Tire (1) for an agricultural vehicle and more particularly to the tread (2) thereof. The tread has a radial thickness H.sub.max and comprises a middle part (20) and two lateral parts (21, 22), the meridian profile (P.sub.S) of the radially outer surface (31, 32) of each lateral part (21, 22) is radially on the inside of the meridian profile (P.sub.C) of the radially outer surface (30) of the middle part (20) and the radial distance (d) between the midpoint (I.sub.1, I.sub.2) of the meridian profile (P.sub.S) of the radially outer surface (31, 32) of each lateral part (21, 22) and the meridian profile (P.sub.C) of the radially outer surface (30) of the middle part (20) is at least equal to 0.5 times the radial thickness H.sub.max of the tread (2).

A pneumatic tire, includes: an annular-shape tread portion; a sidewall portions; and bead portions. JIS hardness of tread rubber is within a range of 40 to 60 and snow traction index is 180 or higher. A rib positioned between circumferential grooves is demarcated in a center region of the tread portion. Closed grooves are formed in the rib. The closed grooves are inclined with regard to a tire axial direction such that a closed end faces a leading side. A groove wall of the closed groove on the leading side protrudes more outward in the tire axial direction than a groove wall on a trailing side. A difference between angles ?1 and ?2 of the groove walls on the leading and trailing sides of the closed grooves, respectively, with regard to the tire axial direction is within a range of 0???1-?2?5?.

Tread (10) for agricultural tire (1) comprising a plurality of lugs protruding from the ground of the tread (11) in radially outer direction extending at a given inclination angle from a central portion of the tread toward both axial ends of the tread and alternately arranged at given intervals in the circumferential direction on one side and on the other with respect to the equatorial plane of the tire. The lugs (2) comprising a stepping-in surface (21) wherein the stepping-in surface (21) of at least one lug (2) comprises on its sidewall a first radially outer, concave surface (211) and a second, radially inner, concave surface (212) intersecting each other in a transition point (D) when viewed in a circumferential section.

The tire has a tread which is intended to come into contact with the ground and which comprises a plurality of lugs separated from one another by grooves. Each lug extends radially outwards, over a radial height H, from a bottom surface as far as a contact face. The grooves are made up of the portions of the bottom surface that separate the lugs. The tread comprises a rubber composition based on at least one synthetic elastomer which predominates by weight, this synthetic elastomer comprising at least one butadiene-styrene copolymer, SBR, the SBR having a content greater than or equal to 20 parts per hundred rubber, phr, a reinforcing filler predominantly comprising carbon black. The composition comprises an aromatic dicyclopentadiene plasticizing resin essentially comprising styrene, ethylene and dicyclopentadiene units, at a content ranging from 2 to 40 phr, the composition containing under 5 phr of another plasticizer.

A pneumatic vehicle tire including a utility vehicle tire has a tread with profile positives which are separated from one another in a circumferential direction by transverse channels which extend continuously from the central region of the tread as far as the lateral tread edges, respectively. The transverse channels are main channels of the tread and, at least over the major part of the course thereof, have the maximum provided profile depth. The transverse channels are provided, on the respective channel base thereof, with a row of base elevations formed so as to be distributed over the entire course of the transverse channels. The base elevations are attached to the channel flanks of the transverse channels and are configured such that their rubber volume becomes smaller the closer to the tread edge they are disposed.

The invention is directed to a pneumatic vehicle tire having a tread with profile positives which are separated from one another in a circumferential direction by transverse channels which extend continuously from the central region of the tread to the lateral tread edges and which are main channels of the tread and which, at least over the major part of the course thereof, have the maximum provided profile depth. The tread has, as profile positives, two rows of transverse ribs which are of encircling form in the circumferential direction and which are separated from one another by respective transverse channels. The tread is of directional configuration, wherein the transverse ribs of one row, and thus the transverse channels running between the transverse ribs, run, with respect to the axial direction, oppositely in relation to the transverse ribs and transverse channels of the other row.

A tread profile is divided into two parts in the axial direction (A) of the tire and has two axially adjacent profile block rows, each of which is formed from profile block elements that are arranged one behind the other over the circumference of the tire and are separated from one another by inclined grooves. The inclined grooves of one profile block row are configured to slope along the axial extent of the inclined grooves through the profile block row, starting from the other profile block row, such that the main direction of extent of the inclined grooves forms an angle of inclination relative to the axial direction (A). The inclined grooves of one profile block row have a direction of inclination which is oriented oppositely to that of the inclined grooves of the other profile block row when seen in the circumferential direction (U).

Tire made of rubbery material comprising a tread (1) of width W that is delimited by at least one edge (3). The tread comprises a plurality of blocks (5), each block being delimited by at least one lateral wall (7) that extends mainly in an axial direction Y in the direction of the edge (3). The lateral wall (7) has a length L in this axial direction Y, where L is greater than 35% of the width W of the tread. The lateral wall also exhibits an inclination angle (a) with respect to a radial direction (Z), said inclination angle (a) evolving in the axial direction Y, this evolution being continuous.

Provided is a motorcycle tire (1) for traveling on rough terrain, the tire having a block (10) provided to a tread section (2). The block (10) has the following: a block lateral surface body part (15) that extends straight from the edge of a tread surface (12) inward in the tire radial direction; and a skirt section (20) that connects the block lateral surface body part (15) and a groove bottom surface (9). The skirt section (20) has the following: a flat section (21) that extends in a straight line on the groove bottom surface (9) side; and a curved section (22) that connects, in a beveled arc, the area between the flat section (21) and the block lateral surface body part.

A pneumatic tire includes at least four circumferential main grooves extending in a tire circumferential direction and at least five land portions defined by the at least four circumferential main grooves. A center land portion includes a plurality of center lug grooves extending through the center land portion in a tire lateral direction and disposed at predetermined intervals in the tire circumferential direction, and a plurality of center blocks that are defined by the plurality of center lug grooves. The center blocks each include a narrow shallow groove that extends through the center block in the tire lateral direction and that remains open when the tire comes into contact with the ground.