A pneumatic tire of the present disclosure includes two or more circumferential main grooves extending in a tire circumferential direction on a tread surface, and in a land portion defined by the two circumferential main grooves, a widthwise sipe extending in a tire width direction from each of the two circumferential main grooves, a circumferential sipe extending in the tire circumferential direction, and a hole connected to the circumferential sipe. The widthwise sipe is connected to the circumferential sipe or the hole, the widthwise sipe includes a first widened portion, on a sipe bottom side, at which a sipe width is larger than on the tread surface side, the circumferential sipe includes a second widened portion, on a sipe bottom side, at which a sipe width is larger than on the tread surface side, and the hole, the first widened portion, and the second widened portion are connected.

A tire comprises a tread portion axially divided into four land regions. The tire has a mounting direction to a vehicle and the land regions 4 include a widest outboard middle land region. The outboard middle land region is provided with first, second and third inclined grooves. The first inclined groove extends from a crown main groove and terminates within the outboard middle land region. The second inclined groove has its both ends terminated within the outboard middle land region. The third inclined groove intersects the first and second inclined grooves.

In a tire, first and second center land portions each include a circumferential narrow groove and first and second lateral grooves. The first and second lateral grooves of the first center land portion are disposed overlapped with each other in a tire circumferential direction. The first and second lateral grooves of the second center land portion are disposed overlapped with each other in the tire circumferential direction. The first and second lateral grooves of the first center land portion are disposed offset with respect to the first and second lateral grooves of the second center land portion in the tire circumferential direction.

Center land portions of a tire each include a circumferential narrow groove extending in a tire circumferential direction, and a first lateral groove opening to one edge portion of each of the center land portions at one end and connecting to the circumferential narrow groove at the other end, and a second lateral groove opening to the other edge portion of the center land portion at one end and connecting to the circumferential narrow groove at the other end. Further, the circumferential narrow groove has a zigzag shape formed by repeatedly connecting a first long portion, a first short portion, a second long portion, and a second short portion. Furthermore, the first lateral groove connects to the first long portion of the circumferential narrow groove having the zigzag shape, and the second lateral groove connects to the second long portion of the circumferential narrow groove having the zigzag shape.

A tyre comprising an adaptive tread, the adaptive tread comprising a plurality of surface sections, wherein each surface section can move without deformation relative to the other surface sections to form a tread pattern.

A pneumatic tire is provided with, in the tread surface, land portions that include a rib or a plurality of blocks. The land portions are provided with a plurality of narrow shallow grooves and a plurality of recessed portions in a contact patch. Additionally, the opening area ratio Sc of the recessed portions in the central portion region in the tire lateral direction of one continuous contact patch and the opening area ratio Se of the recessed portions in the end portion regions in the tire lateral direction have the relationship Se<Sc, where the central portion region is defined as the region in the central portion in the tire lateral direction occupying 50% of the continuous contact patch of the land portions, and the end portion regions are defined as the regions in the left and right end portions in the tire lateral direction occupying 25%.

A tire comprises a tread portion 2 provided with a first main groove 3 and a second main groove 4 each extending in a zigzag manner and a land region 10 defined between them. The land region 10 is provided with a longitudinal sipe 15 extending in a zigzag manner in the tire circumferential direction, first lug grooves 16, and second lug grooves 17. The land region 10 comprises first blocks 21 divided by the longitudinal sipe 15 and the first lug grooves 16, and second blocks 22 divided by the longitudinal sipe 15 and the second lug grooves 17. Each of the first blocks 21 and the second blocks 22 is provided with not less than three transverse sipes 25 extending across the entire width of the each of the first blocks 21 and the second blocks 22.

Tire tread (1) is divided into central part (20) and edge parts (30), central part (20) having width Lc between 40% and 90% of total width W of the tread. Edge parts (30) do not have any transverse cuts. Central part (20) has a tread pattern with circumferentially oriented sipe (21) and transversely oriented sipes (22, 22′, 22″) distributed around the periphery of the tread, such sipes having a depth at least equal to 60% of thickness E of material to be worn away and being interconnected to form a network. Such sipes are continued by hidden channels (210, 220). Central part (20) is delimited axially by transverse sipes (22′, 22″), each of which ends in end channel (221′, 221″) that opens onto tread surface (10) and extends into the thickness of the tread, and each end channel (221′, 221″) is connected to the network formed by the hidden channels.

The tread comprises a plurality of blocks, each block being delimited by transverse or oblique grooves and circumferential grooves. Each block is provided with a sipe which has three branches. The branches have common ends. A first branch is oriented in a transverse or oblique direction. A second branch and a third branch each open when new into a transverse groove delimiting the block. The angle formed between the first and second branches is 100 to 125 degrees, and the angle formed between the first and the third branches is 100 to 125 degrees. After wear, each sipe represents between 45% and 70% of the total wearable thickness, such that the lengths of the three branches measured on the new tread surface, L1′, L2′, L3′ respectively, are shorter than the lengths L1, L2, L3 respectively measured on the tread surface when new.

A heavy truck tire tread (12) is provided that has a partially hidden longitudinal groove (22) with an undersurface channel (24) engaged by a longitudinal sipe (26). The partially hidden longitudinal groove (22) has a surface opening (28) that extends from a surface of the tread to the undersurface channel (24). The tread (12) has at least one of two features. The first feature is that the surface opening (28) extends from the surface to the undersurface channel (24) at an angle to the thickness direction such that the surface opening (28) at the surface is forward of the surface opening (28) at the undersurface channel (24) in the rolling direction (20). The second feature is that a lateral sipe (32) engages the surface opening (28) so that the first end is at the surface opening (28), and the second end is forward of the first end in the rolling direction (20).