A tire includes an annular tread portion with a circumferentially extending groove having bridge structures at circumferential intervals about the groove and contoured pockets therebetween. Each pocket has curved transition surfaces separating the bridge structures from curved base surfaces of the pocket. The curved transition surfaces have radii of curvature between 2.0 mm and 4.0 mm. The curved base surfaces may radii of curvature between 4.0 mm and 8.0 mm.

A tire includes an annular tread portion including a first circumferentially extending asymmetric shoulder groove having an angled axially inner sidewall with an axially inner sidewall radial angle between 170° and 180°, an angled axially outer sidewall with an axially outer sidewall radial angle between 155° and 170°, and a curved base surface with a radius of curvature ranging from 40.0 mm at an axially inner edge and 20.0 mm at an axially outer edge.

The pneumatic tire of this disclosure includes on a tread surface four or five circumferential grooves, and includes a pair of shoulder land portions, a pair of intermediate land portions, and one or a pair of central land portions partitioned thereon, wherein: in a tread widthwise cross sectional view at an unloaded condition when the tire is mounted to an applicable rim and applied with a prescribed internal pressure, when drawing a virtual arc R1 protruding to a tire radial outer side, of which a center of curvature is located on a tire equatorial plain, across four tread widthwise edges adjacent to the circumferential grooves of outlines of the pair of intermediate land portions, a correlation among each protrusion amount t1, t2 and t3 of outlines of the central land portions, the intermediate land portions and the shoulder land portions from the virtual arc R1 satisfies:

t1<t2, and t3<t2.

The pneumatic tire of this disclosure comprises on a tread surface one or more land portions, wherein the land portions is formed into a protruding shape such that its tire radial outline in a tire widthwise cross section protrudes to a tire radial outer side, the outline includes, in the tire widthwise cross section, at least a first arcuate surface having a radius of curvature of a tire widthwise center of the land portion, and second arcuate surfaces having radiuses of curvature smaller than the first arcuate surface and located on both tire widthwise edges of the land portion, sipes extending in the tire width direction are formed on the land portions formed into the protruding shape, the sipes have chamfer portions, and the chamfer portions have chamfer widths on at least one of both tire widthwise edges larger than chamfer widths on the tire widthwise center.

The tread profile of a vehicle tire has a circumferential rib. Grooves are formed in the circumferential rib with a width, which increases along its entire extent, wherein the grooves are formed with a vertex point between a first portion and a second portion. The groove direction from the beginning to the vertex point is formed with a greater directional component in the circumferential direction than in the axial direction and between the vertex point and the entry into the circumferential groove is formed with a greater directional component in the axial direction than in the circumferential direction. The groove is formed in the first portion with a depth T.sub.1, which increases continuously from the beginning over the first portion up to reaching its maximum value T.sub.1max at the vertex point and is formed with a constant depth T.sub.2 in the second portion wherein T.sub.2≥T.sub.1max.

Tread having a plurality of generally circumferentially orientated grooves delimiting a plurality of relief elements, this tread further comprising a plurality of cut-outs in the form of transversely orientated grooves and/or slits, each relief element comprising a contact face intended to come into contact with the road and lateral faces cutting this contact face along edges intended to come into contact with a road during running, this tread having chamfers on at least a plurality of transverse edges of the relief elements, this tread having, in straight-line running, a total contact surface S comprising a part Sc in which all the transverse edges have chamfers and a part Snc in which all the transverse edges are free of chamfers, this tread having, in a cornering maneuver corresponding to a transverse acceleration of 0.3 g (where g is the acceleration due to gravity), a total footprint surface S* formed by a part Sc* comprising chamfers on all the transverse edges of its relief elements and a part Snc* free of any chamfer, this tread being such that the ratio Snc/Sc is equal to not more than 2% and that the ratio Snc*/Sc* is equal to or greater than 10%.

A pneumatic tire comprises a tread portion provided on each side of the tire equator with a middle land portion defined between a shoulder main groove and a crown main groove each extending continuously in the tire circumferential direction. The middle land portion is provided with axially inside middle lug grooves and axially outside middle lug grooves arranged alternately in the tire circumferential direction. The axially inside middle lug groove is connected to the crown main groove at an angle θ1 of from 20 to 45 degrees with respect to the tire circumferential direction and has an axially inner opened end and an axially outer closed end. The outside middle lug grooves is connected to the shoulder main groove at an angle θ2 of from 60 to 80 degrees with respect to the tire circumferential direction and has an axially outer open end and an axially inner closed end. The tread portion may be provided with a shoulder land portion comprising circumferential sipes, axial grooves terminating at the circumferential sipes, and a circumferentially continuous rib.

Provided is a motorcycle tire having improved wet performance during straight running without compromising other performances. The motorcycle tire is a motorcycle tire whose rotation direction when mounted on a vehicle is designated. A main groove (10) at least including a first groove (11) and a second groove (12) having different inclination directions, and a sub groove (20) are provided on a tire tread, the main groove and the sub groove are alternately repeatedly formed in the tire circumferential direction line symmetrically with respect to the tire equator and are arranged offset in the tire circumferential direction between one side and the other side in the tire width direction, and the main groove and the sub groove include, per one pitch of pattern on one side in the tire width direction within the contact region S during straight running, two or more outward grooves extending obliquely from the tire equator side to the outside in the tire width direction toward the designated reverse rotation direction of the rotation direction and one or more inward grooves extending obliquely from the outside in the tire width direction to the tire equator side toward the designated reverse rotation direction of the rotation direction.

A pneumatic tire has a tread portion 2 provided with: an outboard shoulder main groove 4 and an outboard crown main groove 6 extending circumferentially of the tire; first outboard shoulder axial grooves 12a extending from an outboard tread edge Teo to the outboard shoulder main groove 4; second outboard shoulder axial grooves 12b extending from the outboard tread edge Teo and terminating without reaching to the outboard shoulder main groove 4; first outboard middle axial grooves 16 extending from the outboard shoulder main groove 4 and terminating without reaching to the outboard crown main groove 6; and second outboard middle axial groove 22 extending from the outboard crown main groove 6 and terminating without reaching to the outboard shoulder main groove 4. The first outboard middle axial grooves 16 are aligned with the first outboard shoulder axial grooves 12a, respectively, so as to smoothly continue to the first outboard shoulder axial grooves 12a through the outboard shoulder main groove 4.

A pneumatic tire comprises a tread portion which is asymmetric about a tire equatorial plane. The tread portion comprises a first land portion on a vehicle outer side, and a second land portion on a vehicle inner side. The first land portion comprises a circumferential narrow groove extending in a circumferential direction, a plurality of first auxiliary grooves that pass through the circumferential narrow groove and are disposed at periodic intervals in the circumferential direction, first blocks defined by the plurality of first auxiliary grooves, and first narrow grooves that pass through the circumferential narrow groove and are disposed in the first blocks. The second land portion comprises a plurality of second auxiliary grooves disposed at periodic intervals in the circumferential direction, second blocks defined by the plurality of second auxiliary grooves, and second narrow grooves disposed in the second blocks.