A tyre includes a tread portion provided with a circumferential groove and a lateral groove. The at least one lateral groove includes a connected portion connected to the circumferential groove. The circumferential groove includes a groove bottom provided with groove bottom protruding portions protruding outwardly in the tyre radial direction. Each groove bottom protruding portion includes a first surface portion extending in the tyre radial direction and facing a first circumferential direction, and a second surface portion arranged on a second circumferential direction opposite to the first circumferential direction and extending at a larger angle with respect to the tyre radial direction than that of the first surface portion. In a tread plan view, at least a part of the groove bottom protruding portions is located in a lateral-groove extended region in which the connected portion is extended into the circumferential groove along the tyre axial direction.

A tyre includes a tread portion having a tread surface being provided with a plurality of lateral grooves extending in a tyre axial direction. In a cross-sectional view perpendicular to a longitudinal direction of the at least one of the plurality of lateral grooves, the at least one of the plurality of lateral grooves includes a pair of groove walls and a groove bottom. At least one of the pair of groove walls includes a serrated portion including first surfaces and second surfaces that are arranged alternately. Each first surface is inclined outwardly in a groove width direction toward the groove bottom and has a radially inner end thereof, and each second surface extends substantially parallel with the tread surface from the radially inner end of a respective one of the first surfaces toward a groove centerline of the at least one of the plurality of lateral grooves.

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 includes: a lateral groove that includes a groove bottom surface extending in a direction crossing a tire circumferential direction; and a protrusion provided on the groove bottom surface and extending in an extension direction of the groove bottom surface. The protrusion includes: a main body; and a raised portion provided at least at one end portion on one side in a longitudinal direction of the main body, and shaped such that a height of the raised portion from the groove bottom surface increases from an outside to an inside in the longitudinal direction of the main body. The raised portion has at least one vent mark that is a mark of a vent of a tire vulcanization mold.

A pneumatic tire includes: a lateral groove that includes a groove bottom surface extending in a direction crossing a tire circumferential direction; and a protrusion provided on the groove bottom surface and extending in an extension direction of the groove bottom surface. The protrusion includes: a main body; and a raised portion provided at least at one end portion on one side in a longitudinal direction of the main body, and shaped such that a height of the raised portion from the groove bottom surface increases from an outside to an inside in the longitudinal direction of the main body. The raised portion has at least one vent mark that is a mark of a vent of a tire vulcanization mold.

Present invention provides a tread for a tire being provided with a plurality of grooves extending in an orientation having a non-zero angle A with circumferential orientation, at least two circumferentially adjacent grooves delimiting a contact element, the contact element having at least one incision extending in an orientation substantially parallel to the grooves, the contact element being delimited into sub-contact elements, on a plane perpendicular to the orientation in which the plurality of grooves being extending and to the contact face, each sub-contact elements having a length Ls between the plurality of grooves and the at least one incision or between two incisions, an outermost portion of each the sub-contact element having a radius Rs smaller than a radius Rt of an outline OL of the tread at an intersection between the outline OL and the outermost portion, the radius Rs of the outermost portion of the sub-contact elements is smaller than or equal to 16.0 mm and greater than or equal to 5.0 mm.

A tire comprises a tread provided with two edges (25A, 25B) and with a center (C) dividing it into two parts of equal width with sets of blocks (21A, 21B). Each set of blocks (21A, 21B) comprises three zones: at the edge (211), at the center (213) and intermediate (212). Each set of blocks (21A, 21B) comprises a set of chamfers (26A, 26B, 26C) which extends over at least the edge zone (211) and the central zone (213) of the set of blocks (21A, 21B). The width LC1 of the set of chamfers (26A, 26B, 26C) over the edge zone (211) is different from the width LC2 of the set of chamfers (26A, 26B, 26C) over the intermediate zone (212), the widths LC1 and LC2 being comprised between 0.5 mm and 2.5 mm.

A tire comprises a directional tread provided with two edges (25A, 25B) and with a center (C) dividing it into two parts of substantially equal width. The tread comprises, on one of these two parts, blocks (21A, 21B) succeeding one another in a circumferential direction. Each block (21A, 21B) has a leading-edge face (26) and a trailing-edge face (27). The tire comprises, for at least one set of blocks (21A, 21B), at least one set of cavities (29) extending over the trailing-edge face (27) of the set of blocks (21A, 21B). The tread has a bottom surface (24) radially on the inside of the tread, the set of blocks (21A) having a height H, wherein the set of cavities (29) is between the bottom surface (24) of the tread and half of the height H.

In a pneumatic tire, an elongation at break (EB) of carcass cords constituting a carcass layer satisfies a condition of EB≥15%. A tread portion includes a pair of center main grooves each extending in a tire circumferential direction with a tire equator line interposed therebetween, and a center land portion defined by the pair of center main grooves. A ratio (Wc/Wb) of a width (Wc) of the center land portion to a width (Wb) of a widest belt within a belt layer in the tire width direction satisfies a condition of 0.10≤Wc/Wb≤0.20. An elongation at break (EB) of the carcass cords and the ratio (Wc/Wb) of the width (Wc) of the center land portion to the width (Wb) of the widest belt satisfy a condition of 350≤10×1/(Wc/Wb)+20×EB≤900.

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).