Tire with a tread provided with two edges (25A, 25B) and with a centre (C) dividing it into two parts of equal width with sets of blocks (21A, 21B). Each set of blocks (21A, 21B) has three zones: at the edge (211), at the centre (213) and intermediate (212). Each set of blocks (21A, 21B) has a set of chamfers (26A, 26B, 26C) which extends over at least the edge zone (211) and the central zone (213) of the set of blocks (21A, 21B). The width LC2 of the set of chamfers (26A, 26B, 26C) over the intermediate zone (212) is different from the width LC3 of the set of chamfers (26A, 26B, 26C) over the central zone (213), said widths LC2 and LC3 being comprised between 0.5 mm and 2.5 mm.

A wheel includes: a hub; and a running wheel body, which includes a tread on an outer periphery thereof. The tread includes segments. The segments are essentially planar. First segments of the segments are inclined toward one end face of the running wheel body and second segments of the segments are inclined toward an other end face of the running wheel body.

A pneumatic tire includes a plurality of main grooves and a land portion defined by the main grooves. Further, the main groove includes a rib-shaped protrusion portion protruding from a groove bottom of the main groove and extending in a tire width direction, and being coupled to a groove wall of the main groove at, at least, one end. Further, a maximum height H1 of the protrusion portion has a relationship 0.01≤H1/Hg≤0.20 with respect to a groove depth Hg of the main groove. Further, the maximum height H1 of the protrusion portion is in a range H1≤1.6 mm.

A tire comprises a tread of width (W), having a total volume VT, comprising voids (221, 211, 212) defining a voids volume VE. There is defined TEV=VE/VT. Voids (211) delimit blocks (21A, 21B) organized into patterns (26) of pitch P succeeding one another in the circumferential direction (X). Part of the voids forms sipes (211, 212) in one of the patterns. SD corresponds to the ratio of a sum of the projected lengths (lpyi) of the sipes in an axial direction (Y) to the product P times W, multiplied by 1000. The tread forms a contact patch AC and blocks (21A, 21B) form a contact surface SC: TES=(AC−SC)/AC. For the tread when new, SD in any pattern of pitch P is comprised between 10 mm.sup.−1 and 70 mm.sup.−1, and TES/TEV is comprised between 1.5 and 1.9.

A tire according to this disclosure includes a rib-like or block-like land portion in contact with a road surface. The land portion includes a plurality of sipes. The end portion of the sipe positioned on the earlier contact side in contact with the road surface earlier as the tire rotates terminates in the land portion. The end portion of the sipe positioned on the later contact side in contact with the road surface lately as the tire rotates opens to the side wall of the land portion.

A non directional pneumatic tire is provided for an agricultural irrigation system. The tire includes first and second side walls and a radially outer wall defining an internal inflation chamber. A non directional tread pattern is defined on the tire and includes a plurality of longitudinal protrusions positioned substantially parallel to a rotational axis of the tire. The longitudinal protrusions are arranged in first and second rows extending from the first and second side walls toward and across the equatorial plane of the tire. The longitudinal protrusions of the first and second rows circumferentially alternate with each other and there is a circumferential spacing between adjacent longitudinal protrusions at the equatorial plane so that no portion of one longitudinal protrusion circumferentially coincides with or overlaps another.

A pneumatic tire includes lug grooves having alternating first and second groove portions. The first groove portion intersects an equator, extends in a width direction, and communicates with an adjacent second groove portion. The second groove portion inclines from the first groove portion at a smaller angle relative to a circumferential direction smaller than that of the first groove portion and extends to a tread edge on one side. The first groove portion is on a stepping side with respect to an end on the tread edge side. The second groove portions curve or bend and have an average angle in an inner region smaller than that of the second groove portions in an outer region. A maximum length in the width direction of center blocks defined by narrow grooves connecting adjacent second groove portions and the lug grooves is 25%-35% of a development width.

A tire has a tread portion that can include a first tread ground contact end on one side in a tire axial direction, a first shoulder circumferential groove closest to the first tread ground contact end, and a first shoulder land portion demarcated to be disposed outwardly of the first shoulder circumferential groove in the tire axial direction. A plurality of first shoulder grove portions extending from the first shoulder circumferential groove to the first tread ground contact end e1 can be in the first shoulder land portion. A pair of first shoulder groove portions adjacent to each other in a tire circumferential direction can have different angles relative to the tire axial direction. The plurality of first shoulder groove portions can include a plurality of kinds of first shoulder groove portions having different first pitch lengths at a connecting portion to the first shoulder circumferential groove. A maximum value of the first pitch length can be 1.2 to 1.5 times an average of the first pitch lengths.

A tire tread sculpture designed to achieve a high level of dry braking and great handling while not sacrificing snow traction a sculpture design implementing a continuous rib design across the entire width of the tire summit while reducing lateral pull due to the effect of the tread sculpture is disclosed, the tread sculpture having a plurality of lateral shoulder region features at a first angle and a center rib with a plurality of center features at an angle opposite to the shoulder region features.

A pneumatic tire has paired bead portions, paired sidewall portions, a tread portion, a plurality of lug grooves extending from a shoulder area of the tread portion to reach a buttress area of the sidewall portion, and a block defined by the plurality of lug grooves. The block includes a shoulder block provided in the shoulder area and a buttress block provided in the buttress area. At least some of the plurality of lug grooves end at a connecting portion connecting the paired buttress blocks, the connecting portion is provided on an inner side in the tire diametrical direction of position that are 50% of length in the tire diametrical direction of the buttress block from upper end position of the buttress block. A step or a protrusion where the buttress block has a largest upraised height is provided in the tire diametrical position of the connecting portion.