A pneumatic tire includes center lug grooves disposed at intervals in a tire circumferential direction that extend crossing a tire equator line and include a first groove turning portion and a second groove turning portion; shoulder lug grooves disposed in the intervals between the center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential main grooves to which the ends of the center lug grooves and the inner ends of the shoulder lug grooves in the tire width direction alternately connect; and a circumferential secondary groove disposed around the entire circumference of the pneumatic tire that intersects the center lug grooves between the first groove turning portion and the second groove turning portion.

The invention relates to a pneumatic vehicle tire having a tread with profile block rows (1, 2) with profile blocks (5) delimited by channels (3, 4), which channels (3, 4) form T-shaped intersections in plan view and are delimited by a channel base (6, 6′) and by block flanks (5a, 5′a), wherein, in channels (3), there are formed projections (7, 7′) which, in a radial direction, have at their highest point a height (h.sub.1, h.sub.1′), in relation to the lowest point of the channels (3), of 10% to 80% of the profile depth. The projections (7, 7′) are positioned in intersection regions of T-shaped intersections of the channels (3, 4) and are attached to that block flank (5a) which is situated opposite the opening-in point of the opening-in channel (4).

A tire tread (1) for a heavy construction plant vehicle, and aims to improve both its ability to not retain stones in its voids, during off-road use, and its ability to dampen the noise that it generates, during on-road use. At least one longitudinal groove (6) of the tread (1) has a longitudinal distribution of protuberances (7), and any protuberance (7) has a height H′ at least equal to 0.9 times the depth H of the groove (6) and has a first portion (71), having a height H1, a width W1 and a thickness T1, and a second portion (72), having a height H2, a width W2 and a thickness T2, satisfying the relationships: H′=H1+H2, 0.6*H′<=H2<=0.9*H′, W2>=0.25*W, T2<=min(3 mm; 1/3*T1), W1>=0.5*W, T1>=H1.

A tread for a tire includes a first circumferential main groove, a second circumferential main groove, a third circumferential main groove, and a fourth circumferential main groove. The fourth main groove has a stabilizing structure for increasing tread stiffness. The stabilizing structure has a circumferentially extending subgroove in a radially innermost bottom of the fourth circumferential main groove. The subgroove is axially offset a predetermined amount from a centerline of the fourth circumferential main groove.

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.

A pneumatic tire includes: a lateral groove that includes a groove bottom surface extending in a direction crossing a tire circumferential direction; and a protrusion provided on the groove bottom surface and extending in an extension direction of the groove bottom surface. The protrusion includes: a main body; and a raised portion provided at least at one end portion on one side in a longitudinal direction of the main body, and shaped such that a height of the raised portion from the groove bottom surface increases from an outside to an inside in the longitudinal direction of the main body. The raised portion has at least one vent mark that is a mark of a vent of a tire vulcanization mold.

Provided is a pneumatic tire. At least three blocks of a plurality of blocks formed on a tread portion, which include an outermost block positioned on an outermost side in a tire lateral direction and are adjacent to each other in the tire lateral direction, and at least two longitudinal grooves positioned between the at least three blocks are arranged on a platform, which is raised from a groove bottom of a lateral groove, has a flat top surface, and has a shape protruding toward both sides in a tire circumferential direction with respect to the at least three blocks. On a groove bottom of a longitudinal groove adjacent to the outermost block, a raised bottom portion raised from the groove bottom of the longitudinal groove is provided. The raised bottom portion connects the outermost block and the block adjacent to the outermost block.

A heavy duty pneumatic tire in which occurrence of uneven wear is inhibited is provided. In the tire, each shoulder land portion includes a groove wall portion forming a wall of a shoulder circumferential groove, and a cap portion located outward of the groove wall portion in an axial direction. A wear resistance index of the groove wall portion is lower than a wear resistance index of the cap portion. A ratio of a distance in the axial direction from an outer edge of the shoulder circumferential groove to a boundary between the groove wall portion and the cap portion on an outer surface of the shoulder land portion, to a width in the axial direction of the shoulder land portion, is not less than 20% and not greater than 30%.

Commercial vehicle tire of radial design with a tread with circumferential grooves formed to a profile depth, which divide the tread into at least two profile ribs (1) running in the central region of the tread with profile blocks (2) separated from one another by transverse grooves (3) and into shoulder-side profile ribs, wherein at least one of the circumferential grooves (4) adjoining a central profile rib (1) has, in cross section, a radially outer sipe-like narrow section (6) and a channel (8) adjoining this in the interior of the tread which is configured to be wider than the sipe-like narrow section (6) and which is delimited by two channel walls (8b) and a channel bottom (8a) forming the groove bottom, and wherein this circumferential groove (4) is interrupted in its course by entry points of transverse grooves (3).

Opposite the entry points, a projection (9, 9′) is formed locally in each case on the channel wall (8b) located opposite the entry points of the transverse grooves (3).

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.