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 tire according to the present disclosure is a tire including, in a tread surface, a block-shaped land portion partitioned by a partitioning groove or by the partitioning groove and a tread edge. The block-shaped land portion includes a first sipe and a second sipe extending from different positions in a surface of the block-shaped land portion inwardly in a tire radial direction. The first sipe includes, on a side of a sipe bottom, a widened portion with a larger sipe width than a side of the tread surface. The second sipe includes a plurality of holes recessed inwardly in the tire radial direction in a sipe bottom at positions separate in a sipe longitudinal direction.

A pneumatic tire comprising circumferential main grooves, a land portion defined by the circumferential main grooves, and a plurality of lug grooves disposed in the land portion that open to the circumferential main grooves. The land portion comprises notch portions formed on opening portions of the lug grooves and chamfered portions formed on edge portions of the notch portions. The notch portions have an edge portion with a V-shape projecting in a tire circumferential direction. A maximum width W2 of the notch portions and a width W3 of the chamfered portions have the relationship 0.30≦W3/W2≦1.80.

A tread 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). First decoupling void sipes (32), second decoupling void sipes (100) and third decoupling void sipes (104) are in the shoulder rib (16), and one second decoupling void sipe (100) is between one first decoupling void sipe (32) and one third decoupling void sipe (104). The first and third decoupling void sipes (32, 104) are closer to the bottom surface (14) than is the decoupling void (30) in the thickness direction. The second decoupling void sipe (100) is not closer to the bottom surface (14) than is the decoupling void (30) to the bottom surface (14) in the thickness direction.

A tread (10) for a heavy truck tire is provided that has an upper surface for engaging the ground, a leading edge, and a trailing edge forward of the leading edge in a rolling direction. The tread also has a J shaped sipe (30) that has a main portion (32) that extends from the upper surface. The main portion (32) has an opening at the upper surface and a bottom end (36) opposite the opening in a radial direction. A curved portion (38) extends from the bottom end (36) and has a bottom curved wall (40) that has a radius (r1). The curved portion (38) extends from the bottom end (36) forward in the rolling direction (24), and has a curved portion end (42).

A tire according to the present disclosure is a tire including, in a tread surface, a tread land portion partitioned by a partitioning groove or by the partitioning groove and a tread edge. The tread land portion includes a sipe extending from a surface of the tread land portion inwardly in a tire radial direction. The sipe includes a widened portion with a larger sipe width than a position adjacent in a sipe longitudinal direction. The cross-sectional area of the widened portion in cross section perpendicular to the tire radial direction is larger on inside than on outside in the tire radial direction.

A lamella plate for forming a sipe to a tire includes a first surface and an opposite second surface. The first surface has a first primary plate indentation and a first primary plate protrusion, and the second surface has a second primary plate protrusion opposite to the first primary plate indentation and a second primary plate indentation opposite to the first primary plate protrusion. The first surface defines a first primary lamella plate surface having a planar or a curved surface, from which the first primary plate protrusion protrudes and into which the first primary plate indentation descends. The second surface defines a second primary lamella plate surface having a planar surface or a curved surface, from which the second primary plate protrusion protrudes and into which the second primary plate indentation descends. A tire includes a primary first sipe producible in a molding process using the lamella plate.

A tread for a tire includes a first circumferential main groove, a second circumferential main groove, a third circumferential main groove, and a fourth circumferential main groove. The fourth main groove has a stabilizing structure for increasing tread stiffness. The stabilizing structure has a circumferentially extending wavy subgroove in a radially innermost bottom of the fourth circumferential main groove.

A pneumatic tire is provided with sipes, at least some of which have an open top end to the surface of the tread block. An intersection of the sipe with a surface that is geometrically congruent and parallel with the surface of the tread block and arranged a depth apart from the surface of the tread block into the tread block forms a curved line. A first sipe is shaped in such a way, that at all depths (d) within a range from the open top of the first sipe to a first transition depth, the curved line includes at least one deflection point having an inner corner that has a radius of curvature under 0.3 mm. A lamella plate for manufacturing the pneumatic tire, the tread band, or the tread block. Use of the lamella plate for manufacturing a tread block, a tread band, or a pneumatic tire.

A tire comprises a tread portion. The tread portion is provided with a sipe. The sipe comprises four sipe segments: a first sipe segment, a second sipe segment, a third sipe segment, and a fourth sipe segment. At least one of the first sipe segment and the third sipe segment comprises an oscillated portion which extends in the radial direction of the tire, while oscillating in a lateral direction orthogonal to the length direction of the sipe in a cross section of the sipe orthogonal to the length direction. Each of the first sipe segment and the third sipe segment comprises the oscillated portion including an oscillating-start portion, and the oscillating-start portion of the first sipe segment is inclined with respect to the tire radial direction in the same direction as the oscillating-start portion of the third sipe segment.