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.

Present disclosure provide a tread for a tire having a plurality of grooves formed in the tread, a plurality of contact elements delimited by a plurality of grooves and having circumferential surfaces, transverse surfaces and a contact surface intended to come into contact with ground during rolling, the contact element having a height H, and at least one connecting member connecting the transverse surface of the contact element to the transverse surface of the circumferentially adjacent contact element, a distance h between one of the connecting members and the contact face is at most equal to 30% of the height H, and a material of the connecting member is different from a material of the contact element, and a Young modulus of the material of the connecting member is higher than a Young modulus of the material of the contact element.

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 has a tread portion including a first land portion including first and second circumferential edges and and a tread surface. On the first land portion, curved grooves are provided in a tire circumferential direction. Each curved groove extends from a first end on the first circumferential edge side, terminates at a second end within the first land portion, and includes first and second curved portions and on the first end and second end sides, respectively. The first curved portion is an arc curve with a radius of curvature having a center on the first circumferential edge side of the curved groove. The second curved portion is an arc curve with a radius of curvature having a center on the second circumferential edge side of the curved groove.

A tyre for running on rough terrain has a tread portion including a plurality of blocks and tread crossing grooves extending between a first tread edge and a second tread edge without intersecting the blocks. Each of the tread crossing grooves includes a soil discharging space having a width of at least 10 mm or more and extending linearly so as to connect between the first tread edge and the second tread edge. The soil discharging space is inclined at an angle of 30 degrees or more and 50 degrees or less with respect to a tyre axial direction.

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.

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 tread portion 2 can include an inner tread end, an outer tread end, circumferential grooves, and land portions. The circumferential grooves can include an inner shoulder circumferential groove and an outer shoulder circumferential groove. The land portions can include an inner shoulder land portion and an outer shoulder land portion. The inner shoulder land portion can include inner shoulder lateral grooves and inner shoulder sipes. The outer shoulder land portion can include outer shoulder lateral grooves and outer shoulder sipes. Each outer shoulder sipe can have a chamfered portion at each of sipe edges on both sides. The chamfered portion can have a chamfered width that increases from a terminating end side toward the outer shoulder circumferential groove.

A tire having a tread portion, wherein the tread portion can include a pair of shoulder circumferential grooves, a pair of crown circumferential grooves, and a pair of middle land portions. Each middle land portion can include a plurality of middle sipes. Each middle sipe can have a chamfered portion at at least one of sipe edges on both opposite ends thereof. The chamfered portion can extend from the crown circumferential groove to the shoulder circumferential groove. A first chamfered width of the chamfered portion at a first one of the opposite ends on a crown circumferential groove side can be greater than a second chamfered width of the chamfered portion at a second one of the opposite ends on a shoulder circumferential groove side.

A pneumatic vehicle Eire having a tread with at least one profile block row (2, 3) which is divided into a multiplicity of profile blocks (2a, 3a) by transverse channels (6, 7) having channel flanks (7a) which extend at an angle (α, β) of up to 50° with respect to the axial direction, wherein transverse channels (6, 7) are provided, in each of which there is formed a base elevation (8, 8.sup.I) which locally reduces the depth (t.sub.1) of the transverse channel (6, 7) and which connects successive profile blocks (2a, 3a) in circumferential direction to one another, wherein the base elevation (8, 8.sup.I) has at least two base elevation parts (8a, 8b, 8c) of different height (h.sub.max, a, h.sub.max, bc).

Centrally on each of the base elevation parts (8a, 8b, 8c), there is formed at least one groove (10, 11) which runs in the dire tion of extent of the transverse channel (6, 7) and which emerges from the base elevation part (8a, 8b, 8c) at least on one side.