A tire comprises a directional tread (10), said tread comprising a central axis (12) and two edges (14A, 14B) a tread width W being greater than or equal to 140 mm, said tread (10) comprising a plurality of patterns (13) which succeed one another in the circumferential direction, each pattern having a pitch P, the patterns (13) delimiting a plurality of oblique grooves (16A, 16B), each oblique groove extending from one of the edges (14A, 14B) of the tread as far as the central axis (12). In a central part of the tread centered on the central axis (12) and of a width corresponding to 80% of the width W of said tread, all or some of the oblique grooves (16A, 16B) of the plurality of oblique grooves have a prescribed slenderness ratio, and all or some of the patterns comprise at least one sipe and have a prescribed sipes density SD.

The present technology provides a heavy duty pneumatic tire with a tread portion having a tread pattern including: a pair of circumferential primary grooves defined in a wave-like shape and extending in the tire circumferential direction; center lug grooves; center blocks; and circumferential secondary grooves extending in regions of the center blocks and open to the center lug grooves. The center lug grooves have two groove turning portions turned in a bend shape or a curved shape. The circumferential secondary grooves extend in an inclined manner relative to the tire circumferential direction. An inclination angle (θ.sub.4) of the circumferential secondary grooves relative to the tire circumferential direction is different from an inclination angle (θ.sub.1) of portions of the circumferential primary grooves relative to the tire circumferential direction, the portions extending toward the same side as a side in the tire width direction, toward which the circumferential secondary grooves are inclined.

A bias-ply motorcycle tire comprises a tread portion provided with main grooves and sipes. The main grooves extend from a tread crown region into tread shoulder regions. The sipes are provided only within the tread shoulder regions.

A pneumatic vehicle tire, in particular a commercial vehicle tire, having a tread with transverse grooves (3, 3′), which are continuous over the tread width and which, at least in sections, are formed to the profile depth and are the main grooves of the tread. Circumferential grooves (4) that run adjacent to one another in pairs and parallel to one another, at an angle (α) with respect to the circumferential direction of 10° to 30° and have a smaller depth than the profile depth divide the tread, with two sections (4a) in each case between three transverse grooves (3, 3′) following one another in the circumferential direction, into profile blocks (1, 2), wherein pairs of circumferential grooves following one another in the circumferential direction are offset with respect to one another in the axial direction, such that the circumferential grooves (4) of the pairs of circumferential grooves begin and end at substantially the same axial positions, wherein each circumferential groove (4) reaches, with a section (4b) running beyond a transverse groove (3), into a middle profile block (2) present between the circumferential grooves (4), and wherein each circumferential groove (4) is formed shallower in at least one section (4a, 4b) than in its other sections or its other section.

A motorcycle tire has a tread portion. The tread portion has a ground contact surface curved in an arc shape convex outward in a tire radial direction. The ground contact surface includes a central region and a first outer region. The ground contact surface has oblique grooves each including a portion inclined with respect to a tire circumferential direction. Each of the oblique grooves extends across the central region and the first outer region. Each of the oblique grooves includes a vertical groove portion extending at an angle α of 20 degrees or less with respect to the tire circumferential direction. A minimum distance in a tire axial direction along the ground contact surface between the vertical groove portion and an outer edge of the central region is 30% or less of a maximum width in the tire axial direction of the central region along the ground contact surface.

A pneumatic tire includes shoulder lands and a center land, defined by main grooves on both sides of an equator in a zigzag pattern along a circumferential direction, are defined in a tread. Shoulder lug grooves extending in a width direction are formed in each of the shoulder lands. First and second center lug grooves, which extend from the shoulder lug grooves across each of the main grooves and are inclined at an angle of 45°-70° with respect to the width direction, are disposed in the center land. The first center lug groove terminates at the equator, and the second center lug groove terminates without reaching the equator. The first and second center lug grooves are alternately disposed in the circumferential direction. Connecting grooves inclined in an opposite direction to an inclination direction of the center lug grooves to connect the center lug grooves are formed in the center land.

A tread portion includes a land portion provided with lateral groove-shaped elements arranged in a first array. Each lateral groove-shaped element extends from a first end to a second end. In the first array, the second end of one of the lateral groove-shaped elements is located at the circumferential same position as the first end of another of the lateral groove-shaped elements. Each lateral groove-shaped elements includes a first portion on the first end side, a second portion on the second end side, and a third portion therebetween. The first, second, and third portions are inclined in the same direction. An angle θ3 of the third portion to the tire circumferential direction is smaller than angles θ1 and 02 of the first and second portions, and a length of the third portion is greater than a sum of lengths of the first and second portions.

A tread portion includes land portions divided by circumferential grooves. The land portions are provided with a set of lateral groove-shaped elements inclined with respect to tire axial and circumferential directions. Each lateral groove-shaped elements includes a circumferential first and second ends. The set of lateral groove-shaped elements is arranged in a first array over an entire circumference of the tire. The first array is such that in each of all pairs of two lateral groove-shaped elements adjacent to each other in the tire circumferential direction of the lateral groove-shaped elements, the first end of one of the two lateral groove-shaped elements is located at a circumferential same position as the second end of the other one of the two lateral groove-shaped elements. Two lateral groove-shaped elements included in at least one pair of the all pairs are formed on different land portions from one another.

The tire has a tread portion for which an intended tire rotational direction is specified. The tread portion comprises first inclined land portions defined between first inclined grooves. The first inclined land portion comprises an outer portion having a first wall surface and a second wall surface, and an inner portion having a third wall surface and a fourth wall surface. The angle θ1 of the first wall surface is smaller than the angle θ2 of the second wall surface, and the angle θ3 of the third wall surface is larger than the angle θ4 of the fourth wall surface.

A tyre includes a tread portion being provided with two circumferential grooves extending in a tyre circumferential direction to form a crown land portion therebetween. The crown land portion is provided with two or more crown grooves extending inwardly of the crown land portion from the respective circumferential grooves. Each crown groove includes wide-width regions and narrow-width regions having a groove width smaller than that of the wide-width regions, and the wide-width regions and the narrow-width regions are alternated.