A pneumatic tire (10) has, in the surface of the tread (11), a central circumferential groove (12) located at the center of the contact patch width and extending circumferentially around the tire, a plurality of longitudinal grooves (13 (13a, 13b)) formed on the axially outside of the central circumferential groove (12), lug grooves (15), and blocks (16 (16a to 16c)) defined by the central circumferential groove (12), the longitudinal grooves (13), and the lug grooves (15). Each of the lug grooves (15) is formed such that its width in the shoulder region is greater than its width in the central region, and the sum of the groove area of the central circumferential groove (12) and the groove area of the longitudinal grooves (13) is smaller than the area of the lug grooves (15). As a result, the pneumatic tire (10) not only secures the wet braking performance and wear resistance performance on paved roads, but also improves the acceleration performance and braking performance and the steering stability performance on snowy roads.

A pneumatic tire (10) has, in the surface of the tread (11), a central circumferential groove (12) located at the center of the contact patch width and extending circumferentially around the tire, a plurality of longitudinal grooves (13 (13a, 13b)) formed on the axially outside of the central circumferential groove (12), lug grooves (15), and blocks (16 (16a to 16c)) defined by the central circumferential groove (12), the longitudinal grooves (13), and the lug grooves (15). Each of the lug grooves (15) is formed such that its width in the shoulder region is greater than its width in the central region, and the sum of the groove area of the central circumferential groove (12) and the groove area of the longitudinal grooves (13) is smaller than the area of the lug grooves (15). As a result, the pneumatic tire (10) not only secures the wet braking performance and wear resistance performance on paved roads, but also improves the acceleration performance and braking performance and the steering stability performance on snowy roads.

A tire having high on-ice starting performance, the tire is provided with a plurality of circumferential direction grooves formed on a tread of the tire and extending in a tire circumferential direction, a plurality of width direction grooves extending in a direction intersecting the tire circumferential direction, a plurality of blocks demarcated by the circumferential direction grooves and the width direction grooves, and a plurality of width direction sipes formed on surfaces of the blocks and extending in the direction intersecting the tire circumferential direction, in which a distance P between the sipes 18z is set in a range of 4-12 mm.

A tire having high on-ice starting performance, the tire is provided with a plurality of circumferential direction grooves formed on a tread of the tire and extending in a tire circumferential direction, a plurality of width direction grooves extending in a direction intersecting the tire circumferential direction, a plurality of blocks demarcated by the circumferential direction grooves and the width direction grooves, and a plurality of width direction sipes formed on surfaces of the blocks and extending in the direction intersecting the tire circumferential direction, in which a distance P between the sipes 18z is set in a range of 4-12 mm.

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 has main grooves; land portions which are sectioned by the main grooves; paired notches which face to each other as well as being open to a tread surface; the notches being concave portions which are formed in side surfaces of two land portions which are adjacent across the main grooves; tie bars which protrudes at a predetermined height from groove bottoms of the main grooves and connect between the paired notches; and dimples which are provided in the middle in a width direction of the tie bars. The dimples are arranged at least in a notch internal region which is surrounded by wall surfaces of the notches among the tie bars.

A tire (1) comprising a tread (8), this tread comprising at least one channel (2), at least one wear indicator (3) disposed on the bottom of the channel (2), the wear indicator comprising a contact face (7) intended to come into contact with a road surface when the tire reaches a wear limit, the channel (2) comprising a texture (4) surrounding the wear indicator (3) and contrasting with the contact face (7) of the wear indicator.

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.

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.