A tire (10) for a vehicle comprises a radially outermost working layer (41) which comprises at least one undulation (412) in line with a central rib (251) of the tread (2). The undulation (412) is radially on the outside of the points of the working layer (41) in line with the bottom face (243) of the circumferential groove (24) closest to the undulation (412) and has an amplitude of at least 1 mm. The undulation (412) is vertically in line above at least one local reinforcing layer (6) comprising reinforcing elements that are mutually parallel and make with the circumferential direction (XX′) of the tire an angle of which the absolute value is at most equal to 5°.

The tire includes a tread portion 2 having at least one groove 3 that includes two groove walls 6. At least one of the groove walls 6 has a protrusion 10 that protrudes from the groove wall 6. The protrusion 10 includes at least two ribs 11 that extend in a length direction of the groove 3 and are spaced from each other in the tire radial direction, and a joining portion 12 for joining the ribs 11 to each other. Each rib 11 protrudes from the groove wall 6 so as to form such an inclination that the rib 11 is inclined outward from the groove wall 6 in a tire radial direction.

The subject of the disclosure is a tread for a tire, this tread having a tread surface intended to come into contact with a roadway and comprising at least one groove of width W and depth P delimited by two facing lateral walls, these lateral walls being connected together by a groove bottom. At least one groove has a plurality of closing devices for reducing the running resonance noise generated by this groove, each closing device comprising at least two flexible blades, a first flexible blade secured to the bottom of the groove and intended to flex around a first axis, and a second flexible blade secured to a lateral wall delimiting the groove and intended to flex around a second axis, the first flexible blade connected to the bottom having a maximum height H.

Tread profile of a vehicle tire with profile elements (1,12,13,14,15,6) separated from one another by grooves (7,8,9,10,23), wherein the profile elements (13,14,1,12) separated by a groove (9,7) are outwardly delimited in the radial direction R by a radially outer surface (16) forming the ground contact area and toward the groove (9,7) respectively by a profile element flank forming a groove wall (17,18), wherein a rubber rib (20,19) extending in the extension direction of the groove (9,7) is respectively formed in the profile element flanks which delimit the groove (9,7) and each form a different groove wall (17,18) of the groove (9,7), wherein the rubber rib (19) formed in one groove wall (17) is formed in a different radial position of the vehicle tire than the rubber rib (20) formed in the other groove wall (18), wherein the two rubber ribs each (19,20) extend over the entire extension length of the profile element flank and wherein each of these two rubber ribs (19,20) respectively extends along its entire extension length from that profile element flank in which it is formed into the groove (9,7) in the direction of the other profile element flank up to at least the middle of the groove width in this radial position of the groove (9,7) and ends there in the groove (9,7) at a distance d2 from the profile element flanks.

A heavy duty tire has a carcass extending from a tread portion to a bead core in a bead portion through a sidewall portion, and a belt layer disposed on the outside of the carcass in the tire radial direction and on the inside of the tread portion. In a state in which a distance between a pair of bead heels is kept at 110% of a wheel rim width of a standard wheel rim and no inner pressure is applied, the contour shape of the tread portion is formed by a 1st circular arc having a center on the tire equatorial plane, and a pair of 2nd circular arcs, disposed on both outsides of the 1st circular arc in the tire axial direction. The radius of the 2nd circular arc is more than the radius R1 of the 1st circular arc. One 2nd circular arc has the center on the other 2nd circular arc side of the tire equator in the tire axial direction, and the other 2nd circular arc has the center on the one 2nd circular arc side of the tire equator in the tire axial direction.

An object is to, in an aircraft tire, promote heat dissipation from circumferential direction grooves of a tread and improve durability of the tire. Plural circumferential direction grooves (central side circumferential direction grooves (14), edge portion side circumferential direction grooves (16)) that extend in a tire circumferential direction are formed in a tread (12). In a tire circumferential direction cross-section, a groove bottom (18) of at least one of the circumferential direction grooves has a wave shape having amplitude in a tire radial direction.

The present invention relates to a tire tread comprising a tread cap comprising at least one tread cap rubber compound, at least three circumferential grooves, wherein at least portions of the sidewalls and the bottom of each of said grooves are formed by a circumferential groove reinforcement, and wherein a first groove reinforcement of a groove laterally next to the equatorial plane of the tire comprises a first reinforcement rubber compound which has a higher hardness than the tread cap rubber compound, and wherein a second groove reinforcement of a groove with a larger lateral distance to the equatorial plane of the tire than the first groove, comprises a second reinforcement rubber compound which has a higher hardness than the tread cap rubber compound and a lower hardness than the second reinforcement rubber compound.

Tread profile of a pneumatic vehicle tyre—in particular for commercial vehicles—comprising a regroovable tread profile with radially raised profile elements (1, 2, 3, 4, 5) and with grooves (6, 7, 8, 9), which respectively separate two adjacent profile elements (1, 2, 3, 4, 5) from one another, wherein the grooves (6, 7, 8, 9) are bounded inwards in the radial direction R by a groove base (10) and on both sides in the axial direction by a profile element flank, forming the groove wall (12, 13), and wherein at least one regrooving indicator (14) for indicating the regrooving depth is respectively formed in one or more grooves (3), characterized in that, in at least one groove (8), all of the regrooving indicators (14) formed therein are formed in a groove wall (12) at a height H measured in the radial direction R of H>0 mm above the groove base (10), wherein the height H corresponds to the maximum radial abrasion position of the tyre for regrooving.

A tire includes a reinforcing rib formed on a groove to prevent irregular wear of a tread and including an auxiliary hidden groove formed in the groove to enhance capabilities of water absorption and drainage of the tire even when the reinforcing rib is formed on the groove. The tire can include a reinforcing rib coupled to a first sidewall, which is one of both sidewalls forming the groove, and protruding toward the groove from the first sidewall, a hidden groove formed in one portion of a second sidewall which is the other of the sidewalls forming the groove, and a remaining tread part protruding toward the groove from a side surface of the hidden groove, the remaining tread part being the other portion of the second sidewall.

A tire is a tire in which circumferential grooves, and lug grooves comprising opening portion in tread end and which extend in the tread width direction from the tread end to the circumferential groove, are formed. Projection parts are provided in the groove bottom of the circumferential grooves. The projection parts extend from one side wall forming a circumferential groove to the other side wall opposite the one side wall. Multiple lug grooves are formed at predetermined intervals in the circumferential direction. In the tread surface view of the tire, given points of intersection as the points at which a circumferential groove extension that passes through a circumferential groove intersects with a lug groove extension that passes through a lug groove, the projection parts are provided between a first point of intersection and a second point of intersection adjacent to the first point of intersection in the circumferential direction.