Provided is a pneumatic tire. An outer side intermediate land portion and outer side shoulder land portion have lug grooves extending in a width direction while curving; one end of the lug grooves in the outer side shoulder land portion reaches a ground contact edge, while the other end terminates in the outer side shoulder land portion; one end of the lug grooves in the outer side intermediate land portion communicates with a shoulder main groove and the other end terminates in the outer side intermediate land portion; an opening end of the lug grooves in the outer side intermediate land portion with respect to the shoulder main groove exists on an extension line of the lug grooves in the outer side shoulder land portion; and a pair of lug grooves adjacent in the outer side intermediate land portion are disposed to not overlap each other in the circumferential direction.

A tire includes a narrow shallow grooved region on a land portion defined by a circumferential main groove. The narrow shallow grooved region includes a plurality of narrow shallow grooves that are not open to the circumferential main groove. A ratio of a total area of the narrow shallow grooved region to a ground contact area of the land portion is not less than 0.05 and not greater than 0.60.

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.

A pneumatic tire includes a sipe formed in a tread rubber which includes an opening extending in a first direction in a surface of the tread rubber. The opening is provided between a first edge of the tread rubber extending in the first direction and a second edge of the tread rubber adjacent to the first edge in a second direction orthogonal to the first direction. The first edge and the second edge are divided into a first range defined in the first direction and a second range different from the first range. In the first range, the first edge is provided with a first chamfered portion. In the second range, the second edge is provided with a second chamfered portion. In the first range, the second edge is not provided with a chamfered portion. In the second range, the first edge is not provided with a chamfered portion.

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 pneumatic tire includes: a rib defined by a circumferential main groove; circumferential sipes formed in the rib at intervals in the circumferential direction; rib edge sipes formed in the rib aligning in the circumferential direction, each of the rib edge sipes terminating in the rib opening to the circumferential main groove; and first and second narrow grooves extending in the circumferential direction, each of the first and second narrow grooves having a groove depth shallower than depths of the circumferential sipes and the rib edge sipes, the first narrow grooves having ends connected to one of the circumferential sipes adjacent to each other in the circumferential direction and the second narrow grooves each including an inner connecting portion connected to one of the first narrow shallow grooves and including an outer connecting portion connected to one of the rib edge sipes.

An outer shoulder land region includes first shoulder lateral grooves each extending axially inwardly from an outer tread ground contact edge to have a first inner end in the tyre axial direction within the outer shoulder land region, first outer shoulder lateral sipes each connecting between the first inner end and an outer shoulder main groove, and second outer shoulder lateral sipes each extending axially inwardly from the outer tread ground contact edge to have a second inner end positioned on an axially outer side of the first inner ends. An outer middle land region includes outer middle lateral sipes each smoothly connected with the respective first outer shoulder lateral sipe with the outer shoulder main groove therebetween. Each of the outer middle lateral sipes connects between the outer shoulder main groove and an outer crown main groove and has a third inner end within the outer middle land region.

A pneumatic tire having lug grooves in shoulder land portions that each include one end reaching at least a ground contact edge and an other end terminating in the shoulder land portion. Sipes in the shoulder land portions each include one end communicating with a shoulder main groove and an other end terminating in a ground contact region. Lug grooves in intermediate land portions each include one end communicating with the shoulder main groove and an other end terminating in the intermediate land portion. Sipes in the intermediate land portion each include one end communicating with a center main groove and an other end terminating in the intermediate land portion. Sipes in the center land portion each include one end communicating with the center main groove and an other end terminating in the center land portion without exceeding a tire center line.

A pneumatic tire includes a tread portion 16, a sidewall portion 14, a buttress portion 18, and a hollow portion 50. A cross-sectional shape of a bottom surface of the hollow portion 50 is a curved shape in which a plurality of arcs having different radii of curvature are disposed in a tire radial direction and adjacent arcs are connected at a contact point C where the adjacent arcs have a common tangent line, or is a shape in which a plurality of arcs having different radii of curvature are connected by a straight line connecting contact points where the adjacent arcs have a common tangent line. An outside end 32a, in the tire radial direction, of a sidewall rubber 32 provided on the sidewall portion 14 is located on an outside Ro in the tire radial direction from the groove bottom 36B1 of the shoulder main groove 36B.