The present invention provides a tire for a vehicle comprising: a rotation axis, a midplane at a central position along the rotation axis; a circumferential tread portion around the rotation axis, the circumferential tread portion comprising: a tread pattern exhibiting at least a first pitch pattern and a second pitch pattern each comprising: a center block crossed by the midplane, and two side block alignments, said side block alignments being inclined with respect to one another and extending from the center block; the first pitch pattern including: a first pitch length, a first number of blocks; the second pitch pattern including: a second pitch length which is shorter than the first pitch length, and a third number of blocks which is greater than the first number of blocks.

Provided is a pneumatic tire. A tread portion includes a plurality of longitudinal grooves extending in the tire circumferential direction, a plurality of lateral grooves extending in a tire lateral direction, and a plurality of blocks defined by the longitudinal grooves and the lateral grooves. Notch portions are formed in portions of a freely-selected pair of blocks adjacent to each other across a longitudinal groove, the portions facing the longitudinal groove. The notch portions face with each other across the longitudinal groove. Each of the notch portions has a notch width and a notch depth larger on a center side in an extension direction of the longitudinal groove than on an outer side in the extension direction of the longitudinal groove.

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.

In a pneumatic tire, a block includes recess/protrusions on a road contact surface. Additionally, a recess/protrusion height of the recess/protrusions is from 0.1 mm to 1.0 mm. A width of the recess/protrusions is from 0.1 mm to 0.8 mm. A recess/protrusion region is where an arrangement interval between adjacent recess/protrusions is not greater than 1.2 mm. A smooth region other than the recess/protrusion region has an arithmetic mean roughness of the road contact surface of the block not greater than 50 m. A lateral length of the road contact surface of the block in a tire lateral direction is defined. In this case, the block includes the recess/protrusion region and the smooth region in an optional cross-section in a lateral range of not less than 40% of a lateral length of the road contact surface of the block.

A tire includes a plurality of land portions defined by a plurality of circumferential grooves, and each of the plurality of land portions has a plurality of lateral grooves crossing the land portion. Each of the plurality of lateral grooves is made up of a center region extending at an angle of inclination relative to a tread width direction and side regions extending at a smaller angle of inclination relative to the tread width direction than the center region, the side regions increasing in groove width toward the respective circumferential grooves. Each of the plurality of lateral grooves has a sipe having, only in the center region, a shallow portion with a smaller depth, the shallow portion being located at least near a boundary part between the center region and each of the side regions with a starting point of the shallow portion being apart from the boundary part.

A tire includes: circumferential grooves along a circumferential direction of a tire; lateral grooves along the circumferential direction, each lateral groove having one end opened to a side of the tire and the other end communicated with the circumferential groove; and narrow grooves in blocks defined by the circumferential and lateral grooves, each narrow groove having one end opened to the side of the tire and the other end communicated with the circumferential groove. The tire includes a surface that projects, at a position more to one side or the other in the circumferential direction than the narrow groove that is opened to the tire side, further to an outer side in a tire width direction than a tire side shape to which the narrow groove is opened, and the surface extends in a radial direction from a ground contact end to include a groove bottom of the narrow groove.

A tyre comprises a tread portion having a land region including a ground contacting surface defined between a first vertical edge and a second vertical edge and a lateral groove including a first portion extending from the first vertical edge, a second portion extending from the second vertical edge, and a connection portion connecting therebetween. The connection portion is a portion between a first small edge protruding circumferentially from the first portion and a second small edge protruding toward a circumferentially opposite side to the first small edge. A length in the tyre circumferential direction of each of the first and second small edges is smaller than a maximum groove width of each of the first and second portions. At least a part of the connection portion has a raised bottom portion having a depth smaller than that of the lateral groove at the first and second vertical edges.

A tyre has a tread portion provided with a rib. The rib is provided with a lateral groove extending so as to completely cross the rib. The lateral groove includes a first curved portion and a second curved portion. The first curved portion extends from a first end in a curved shape convex in a first direction in a tyre circumferential direction. The second curved portion extends from the second end in a curved shape convex in a second direction in the tyre circumferential direction. A groove width of the first curved portion is gradually increased over the entire length thereof as it goes toward the first end, or a groove width of the second curved portion is gradually increased over the entire length thereof as it goes toward the second end.

A tyre includes a tread portion provided with circumferentially extending main grooves and land portions. The main grooves include an outboard crown main groove, and an inboard crown main groove. The land portions include a crown land portion defined between the outboard crown main groove and the inboard crown main groove. The crown land portion is provided with first crown sipes having first ends connected to the outboard crown main groove and second ends terminating within the crown land portion, and second crown sipes having first ends connected to the inboard crown main groove and second ends terminating within the crown land portion, wherein the first crown sipes are inclined with respect to a tyre axial direction in a same direction as the second crown sipes, and the first crown sipes and the second crown sipes are different in angle with respect to the tyre axial direction.

This heavy duty pneumatic tire includes a block (6) on a tread surface (1). Shallow grooves are provided in the block. At least one of the shallow grooves (7, 9, 31, 32) is a raised bottom shallow groove that is in communication with at least one groove among circumferential grooves and transverse grooves adjacent to the block, extends in a direction intersecting the tire circumferential direction at least in a central portion of the block in the tire width direction, and has a groove depth that is shallower in the central portion of the block in the tire width direction than at an end of the raised bottom shallow groove in the tire width direction, thereby increasing block rigidity while achieving good mud drainage.