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

The present invention provides a pneumatic tire including a tread block 10 having a sipe 100 formed therein. A three-dimensional inclined surface groove 110 is formed at an upper portion of the sipe 100 formed in the tread block 10, such that three-dimensional inclined surface protrusions 16 and inclined surface grooves 17 respectively formed on both sipe side wall surfaces 15 forming the sipe 100 so as to correspond to each other may minimize a movement of the tread blocks 10 due to a stress generated from the tire contacting with a ground during driving, so as to increase a traction force. In addition, a lower through groove is formed at a lower portion of the sipe 100 formed in the tread block 10, such that it is possible to reduce a resonance noise of the tire occurring when driving, more easily and automatically discharge the foreign matters caught in the sipes 100 of the tire during driving, and improve a traction performance of the tire in the latter half of the tire lifespan by dividing the remaining tread block 10 after the upper portion of the tread block 10 is worn.

A tire tread (1) for a heavy-duty vehicle to improve resistance to attack by stones. The tread (1) in the new state having at least one complex cut (5) with, along a mean line (Lm), an alternation of external cavities (6), opening onto the tread surface (2), and internal cavities (7), not opening onto the tread surface (2), two consecutive cavities, respectively an external cavity (6) and an internal cavity (7), being connected to each other by a connecting channel (8) of non-zero length, the height (H11) of each external cavity (6) being at least equal to half the height (H) of the complex cut (5), the height (H3) of each connecting channel (8) being at most equal to one third of the height (H) of the complex cut (5).

A pneumatic tire of the present disclosure includes, on a tread surface, a plurality of circumferential main grooves extending in the tire circumferential direction, and a plurality of land portions defined between circumferential main grooves adjacent in the tire width direction among the plurality of circumferential main grooves or by the circumferential main grooves and tread edges. The land portions include at least one circumferential sipe extending in the tire circumferential direction. The circumferential sipe includes a plurality of widened portions arranged in the tire circumferential direction. In a reference state, each widened portion is formed only from a portion that, from one side towards the other side in the tire circumferential direction, extends from the tread surface inward in the tire radial direction.

The pneumatic tire for passenger vehicles according to the present disclosure comprises a carcass consisting of plies of radially arranged cords, spanning toroidally between a pair of bead portions; the cross-sectional width SW and the outer diameter OD of the tire satisfy a given relationship; the land portion has a plurality of width direction sipes extending in the tire width direction; the pitch length in the tire circumferential direction of the plurality of width direction sipes is 3 mm to 10 mm; and the width direction sipe has a widened portion on the sipe bottom side where the sipe width is larger than that on the tread surface side.

A green tire includes a plurality of sheets of green rubber having a substantially circular shape, with each sheet having a tread region disposed along a circumference. A plurality of objects are sandwiched between adjacent sheets of green rubber in the tread region. Each object is constructed of a material selected from the group consisting of steel, polyester, nylon, carbon fiber, aramid, fiber glass, cotton, hemp, polyurethane and other plastic, other synthetic or natural fibers and other metal materials.

A tread (12) for a tire (10) which has a tread surface intended to contact a road surface during running. The tread (12) has at least one cavity opening onto the tread surface when new, called external cavity (14), which has length L, width W and central plane P. The external cavity (14) has bottom (16) and at least two opposite lateral walls (18a, 18b) extending from bottom (16) and a mechanism (20) for ejecting stones during running, which has two protuberances (22a, 22b) from bottom (16) of external cavity, which are disposed at least partially opposite one another at a distance d. Each protuberance (22a, 22b) is inclined respectively from a lateral wall (18a, 18b) of the external cavity (14) towards the central plane P. The distance d between the two protuberances (22a, 22b) is less than or equal to 10% of width W of external cavity (14).

The pneumatic tire for passenger vehicles according to the present disclosure comprises a carcass consisting of plies of radially arranged cords, spanning toroidally between a pair of bead portions; the cross-sectional width SW and the outer diameter OD of the tire satisfy a given relationship; the tire has a tread portion with tread rubber; the rubber gauge of the tread portion is 2 mm or more and less than 5 mm; and the tread surface of the tread portion has one or more land portions, and a width direction sipe extending in the tire width direction is formed in the land portion so that there are two or more of the width direction sipes in the contact patch.

The pneumatic radial tire for passenger vehicles according to the present disclosure comprises a carcass consisting of plies of radially arranged cords, spanning toroidally between a pair of bead portions; the cross-sectional width SW and the outer diameter OD of the tire satisfy a given relationship; the tire has a tread portion with tread rubber; the rubber gauge of the tread rubber is 2 mm or more and less than 5 mm; and the negative ratio of the tread surface of the tread portion is 20% or less.

In particular embodiments, a tire tread includes one or more lateral sipes (26s) arranged within the tread (20). As each such lateral sipe (26s) extends outward from within the tread thickness (T20) and towards the outer, ground-engaging side (22) of the tread (20), the lateral sipe (26s) is inclined towards the intended direction (R) of tire rotation. The lateral sipe (26s) also has a width (W26) (thickness) configured to, at an unworn stage, close along at least a portion of the sipe depth during operation of a loaded tire, and being configured to, at a worn stage, remain open during operation of the loaded tire. The lateral sipe (26s) has a width-to-height ratio associating the sipe width (W26) to the sipe height, the width-to-height ratio equaling 1:10 to 1:40. Providing a plurality of these lateral sipes (26s) may result in improved consistency of tread wear performance over the life of the tread (20).