A tire includes, in a tread portion, a pair of shoulder main grooves, a crown region between the shoulder main grooves, and shoulder regions disposed outside of the shoulder main grooves in a tire axial direction. Land ratios of the crown region and the shoulder regions are respectively 40%-60%. In the crown region, a plurality of middle blocks are arranged on both sides of a tire equator, and each middle block has a longitudinal shape in which a length in the tire circumferential direction is larger than a length in the tire axial direction.

A pneumatic tire can suppress uneven wear of the tire and can improve traction performance on snow. Land portions (12A, 12B, 12C), between a pair of outermost side circumferential grooves (11d, 11d) on the outermost sides in the tire widthwise direction among a plurality of circumferential grooves (11a, 11b, 11c, 11d) extending in the tire circumferential direction, are divided into a plurality of blocks (14A, 14B, 14C) by widthwise grooves (13a, 13b, 13c). A pair of groove side faces (13ap, 13aq; 13bp, 13bq; 13cp, 13cq) opposed to each other in the widthwise grooves (13a, 13b, 13c) are bent at bent portions (Kp, Kq) thereof.

The tire includes a tread section (10) including a pair of circumferential main grooves (20), and the tread section (10) includes a center land region (CR) partitioned by the pair of circumferential main grooves (20) and a shoulder land region (SR) partitioned by one circumferential main groove (20) and a tread end (TE). The center land region (CR) forms a dense structure, in which no main groove extending along the tire circumferential direction (TC) is formed. The shoulder land region (SR) includes a block (40) partitioned by a plurality of shoulder lateral grooves (30) crossing in the tire width direction (TW). A sipe (50) extending in the tire width direction (TW) and having one end communicating with the one circumferential main groove (20) is formed in the block (40). A projection (43) projecting inward in the tire width direction is formed on a first groove wall (21) of the circumferential main groove (20) in a corner part (41) of the block (40) formed by intersection of the one circumferential main groove (20) and the shoulder lateral groove (30).

A pneumatic tire of the present disclosure includes two or more circumferential main grooves extending in a tire circumferential direction on a tread surface, and in a land portion defined by the two circumferential main grooves, a widthwise sipe extending in a tire width direction from each of the two circumferential main grooves, a circumferential sipe extending in the tire circumferential direction, and a hole connected to the circumferential sipe. The widthwise sipe is connected to the circumferential sipe or the hole, the widthwise sipe includes a first widened portion, on a sipe bottom side, at which a sipe width is larger than on the tread surface side, the circumferential sipe includes a second widened portion, on a sipe bottom side, at which a sipe width is larger than on the tread surface side, and the hole, the first widened portion, and the second widened portion are connected.

A tread (12) for a heavy truck tire is provided that has a bottom surface (14), a shoulder rib (16), and a sacrificial rib (20) located outboard from the shoulder rib (16) in a width direction. A decoupling void (30) is located between the shoulder rib (16) and the sacrificial rib (20). A decoupling void sipe (32) is in the shoulder rib (16) and opens at the shoulder rib upper surface (18) and at the decoupling void (30). The decoupling void sipe (32) extends in the thickness direction and is closer to the bottom surface (14) than the decoupling void (30) in the thickness direction.

Commercial vehicle tire of radial design with a tread with circumferential grooves formed to a profile depth, which divide the tread into at least two profile ribs (1) running in the central region of the tread with profile blocks (2) separated from one another by transverse grooves (3) and into shoulder-side profile ribs, wherein at least one of the circumferential grooves (4) adjoining a central profile rib (1) has, in cross section, a radially outer sipe-like narrow section (6) and a channel (8) adjoining this in the interior of the tread which is configured to be wider than the sipe-like narrow section (6) and which is delimited by two channel walls (8b) and a channel bottom (8a) forming the groove bottom, and wherein this circumferential groove (4) is interrupted in its course by entry points of transverse grooves (3).

Opposite the entry points, a projection (9, 9′) is formed locally in each case on the channel wall (8b) located opposite the entry points of the transverse grooves (3).

A pneumatic vehicle tire, in particular utility vehicle tire, having a tread which has a directional profiling with shoulder-side and middle profile ribs running in a circumferential direction, wherein at least one of the middle profile ribs (1), which is in particular a profile rib running along the tire equator, is traversed in an axial direction by sipes (4) with a width (b.sub.1) of 0.5 mm to 1.2 mm, each of which has a central portion (4a), in which the sipe (4) runs with an undulation in the direction of extent thereof, and two lateral portions (4b). The sipes (4) extend, in plan view, in an arc shape and symmetrically with respect to the centerline of the profile rib (1), and, in the lateral portions (4b) and in the central portion (4a), have a uniform undulation running in the radial direction, on which the undulation present in the extent direction of the sipes (4) is superposed only in the central portion (4a) of the sipe (4).

An outer surface TS of a tire 2 includes a tread surface T and a pair of side surfaces S. A plurality of arcs representing a contour of the tread surface T include a pair of crown arcs. A ratio of a radius CR1 of a first crown arc to a radius CR2 of a second crown arc is not less than 1.10 and not greater than 1.70. A total groove volume of a first circumferential groove 48 located in a zone from an equator to a first tread reference end TE1 is larger than a total groove volume of a second circumferential groove 50 located in a zone from the equator to a second tread reference end TE2.

A tire, for which a mounting direction on a vehicle is specified, has a tread portion comprising an outboard shoulder land region provided with outboard shoulder lateral grooves, and an inboard shoulder land region provided with inboard shoulder lateral grooves. The outboard shoulder lateral grooves are bent convexly toward one side in the tire circumferential direction, whereas the inboard shoulder lateral grooves are bent convexly toward the other side in the tire circumferential direction. The bent angle of the outboard shoulder lateral groove is larger than the bent angle of the inboard shoulder lateral groove.

A tire includes a circumferentially continuous decoupling groove that extends radially inward toward the rotational axis of the tire. The decoupling groove is formed by inner and outer walls that are axially spaced apart from each other and joined by a base wall interconnecting inner radial portions thereof. A width between the inner and outer walls of the decoupling groove varies over a radial depth of the decoupling groove. The inner wall extends at an angle of approximately 5° from a radial plane disposed perpendicular to the rotational axis of the tire.