Provided is a pneumatic tire. At least one land portion is defined and formed by a plurality of circumferential main grooves provided in a tread surface. A main sipe including a body portion and a chamfered portion is formed in at least one side of the body portion. A branch sipe branching from the chamfered portion is provided. The depth of the body portion is equal to or greater than the depth of the branch sipe.

The tire includes a tread portion having circumferential grooves extending in a tire circumferential direction and land regions demarcated by the circumferential grooves. The circumferential grooves include a first circumferential groove and a second circumferential groove adjacent to the first circumferential groove and having a width larger than the first circumferential groove. The land regions include a first land region demarcated between the first circumferential groove and the second circumferential groove. The first land region has lateral grooves extending in a tire axial direction and lateral sipes extending in the tire axial direction and each having a width smaller than that of each of the lateral grooves. A total value of the widths of the lateral grooves and the lateral sipes connected to the second circumferential grooves is smaller than a total value of the widths of the lateral grooves and the lateral sipes connected to the first circumferential grooves.

A tread block arrangement suitable for a tire or for a tread band for a tire. The tread block arrangement comprises a tread block that limits a first primary sipe. The first primary sipe comprises at least a first deep part and a second deep part separated from the first deep part by a first shallow part. A depth of the first deep part is at least three times a depth of the first shallow part and a depth of the second deep part is at least three times the depth of the first shallow part. The first deep part is limited in a longitudinal direction of the first primary sipe by a primary first end wall and a secondary first end wall such that a first angle between the primary first end wall and the secondary first end wall is from 1 degree to 30 degrees. The second deep part is limited in a longitudinal direction of the first primary sipe by a primary second end wall and a secondary second end wall such that a second angle between the primary second end wall and the secondary second end wall is from 1 degree to 30 degrees.

The tread has a contact face which is provided with a plurality of grooves opening to the contact face and a plurality of contact elements being delimited by the plurality of grooves. Each contact element has a top face constituting a part of the contact face and at least two incisions opening to the top face and extending radially inward of the contact elements. The incisions include at least one thin incision that is delimited via two opposed thin incision faces having a width t1 and at least one thick incision being delimited via two opposed thick incision faces having a width t2. The width t2 is thicker than the width t1. The at least one thick incision comprises at least one protrusion protruding from one of the thick incision face toward another thick incision face. The width t2 of the at least one thick incision is at least equal to 1.0 mm.

A pneumatic tire comprises a tread portion; four main grooves extending in a tire circumferential direction in a tread surface of the tread portion, each having a wave-like shape with periodic oscillation; a center land portion, middle land portions adjacent to the center land portion on either side in a tire lateral direction, and shoulder land portions outwardly adjacent to the middle land portions in the tire lateral direction formed by the main grooves; a plurality of lug grooves that intersect the tire circumferential direction disposed in a row in the tire circumferential direction in the land portions, the plurality of lug grooves each being disposed on a smooth, continuous curved line that crosses the land portions between the outer ends of the tread portion in the tire lateral direction.

In the pneumatic tire according to this disclosure, a plurality of sipes on a tread surface include a large intermediate width sipe 4 having: a pair of intermediate sipe wall surface portions 61, a pair of bottom-side sipe wall surface portions 62 and a pair of tread-surface-side sipe wall surface portions 63; and within a central region of the tread surface, a spacing along a tire circumferential direction between the large intermediate width sipe and another sipe or groove is 2.0 to 4.0 times of a sipe depth D of the large intermediate width sipe.

Provided is a tire in which a first intermediate land portion 3b of most vehicle-installed outside includes a sipe extending in a tire width direction, the sipe comprises a first sipe So that communicates with a circumferential groove 2a adjacent to a vehicle-installed outside of the first intermediate land portion 3b, and terminates in the first intermediate land portion 3b, and a second sipe Si that communicates with a circumferential groove 2b adjacent to a vehicle-installed inside of the first intermediate land portion 3b, and terminates in the first intermediate land portion 3b, the first sipes So and the second sipes Si are alternately present in a tire circumferential direction, and a sipe width of the first sipe So is larger than a sipe width of the second sipe Si.

A pneumatic tire is provided in which main sipes 20 are formed on land sections of a tread and at least one of ends in an extending direction of each main sipe is a blocked end 21 that is blocked in the land section, auxiliary sipes 23 separated from the main sipe are formed on both sides of the blocked end, the blocked end overlaps with the auxiliary sipes on both sides thereof in a direction orthogonal to the extending direction of the main sipe, a distance between a center in an extending direction of the auxiliary sipe and the blocked end is 10% or more to 20% or less of a depth of the main sipe, the extending direction of the auxiliary sipes is inclined with respect to the extending direction of the main sipe, and the auxiliary sipes are gradually shortened as coming toward a depth direction.

Embodiments include a tire tread having a plurality of tread elements and a plurality of lateral discontinuities arranged along the tread width and tread length, each of the plurality of tread elements being spaced apart by one of the plurality of lateral discontinuities. The tread width is divided into a plurality of regions, the plurality of regions including: (1) a pair of outermost regions, each outermost region being arranged closest to one of the pair of opposing lateral sides of the tread, and (2) at least one centermost region is arranged closest to the longitudinal centerline of the tread. Each of the lateral discontinuities have a thickness, where the thickness of one or more of the lateral discontinuities arranged in each of the outermost regions is smaller than the thickness of one or more of the lateral discontinuities arranged in the centermost region.

A pneumatic tire in which a mounting orientation to a vehicle is designated, includes: the at least four land portions include an outside shoulder land portion, an outside quarter land portion, an inside shoulder land portion and an inside quarter land portion. A total ground contact area of the outside shoulder land portion and the outside quarter land portion is larger than a total ground contact area of the inside quarter land portion and the inside shoulder land portion. The outside quarter land portion has a first circumferential sipe extending in a tire circumferential direction. On the first circumferential sipe, a chamfered first inclined surface portion extending in the tire circumferential direction is provided between a vehicle outside inner wall of the first circumferential sipe and s surface of the outside quarter land portion.