A tire includes a plurality of main lug grooves and a plurality of sub lug grooves that extend in a tire width direction and penetrate a tread surface, and that are arranged at predetermined intervals in a tire circumferential direction. Additionally, the main lug grooves have a maximum groove width Wg1 of 15.0 mm or more and a maximum groove depth of 23.5 mm or more. In addition, the sub lug grooves have a maximum groove width Wg2 that satisfies 0.10≤Wg2/Wg1≤0.35 with respect to the maximum groove width Wg1 of the main lug grooves. Additionally, at least one of the sub lug grooves is disposed between adjacent ones of the main lug grooves.

A pneumatic tire of the embodiment including two main grooves provided on a tread and extending in a tire circumferential direction; a center land portion formed between the two main grooves and extending in the tire circumferential direction; a pair of shoulder land portions formed between a ground contact end and the main groove; a center auxiliary groove provided on the center land portion; and a shoulder auxiliary groove provided on the shoulder land portion, in which the center auxiliary groove has a groove width narrower than that of the main groove and extends in the tire circumferential direction, and the shoulder auxiliary groove has a groove width narrower than that of the main groove and extends in the tire circumferential direction.

A heavy truck tire tread with a rib (18) located between first (14) and second (16) tread grooves. A shoulder block (30) is adjacent the rib and at a shoulder edge of the tread, and a decouple groove (32) is present that decouples the shoulder block from the rib. The decouple groove is spaced from and free from engagement with the shoulder edge, and extends at least twice as long in the longitudinal direction than in the lateral direction. The width of the decouple groove is less than widths of the first and second tread grooves. The tread has an average void depth that does not go past a twenty percent line, where the twenty percent line is twenty percent of a full void depth located from an outer surface of the tread, and where the average void depth does not include decouple grooves and tread outboard from the decouple grooves.

A tire includes four zigzag circumferential grooves and hexagonal blocks divided by the lateral grooves each extending so as to connect between adjacent ones of the zigzag circumferential grooves. The zigzag circumferential grooves include a pair of center circumferential grooves each having a groove width not more than 4.0 mm and a pair of shoulder circumferential grooves each having a groove width larger than that of each of the center circumferential grooves. A depth of each of the lateral grooves is smaller than a depth of each of the zigzag circumferential grooves, and a groove bottom of each of the lateral grooves is provided with a first sipe.

In a pneumatic tire are defined: a first imaginary line VL1 passing through a ground contact surface in a meridian cross section of a tread portion, a second imaginary line VL2 passing through a bottom portion of a shoulder main groove and parallel to VL1, an intersection point between VL2 and a surface of a shoulder land portion outward of a ground contact edge T in a lateral direction, and an equatorial plane CL. Given A as a distance in the lateral direction between an intersection point P and CL, B as a groove depth of the shoulder main groove, and C as a distance in the lateral direction between T and CL, 0.80≤(B+C)/A≤1.15 is satisfied and, given E as a distance in the lateral direction between the bottom portion of the shoulder main groove and P, 2.0≤E/B≤5.0 is satisfied.

A pneumatic tire includes a pair of sidewalls, a pair of bead portions, and a circumferential tread having a plurality of circumferential ribs and a plurality of circumferential grooves. A reinforcing layer is disposed in at least one of the plurality of circumferential ribs. No part of the reinforcing layer extends directly below a bottom surface of any of the plurality of circumferential grooves. The reinforcing layer has a consistent gauge along its entire lateral width. A top surface of the reinforcing layer is located radially higher than the bottom surface of each of the plurality of circumferential grooves.

A tire includes an outboard tread edge and an inboard tread edge to be located on an outboard side and an inboard side of a vehicle, respectively, circumferentially and continuously extending main grooves, and land portions divided by the main grooves. The land portions include an outboard shoulder land portion, an outboard middle land portion, an inboard shoulder land portion, and an inboard middle land portion. Each of the outboard shoulder land portion, the inboard shoulder land portion, and the inboard middle land portion is provided with axially extending lateral grooves. The outboard middle land portion is provided with outboard middle lateral grooves extending from an edge of the outboard middle land portion on the outboard tread edge side toward the inboard tread edge. The outboard middle lateral grooves are inclined with respect to a tire circumferential direction at angles smaller than those of the lateral grooves.

A groove of tire thread having a plurality of first and second portions, each delimited by facing walls spaced apart by a maximum width measured at the tread surface and approaching one another such that, at a depth between 20 and 80% of the total depth they are spaced apart by a width less than the maximum width or facing walls spaced apart by a minimum width measured at the tread and diverge from one another such that, at a depth between 20% and 80% of the total depth of the groove, they are spaced apart from one another by a width greater than the width. A plurality of first and second portions of groove so as to form a continuous passage between all the portions of groove in order to allow liquid to flow in the groove regardless of the level of wear.

A tire includes a tread portion provided with a plurality of blocks. At least one of the plurality of blocks is provided with a sipe. The sipe extends in a sipe longitudinal direction to form a zigzag opening configuration on a ground contact surface of the at least one of the plurality of blocks. The sipe extends inwardly in a tire radial direction such that the zigzag opening configuration oscillates in the sipe longitudinal direction repeatedly with a total amplitude and a wavelength while maintaining the zigzag opening configuration. A half of the wavelength of the sipe is in a range of from 0.10 to 0.24 times a maximum depth of the sipe, and a slope of the half of the wavelength with respect to the total amplitude has an angle in a range of from 45 to 65 degrees.

Tread (1) of a tire for an off-road vehicle, with total width (W) and total thickness of wearable material at least equal to 60 mm. The tread is delimited axially by shoulder regions (5) provided with grooves (7). This tread (1) comprises, in central region (6), narrow groove (61) and, between each shoulder region (5) and the central region (6), an intermediate region (4) in which there are formed a plurality of oblique or transverse narrow grooves (411, 412). Narrow groove (61) of the central part is made up of first narrow-groove parts (611) of depth (P1) and of second narrow-groove parts (612) of depth (P2). Depth (P1) is greater than depth (P2). Narrow grooves (411, 412) of one same intermediate region comprise, in the circumferential direction, an alternation of narrow grooves (411) of first depth (P11) and of narrow grooves (412) of second depth (P22).