divided by a sum of a surface area of the compressive contact element touching with air other than the surface of the compressive contact element supposed to contact with ground, is at most 70%.

A tire tread pattern includes: first sipes in a first land portion between first and second circumferential main grooves; first chamfered surfaces in which a tread surface of the first land portion is inclined toward a first circumferential main groove side in an end portion in a width direction, the first sipes opening to the first chamfered surfaces; second sipes in a second land portion on an opposite side of the first land portion with respect to the second circumferential main groove; and second chamfered surfaces in which a tread surface of the second land portion is inclined toward a second circumferential main groove side in an end portion in the width direction, the second sipes opening to the second chamfered surfaces. The first and second. chamfered surfaces are greater in length in the circumferential direction than in the width direction.

Tire (1) for a heavy-duty vehicle of civil engineering type, and more particularly to the tread (2) thereof, and seeks to improve the grip thereof, while at the same time ensuring a satisfactory compromise with wearing and thermal endurance. The tread (2) comprises cuts (3, 4, 5) distributed, in a circumferential direction (XX′) of the tire, among circumferential grooves (3) and, in an axial direction (YY′) of the tire, transverse sipes (4) and transverse grooves (5), the cuts (3, 4, 5) delimiting elements in relief (6), each cut (3, 4, 5) being delimited by two faces facing one another and each face intersecting the tread surface (21) along an edge corner (311, 321; 411, 421; 511, 521). The tread (2) having a longitudinal edge corners ratio TA.sub.X equal to the ratio L.sub.X/S between the sum L.sub.X of the projections, on to the circumferential direction (XX′), of the effective edge corner lengths, contained in an elementary tread surface portion of surface area S, and the surface area S, and a transverse edge corners ratio TA.sub.Y equal to the ratio L.sub.Y/S between the sum L.sub.Y of the projections, onto the axial direction (YY′), of the effective edge corner lengths, contained in an elementary tread surface portion of surface area S, and the surface area S, the longitudinal edge corners ratio TA.sub.X is at least equal to 4 m.sup.−1 and the transverse edge corners ratio TA.sub.Y is at least equal to 6 m.sup.−1.

A tyre includes a tread portion provided with a circumferential groove and a lateral groove. The at least one lateral groove includes a connected portion connected to the circumferential groove. The circumferential groove includes a groove bottom provided with groove bottom protruding portions protruding outwardly in the tyre radial direction. Each groove bottom protruding portion includes a first surface portion extending in the tyre radial direction and facing a first circumferential direction, and a second surface portion arranged on a second circumferential direction opposite to the first circumferential direction and extending at a larger angle with respect to the tyre radial direction than that of the first surface portion. In a tread plan view, at least a part of the groove bottom protruding portions is located in a lateral-groove extended region in which the connected portion is extended into the circumferential groove along the tyre axial direction.