Tread (1) of a tire for an off-road vehicle, with total width (W) and total thickness of wearable material at least equal to 60 mm. The tread is delimited axially by shoulder regions (5) provided with grooves (7). This tread (1) comprises, in central region (6), narrow groove (61) and, between each shoulder region (5) and the central region (6), an intermediate region (4) in which there are formed a plurality of oblique or transverse narrow grooves (411, 412). Narrow groove (61) of the central part is made up of first narrow-groove parts (611) of depth (P1) and of second narrow-groove parts (612) of depth (P2). Depth (P1) is greater than depth (P2). Narrow grooves (411, 412) of one same intermediate region comprise, in the circumferential direction, an alternation of narrow grooves (411) of first depth (P11) and of narrow grooves (412) of second depth (P22).

A tread block arrangement suitable for a tire or for a tread band for a tire. The tread block arrangement comprises a tread block that limits a first primary sipe. The first primary sipe comprises at least a first deep part and a second deep part separated from the first deep part by a first shallow part. A depth of the first deep part is at least three times a depth of the first shallow part and a depth of the second deep part is at least three times the depth of the first shallow part. The first deep part is limited in a longitudinal direction of the first primary sipe by a primary first end wall and a secondary first end wall such that a first angle between the primary first end wall and the secondary first end wall is from 1 degree to 30 degrees. The second deep part is limited in a longitudinal direction of the first primary sipe by a primary second end wall and a secondary second end wall such that a second angle between the primary second end wall and the secondary second end wall is from 1 degree to 30 degrees.

An outer shoulder land region includes first shoulder lateral grooves each extending axially inwardly from an outer tread ground contact edge to have a first inner end in the tyre axial direction within the outer shoulder land region, first outer shoulder lateral sipes each connecting between the first inner end and an outer shoulder main groove, and second outer shoulder lateral sipes each extending axially inwardly from the outer tread ground contact edge to have a second inner end positioned on an axially outer side of the first inner ends. An outer middle land region includes outer middle lateral sipes each smoothly connected with the respective first outer shoulder lateral sipe with the outer shoulder main groove therebetween. Each of the outer middle lateral sipes connects between the outer shoulder main groove and an outer crown main groove and has a third inner end within the outer middle land region.

A tyre includes a crown land portion, an outboard middle land portion, an outboard shoulder land portion, an outboard crown circumferential groove, an outboard shoulder circumferential groove, an inboard middle land portion, an inboard shoulder land portion, an inboard crown circumferential groove, and an inboard shoulder circumferential groove. The outboard middle land portion is provided with full-opened outboard middle sipe that are inclined to a tyre axial direction. The outboard middle sipes each have two opposite sipe-edge portions provided with chamfer portions. In each chamfer portion of each outboard middle sipe, chamfer widths at both ends of the outboard middle sipe are larger than a chamfer width of a central portion of the outboard middle sipe. The outboard shoulder land portion is provided with outboard shoulder sipes that are inclined in the same direction as the outboard middle sipes to the tyre axial direction.

Pneumatic tire comprising a tread (1) provided with two edges (2), a center (3) and a plurality of tread bars (10) distributed in a circumferential direction, each tread bar (10) extending in an oblique direction from one of the edges (2) towards the center (3) of said tread (1), the plurality of tread bars (10) comprising at least two adjacent tread bars (11, 12); each of said adjacent tread bars (11, 12) has at least one incision (20, 21, 23) extending along the length of the tread bar, each adjacent tread bar has an overall incision length (LGI) corresponding to the sum of the lengths of the incisions that are part of said tread bar, the widths (LB11, LB12) of said adjacent tread bars (11, 12) are different, and the overall incision length (LGI) in said adjacent tread bars (11, 12) is different.

A tire includes a middle land portion between a crown main groove and a shoulder main groove. The middle land portion is provided with a first middle lug groove extending axially outwardly from the crown main groove, a second middle lug groove extending axially inwardly from the shoulder main grooves wherein the first and second middle lug grooves are arranged alternately in a tire circumferential direction, and a first middle sipe provided between the first and second middle lug grooves. The first middle sipe includes a crown-side middle sipe element extending axially outwardly from the crown main groove, a shoulder-side middle sipe element extending axially inwardly from the shoulder main groove at a location different from an extension line of the crown-side middle sipe element and a connecting middle sipe element connecting therebetween.

A pneumatic tire comprises a tread portion; four main grooves extending in a tire circumferential direction in a tread surface of the tread portion, each having a wave-like shape with periodic oscillation; a center land portion, middle land portions adjacent to the center land portion on either side in a tire lateral direction, and shoulder land portions outwardly adjacent to the middle land portions in the tire lateral direction formed by the main grooves; a plurality of lug grooves that intersect the tire circumferential direction disposed in a row in the tire circumferential direction in the land portions, the plurality of lug grooves each being disposed on a smooth, continuous curved line that crosses the land portions between the outer ends of the tread portion in the tire lateral direction.

A pneumatic tire 1 is provided in a tread portion 2 with a circumferential land region 6 provided with transverse sipes 15 extending across the entire width of the circumferential land region. Each of the transverse sipes 15 comprises an arc-shaped first portion 18 convexed toward one side in the tire circumferential direction and an arc-shaped second portion 19 convexed toward the other side in the tire circumferential direction and connected with the first portion 18 so as to have a wavy configuration. The transverse sipes 15 include a first transverse sipe 16 of which first portion 18 is deeper than the second portion 19 thereof, and a second transverse sipe 17 of which second portion 19 is deeper than the first portion 18 thereof.

Tire with radial carcass reinforcement having a tread of thickness E, this tread having a tread surface and at least one cut opening onto the tread surface to form edge corners. The cut extends into the tread over a total depth H. The cut is in the form of a sipe having a width D. There is also formed, in the vicinity, i.e. at a minimum distance from the said edge corner that is at most equal to five times the width D of the cut, of at least one edge corner of this cut and on the tread surface, at least one cavity having a depth h that is small in comparison with the depth of the cut, i.e. that is at most equal to 30% of the depth H. The at least one cavity reduces the compression rigidity of the tread in the vicinity of the the at least one edge corner.

A tire has a first block that is partitioned by a first pair of major grooves, the first block land making up a first block column arranged along a tire circumferential direction. The first block land has a first closed sipe and a first open sipe. The first closed sipe appears wavelike as seen in plan view, extends in a tire width direction, and has two ends that respectively terminate within the first block. The first open sipe appears wavelike as seen in plan view and has two ends that respectively open into the first pair of major grooves central location in the tire circumferential direction of the first block land. An amplitude of the first open sipe is greater than amplitude of the first closed sipe. A wavelength of the first open sipe is less than wavelength of the first closed sipe.