A tire has a tread portion that can include a first tread ground contact end on one side in a tire axial direction, a first shoulder circumferential groove closest to the first tread ground contact end, and a first shoulder land portion demarcated to be disposed outwardly of the first shoulder circumferential groove in the tire axial direction. A plurality of first shoulder grove portions extending from the first shoulder circumferential groove to the first tread ground contact end e1 can be in the first shoulder land portion. A pair of first shoulder groove portions adjacent to each other in a tire circumferential direction can have different angles relative to the tire axial direction. The plurality of first shoulder groove portions can include a plurality of kinds of first shoulder groove portions having different first pitch lengths at a connecting portion to the first shoulder circumferential groove. A maximum value of the first pitch length can be 1.2 to 1.5 times an average of the first pitch lengths.

A pneumatic tire includes chamfered sipes in a land portion each including a chamfered portion, and non-chamfered sipes in the land portion each not including the chamfered portion. The chamfered sipe includes one end communicating with the main groove that defines the land portion and the other end terminating within the land portion. The chamfered and non-chamfered sipes are alternately disposed in the circumferential direction. Of the non-chamfered sipes on both sides in the circumferential direction of the chamfered sipe, a relationship between a distance a and a distance b is in the range 1.5≤(b/a)≤12, where the distance a is between the chamfered sipe and a near sipe corresponding to the non-chamfered sipe located on a side closest to the chamfered sipe, and the distance b is between the chamfered sipe and the non-chamfered sipe located further from the chamfered sipe in the circumferential direction.

To provide a narrow and large-diameter tire capable of improving noise performance at high speeds without compromising handling performance at low temperatures.

The tire has a tread portion formed of an elastomer composition. A relationship between a tire outer diameter (Dt) and a tire cross-sectional width (Wt) satisfy a following expression (1). The tread portion includes at least one circumferential groove extending in a tire circumferential direction. A rubber thickness at a groove bottom of the circumferential groove is 0.05 to 0.25 times a maximum thickness of the tread portion. The elastomer composition has a phase difference δ of 5.0×10.sup.−2π [rad] or less between a maximum value of strain and a maximum value of stress when repeatedly deformed at a temperature of 30 degrees Celsius and a frequency of 10 Hz in a dynamic viscoelasticity test;

1963.4≤(Dt.sup.2×π/4)/Wt≤2827.4  (1).

In a tire having a specified mounting direction, groove area ratios Rin and Rout in ground contact regions on the vehicle inner and outer sides, respectively, satisfy Rin>Rout, average land portion areas Ain and Aout of intermediate regions Min and Mout on the vehicle inner and outer sides, respectively satisfy Ain<Aout, the number of blocks Nin, Nout in the intermediate regions Min, Mout, respectively, satisfy Nin≥1.5×Nout, total sipe lengths Sin, Sout in the intermediate regions Min, Mout, respectively, satisfy Sin<Sout, and sipes formed in the intermediate region Mout have a three-dimensional structure in a range of 70% or more of a sipe length.

In a tire, an outermost circumferential groove is on the outermost side in the width direction, a center land portion and center lug grooves are on an inner side of the outermost circumferential groove in the width direction, the center lug grooves include an end opening to the outermost circumferential groove, a width-direction sipe and a circumferential sipe are on an individual side of both sides in the circumferential direction of a center lug groove of an individual pair of the center lug grooves adjacent in the circumferential direction, the width-direction sipe includes one end opening to the outermost circumferential groove to which the center lug groove opens and the other end terminating within the center land portion, and the circumferential sipe includes one end opening to the center lug groove and the other end terminating near the width-direction sipe or communicating with the width-direction sipe.

A tread block arrangement is suitable for a tire or for a tread band for a tire. The tread block arrangement includes a tread block having a first sipe delimited by a first sipe wall, a second sipe wall and a bottom of the sipe. The first sipe wall and the second sipe wall are arranged parallel to each other and define a width of the sipe. At least the first sipe wall has an indentation to increase an empty volume of the sipe at the location of the indentation. The first sipe wall has an inclined section to form the indentation, wherein a distance between the first sipe wall and the second sipe wall increases towards the bottom of the sipe at the location of the inclined section. A tire has the tread block arrangement and a lamella plate for forming sipes of the tread block arrangement.

A pneumatic tire includes a tread; sidewalls; and beads. The tread includes main grooves, including a center main groove extending in a tire circumferential direction and a pair of shoulder main grooves extending in the tire circumferential direction, and land portions defined between the main grooves. At least one of the land portions includes lug grooves extending from at least one of the main grooves defining the at least one of the land portions and terminating within the at least one of the land portions. At least one of the lug grooves includes a raised bottom portion that is shallower than a groove bottom at a portion on an opening end side and a communicating portion that extends in a longitudinal direction of the at least one of the lug grooves following the raised bottom portion and is deeper than the raised bottom portion.

A tire comprises a tread portion comprising a first tread edge, a shoulder circumferential groove and a shoulder land portion. The shoulder land portion is provided with shoulder lateral grooves so as to be divided into shoulder blocks. Each of the shoulder blocks is provided with at least one shoulder sipe. At least one of the shoulder lateral grooves is provided with at least one tie bar raising from the groove bottom to connect between the adjacent shoulder blocks.

A pneumatic tire of the present disclosure includes: a pair of main grooves, lateral grooves and longitudinal grooves, wherein a center land, repeats, in the tire circumferential direction, four center blocks, each of the four center blocks includes a recessed portion that is open to the main groove, the lateral groove or the longitudinal groove and has one end closed, when the recessed portions provided in the four center blocks are defined as first to fourth recessed portions, the first recessed portion and the second recessed portion extend in a direction inclined to one direction with respect to the tire equator line, and the third recessed portion and the fourth recessed portion extend in a direction inclined to another direction with respect to the tire equator line, and a groove width of each of the first to fourth recessed portions is 5.0 mm or more.

A tire includes a tread portion including four circumferential grooves between outboard and inboard tread edges, and five land portions divided by the circumferential grooves. The circumferential grooves include an inboard shoulder circumferential groove located nearest to the inboard tread edge in the circumferential grooves. The land portions include an inboard shoulder land portion disposed axially outward of the inboard shoulder circumferential groove and having a ground contact surface with the smallest axial width in the land portions. The inboard shoulder land portion is provided with inboard shoulder lateral grooves and inboard shoulder sipes. The inboard shoulder lateral grooves include inner ends away from the inboard shoulder circumferential groove. The inboard shoulder lateral grooves extend axially outward from the inner ends to a location beyond the inboard tread edge. The inboard shoulder sipes extends from the inboard shoulder circumferential groove to a location beyond the inboard tread edge.