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. The buttress area is provided with an annular rib annularly extending along a tire circumferential direction. The lug grooves are comparted into an outside lug groove positioned in an outer side of the annular rib, and an inside lug groove positioned in an inner side of the annular rib. A widened portion is provided in at least part of the plurality of lug grooves so as to enlarge a width of the annular rib.

A pneumatic vehicle tire including a utility vehicle tire has a tread with profile positives which are separated from one another in a circumferential direction by transverse channels which extend continuously from the central region of the tread as far as the lateral tread edges, respectively. The transverse channels are main channels of the tread and, at least over the major part of the course thereof, have the maximum provided profile depth. The transverse channels are provided, on the respective channel base thereof, with a row of base elevations formed so as to be distributed over the entire course of the transverse channels. The base elevations are attached to the channel flanks of the transverse channels and are configured such that their rubber volume becomes smaller the closer to the tread edge they are disposed.

Tread (1) for a heavy-duty vehicle tire having, when new, a tread surface (10), with at least one evolving cut (2) comprising a part (22) hidden inside the tread which is delimited by opposing walls (221, 222) distant from one another by a maximum width Lc. The part (22) being extended towards the tread surface (10) by a sipe (21), opening into the hidden part (22) to be offset from one of the walls (221, 222) delimiting the hidden part to form a bridge situated radially over said hidden part (22). The tread having a plurality of grooves (4) open when new onto the tread surface (10), these grooves (4) opening into an evolving cut (2) to form a connecting region (41), the tread (1) further comprising, in at least 50% of the connecting regions (41, 42), a protuberance (5) extending over the entire height Hc of the hidden part (22) and over a maximum thickness Ep so as to act as a support for the bridge (211) situated radially over the hidden part (22) in the connecting region (41).

A pneumatic tire includes shoulder lands and a center land, defined by main grooves on both sides of an equator in a zigzag pattern along a circumferential direction, are defined in a tread. Shoulder lug grooves extending in a width direction are formed in each of the shoulder lands. First and second center lug grooves, which extend from the shoulder lug grooves across each of the main grooves and are inclined at an angle of 45°-70° with respect to the width direction, are disposed in the center land. The first center lug groove terminates at the equator, and the second center lug groove terminates without reaching the equator. The first and second center lug grooves are alternately disposed in the circumferential direction. Connecting grooves inclined in an opposite direction to an inclination direction of the center lug grooves to connect the center lug grooves are formed in the center land.

A pneumatic tire includes a plurality of circumferential main grooves, a plurality of lug grooves, and a plurality of blocks. Raised bottom portions are formed on groove bottoms of shoulder circumferential main grooves that are the circumferential main grooves, among the plurality of circumferential main grooves, positioned most outward in a tire lateral direction, and shoulder lug grooves that are the lug grooves, among the plurality of lug grooves, positioned outward from the shoulder circumferential main grooves in the tire lateral direction and connected to the shoulder circumferential main grooves from outer sides in the tire lateral direction. The raised bottom portions are formed so as to exclude at least intersection portions where the shoulder circumferential main grooves and the shoulder lug grooves intersect.

A pneumatic tire includes two circumferential main grooves disposed in an inner half of a tread developed width in a tire lateral direction; shoulder lug grooves that divide shoulder land portions into shoulder block portions and that each include a see-through portion in the tire lateral direction; center lug grooves dividing a center land portion into a plurality of center block portions; and center sipes having both ends terminated in the center block portions. The center sipe includes at least two sipe portions having different angles via at least one bent portion. An angle θ.sub.1 of at least one sipe portion with respect to a tire equator line satisfies 0°≤θ.sub.1≤15°, and an angle θ.sub.2 of at least the other sipe portion with respect to the tire equator line satisfies 35°≤θ.sub.2≤60°.

A pneumatic tire includes a plurality of blocks formed by being divided by a longitudinal groove in a tire width direction and divided by a lateral groove in a tire circumferential direction. The blocks include a first block on the inner side in the tire width direction, a second block on the outer side in the tire width direction, a third block adjacent to the first block in the tire circumferential direction, and a fourth block adjacent to the second block in the tire circumferential direction. The pneumatic tire includes a bridge formed in the longitudinal groove and the lateral groove and coupling the first block, the second block, and the third block, or the third block, the fourth block, and the second block.

A pneumatic tire includes shoulder lug grooves and narrow grooves. The shoulder lug grooves are positioned outward in a width direction with respect outermost main grooves. The narrow grooves are positioned outward in the width direction with respect to the outermost main grooves, are formed in spaces between the shoulder lug grooves that are adjacent to each other in the tire circumferential direction, and have both ends connected to the shoulder lug grooves. The narrow grooves are formed across the ground contact edges. A relationship W≥(D1×0.8) is satisfied, where W indicates a distance between the ground contact surface inner end portions and the outermost main grooves in the tire width direction and D1 indicates a groove depth of the outermost main grooves.

Tread (1) for a pneumatic tyre, comprising a sequence of tread elements (5) forming an overall “V” shape with two lateral wings (7, 7′), each of said wings being formed from three tread blocks (11, 21, 31) separated therebetween by first and second grooves (15, 16); said three tread blocks (11,21,31) comprise at least one shoulder block (11) provided with at least a first sipe (111) having a “zig-zag” shape; each shoulder block (11) further comprises a channel (112) with a longitudinally evolution which extends on the shoulder block (11), until it reaches and emerges upon the corresponding second groove (15); the channel (112) with a longitudinal evolution comprises an end portion (300, 301) that opens onto said second groove (15), said end portion (300) having a variable depth, said terminal portion having at least one inclined portion (300) wherein the depth gradually decreases from the outside towards the inside of the pneumatic tyre, as the interface with this second groove (15) approaches.

A tire has a block pattern. The block pattern includes a plurality of linked block pairs. Each linked block pair includes two blocks 28 and a tie bar 30 interposed between the two blocks 28 and linking the two blocks 28 together. The tie bar 30 has a toe end 40 having a height equal to or smaller than a height of the blocks 28 and a heel end 38 having a height smaller than the height of the toe end 40.