A tire includes first and second laterally spaced sides and a tread interposed between the first and second sides. The tread includes a tread surface having at least one groove therein, the at least one groove including facing, first and second sidewalls separated by a groove bottom surface. A first pocket region of recessed serrations extends over at least a portion of the first sidewall and a second pocket region of recessed serrations extends over at least a portion of the second sidewall. The serrations of the first and second pocket regions are staggered in a circumferential direction relative to one another.

Tread (2) of a radial tire for a heavy vehicle. The tire alternatingly rolls in laden and unladen states on ascent and descent, respectively. Tread (2) has total width W.sub.T and comprises first median portion (21) having median width W.sub.c, where 0.2W.sub.T≤W.sub.c≤0.5W.sub.T. Tread (2) axially delimited by second and third lateral portions (22, 23) that have respective lateral widths (W.sub.S2, W.sub.S3) at least equal to 25% and at most equal to 40% of total width W.sub.T. Angle A.sub.51 of leading face (51) of every element in relief (31) of first median portion (21) is strictly less than angle A.sub.61 of trailing face (61) of said element in relief (31). Angle (A.sub.52, A.sub.53) of leading face (52, 53) of every element in relief (32, 33) of each of second and third lateral portions (22, 23) is strictly greater than angle (A.sub.62, A.sub.63) of trailing face (62, 63) of said element in relief (32, 33).

A tire includes a tread portion having a ground contacting surface and a first groove. A tread rubber forming the tread portion includes a first rubber layer and a second rubber layer. The second rubber layer has a complex elastic modulus smaller than a complex elastic modulus of the first rubber layer. The first groove includes a first groove edge, a groove bottom surface, and a first groove wall. In a lateral cross section of the first groove, the first groove wall includes a first wide top portion arranged between the first groove edge and the groove bottom surface and located outside the first groove edge in a groove width direction of the first groove. The first wide top portion is positioned in the second rubber layer.

A pneumatic tire for an agricultural vehicle, comprising: a center rib and lugs that are joined integrally with two end surfaces of the center rib, and that are disposed respectively on one side and on another side of the center rib in the width direction thereof so as to be at intervals from each other in the tire circumferential direction on both the one side and the other side, wherein: the center rib has a width of from 30% to 50% of a tread width of the tread portion, and within a range where the lugs are disposed at 25% or greater of the tread width from the equator, the lugs are formed at an angle of from 20° to 50°, relative to a tire rotation axis direction, on an opposite side from a tire rotation direction, and a sum total of a surface area of ground-contacting surfaces of all of the lugs is from 4.5% to 15% of a surface area of the tread portion in a case in which the tread portion is unrolled as a flat surface and seen in plan view.

A tread (2) for a driven axle of an agricultural vehicle, having a tread pattern elements (21) extending radially towards the outside from a bearing surface (22), the tread pattern elements having a total number N of tread pattern blocks (21) that are separated axially from one another, the tread pattern blocks having a contact face (211), a leading face (212) and a trailing face (213), the leading face being inclined at an angle α towards the rear with respect to the radial direction in the rolling direction (15) of the tread, the tread having a number n of tread pattern blocks in the case of which the angle α is between 50 degrees and 75 degrees, the number n being at least equal to 0.2×N.

A tire includes a pair of shoulder main grooves and one or more center main grooves extending in a tire circumferential direction and four or more rows of land portions defined by the pair of shoulder main grooves and the one or more center main grooves. Each of the pair of shoulder main grooves includes a groove opening portion having a wave-like shape with an amplitude in a tire width direction. Each of the pair of shoulder main grooves includes a groove bottom portion having a zigzag shape with an amplitude in the tire width direction. The groove opening portion in each of the pair of shoulder main grooves has an amplitude A1_sh having a relationship A1_sh<A2_sh with respect to an amplitude A2_sh of the groove bottom portion.

A tire includes a plurality of main grooves extending in a tire circumferential direction and four or more rows of land portions defined by the main grooves. Moreover, a middle land portion and a center land portion have a plurality of through lug grooves that pass through the land portions in a tire width direction, respectively. Pitch lengths of the through lug grooves are in a range of from 7% or greater to 14% or less of a tire maximum ground contact length. Additionally, maximum groove depths of the through lug grooves are in a range of from 5% or greater to 65% or less of maximum groove depths of the main grooves.

The invention relates to a utility vehicle tire having a tread with at least two circumferential channels (3), which are formed to a profile depth (T) and which separate central profile positives (1) and shoulder-side profile positives (2) from one another, the circumferential channels (3) having channel flanks (5a, 5b) toward the central profile positives (1) and the shoulder-side profile positives (2) having shoulder flanks (6) running toward the side wall.

At least one channel flank (5a, 5b) of at least one circumferential channel (3) and/or at least one shoulder flank (6) is provided with depressions (7, 7′) which extend into the profile positives (1, 2) and are open toward the surface of the tread and which, determined in each case at the periphery of the tread, have with respect to the level of the channel flank (5a, 5b) or shoulder flank (6) a depth (t.sub.1, t.sub.1′) of 2.0 mm to 5.0 mm and at the level of the channel flank (5a, 5b) or shoulder flank (6) a width (b.sub.1, b.sub.1′) of 4.0 mm to 15.0 mm,

each depression (7, 7′) being delimited by at least one surface (7c, 7d, 7′d), the surface(s) (7c, 7d, 7′d) being curved in such a way that, at its or their radially inner ends, it or they go(es) over without a kink into the channel flank (5a, 5b) at a depth (T.sub.1), determined in the radial direction, of 35% to 90% of the profile depth (T) or go(es) over without a kink into the shoulder flank (6) at a depth (T.sub.1′), determined in the radial direction, of 35% to 150% of the profile depth (T).

A tire is provided with a tread that includes first and second sectors and grooves. The second sectors are formed of a rigid reinforcing compound. Each of the first and second sectors has a contact face intended to contact a road surface when the tire is in use. Each groove includes sidewalls and a bottom, and extends from an end of an adjacent contact face. A depth P of each groove is measured in a radial direction between its bottom and a position corresponding to a radial height of the adjacent contact face. At least one of the second sectors has a contact face that includes a recess having a depth p of less than 2 mm, as measured in a radial direction from a surface of the recess to a position corresponding to a radial height of an adjacent first sector.

A pneumatic vehicle tire, in particular commercial vehicle tire, having a tread having in each case one shoulder-side profile rib (1) which is separated in each case from a central tread portion (3) by a wide circumferential groove (2) which is made to profile depth (T) and which runs around rectilinearly in the circumferential direction, wherein the circumferential groove (2) has a rounded groove base (8) and is delimited at the profile rib (1) by a rib flank (6). Recesses (9) are formed on the rib flank (6) of the circumferential groove (3) at the profile rib periphery, which recesses have, in the direction of extent of the circumferential groove (2), a length of extent (1) of 70% to 90% of the profile depth (T), at most of 30 mm, and in each case have, as seen in plan view, boundary surfaces (10a, 10b) which run toward one another in an L shape and extend in the radial direction, and a bottom surface (11), wherein, as seen in plan view, the one first boundary surface (10a) runs into the profile rib (1) at an angle (β) of up to 35° to the axial direction, and the second boundary surface (10b) runs at an angle (β.sub.2) of 90° to 125° to the first-mentioned boundary surface (10a), and wherein bottom surface (11) is situated at a depth (t) of 15% to 25% of the profile depth (T).