The invention relates to a pneumatic vehicle tire having a tread with profile block rows (1, 2) with profile blocks (5) delimited by channels (3, 4), which channels (3, 4) form T-shaped intersections in plan view and are delimited by a channel base (6, 6) and by block flanks (5a, 5a), wherein, in channels (3), there are formed projections (7, 7) which, in a radial direction, have at their highest point a height (h.sub.1, h.sub.1), in relation to the lowest point of the channels (3), of 10% to 80% of the profile depth. The projections (7, 7) are positioned in intersection regions of T-shaped intersections of the channels (3, 4) and are attached to that block flank (5a) which is situated opposite the opening-in point of the opening-in channel (4).

A tire comprises a tread portion for which an intended tire rotational direction is specified. The tread portion comprises rows composed of blocks circumferentially divided by lateral grooves. Each block has a ground contacting top surface, and a first side wall surface and a second side wall surface located on a heel-side and a toe-side, respectively, in the intended tire rotational direction. In a cross section of each block which is parallel with the tire circumferential direction, the first and second block-side wall surfaces are both inclined, and the angle 2 of the second side wall surface is larger than the angle 1 of the first side wall surface with respect to the tire radial direction. The difference 21 between the angles 2 and 1 increases toward one side in the tire axial direction.

Provided is a motorcycle pneumatic tire in which the wet grip performance is improved while the steering stability during turning is ensured. The motorcycle pneumatic tire includes, on its ground-contact surface: a first inclined groove (21) that extends on a tire width-direction outer side from the vicinity of a tire equator and is inclined in the same direction as a tire rotation direction; and a short groove (22) that is arranged on the extension of a tire width-direction outer end of the first inclined groove (21). The tire width-direction outer end of the first inclined groove is positioned in the vicinity of a point at of a tread width (TW) from the tire equator on the tire width-direction outer side, while a tire width-direction inner end of the short groove is positioned in a range of to 5/16 of the tread width (TW) from the tire equator on the tire width-direction outer side; an inclination angle of the first inclined groove with respect to a tire circumferential direction increases toward the tire width-direction outer side; and an angle .sub.A formed by a groove wall of the tire width-direction outer end of the first inclined groove with respect to the direction perpendicular to the tire surface, and an angle .sub.B formed by a groove wall of the tire width-direction inner end of the short groove with respect to the direction perpendicular to the tire surface, satisfy a relationship of .sub.A>.sub.B.

Provided is a tire comprising, a shoulder land portion includes a width direction groove, the width direction groove comprises a first width direction groove portion that communicates with the circumferential groove, and a second width direction groove portion adjacent to and continuous with a tread ground contact edge side of the first width direction groove portion, the first width direction groove portion includes a narrowed groove portion in a region of at least a part of the first width direction groove portion in an extending direction of the first width direction groove portion, and respective groove widths of the circumferential groove, the first width direction groove portion and the second width direction groove portion satisfy a relational expression the groove width of the circumferential groove>the groove width of the first width direction groove portion>the groove width of the second width direction groove portion.

A tire that can improve braking performance on a dry road surface and wet performance is provided. The tire includes a tread portion 2. The tread portion 2 includes a shoulder land portion 5 disposed at an endmost tread edge side. The shoulder land portion 5 has a plurality of shoulder lateral grooves 10 that fully traverse the shoulder land portion 5. Each shoulder lateral groove 10 includes, in a transverse cross-section orthogonal to a longitudinal direction thereof, a bottom portion 11, a groove wall main body 12 extending from the bottom portion 11 outward in a tire radial direction, and a chamfered portion 15 between a ground-contact surface of the shoulder land portion 5 and the groove wall main body 12. The chamfered portion 15 is titled at an angle of 5 to 30 relative to a tread profile 13 obtained by extending the ground-contact surface.

A pneumatic tire includes a shoulder land portion and a narrow groove in a tread surface. The narrow groove extends in the tire circumferential direction and sections the shoulder land portion into a main land portion and a sub land portion. A first groove portion extends in parallel to the tire equator surface from the tread surface toward an inner side in a tire radial direction. A second groove portion is provided closer to the inner side in the tire radial direction and the tire equator surface side than the first groove portion, and extends in parallel to the tire equator surface. A connection portion is connected to the first groove portion and the second groove portion. A groove bottom portion is provided in an end portion of the second groove portion and has a widened groove width by depressing a groove wall of the second groove portion.

A pneumatic tire includes a tread portion provided with central blocks on both sides of a tire equator. Each of the central blocks includes a ground contact surface with an axially outer block edge and an outer block sidewall extending radially inwardly from the outer block edge. Each outer block edge includes a first inclined edge and a second inclined edge in an opposite inclination direction to the first inclined edge. The first inclined edge has an average angle of from 75 to 85 degrees and the second inclined edge has an average angle of from 30 to 50 degrees, with respect to the axial direction of the tire. Each outer block sidewall includes a middle portion and a pair of end portions, wherein the middle portion is inclined gently with respect to the end portions in relation to a radial direction of the tire.

The disclosed technology relates generally to a pneumatic tire, and more particularly to a pneumatic tire capable of enhancing running performance on wet surfaces (wet performance) without reducing of running performance on dry surfaces (dry performance) by having an improved groove structure. In one aspect, a pneumatic tire includes a tread, a sidewall and a bead, wherein the tread has a block and a groove formed thereon. First inclined portions inclined toward the bottom of the groove on the side of the groove are alternately installed in a longitudinal direction of the groove.

Pneumatic vehicle tire, in particular a commercial vehicle tire, having a tread which has a profile and has at least one circumferential groove (1) which is encircling in the circumferential direction, is embodied to a profile depth (P.sub.T) and in the cross section, starting at the tread external face, is composed of three adjoining groove portions, one outer groove portion (2) that expands in a funnel-shaped manner toward the outside, one 1 mm to 3 mm wide contracted groove portion, and one inner groove portion (4) which lies radially inward, is expanded in relation to the contracted groove portion (3) and has the largest cross-sectional face of all portions, and which is delimited by two cover flanks (4a), lateral groove flanks (4b, 4b) that adjoin said cover flanks (4a), and a groove base (4c). The lateral groove flanks (4b, 4b) in the expanded groove portion (4), while reducing the mutual spacing thereof from the groove base (4c), run at an angle () of 5 to 25 in relation to the radial direction and in the direction of the circumferential extent of said lateral groove flanks (4b, 4b) run in a wave form

This pneumatic tire comprises a tread portion, sidewall portions, and bead portions, wherein the tread portion includes five main grooves extending in the tire circumferential direction that partition six rows of ribs, a plurality of first sipes is formed in each edge portion of center ribs, intermediate ribs, and shoulder ribs, a plurality of first narrow grooves is formed in each of the center ribs and the intermediate ribs so as to form a connection between the main grooves, a plurality of second narrow grooves is formed in each of the center ribs and the intermediate ribs so as to connect the first narrow grooves, an interval Pg.sub.1 of the first narrow groove is from 20 mm to 60 mm, and an interval Ps.sub.1 of the first sipe is from 15% to 45% of the interval Pg.sub.1 of the first narrow groove.