A tire comprises a tread portion whose position when mounted on a vehicle is specified. The tread portion includes an inner crown land region defined between a crown main groove and an inner shoulder main groove. The inner crown land region includes crown lateral grooves, first inner crown sipes, second inner crown sipes each extending from the inner shoulder main groove toward the crown main groove and having an inner end terminating within the inner crown land region, and third inner crown sipes each extending from the crown main groove toward the inner shoulder main groove and having an outer end terminating within the inner crown land region. The crown lateral grooves each have a length in a tire axial direction larger than that of each of the second inner crown sipes.

To provide a pneumatic tire capable of improving rut running performance. In a pneumatic tire according to an embodiment, a shoulder block provided in a shoulder region of a tread portion is provided with a plurality of sipes which are formed at intervals in a tire circumferential direction to extend in a tire width direction. In the plurality of sipes, a dimple is provided on an outside in the tire width direction in relation to each tire ground contact end in a communication state. The dimple includes a portion formed with a wide width from a connection portion with the sipe toward the outside in the tire width direction and maximum width portions of the plurality of dimples are disposed to be offset in the tire width direction.

A tyre comprises a tread portion comprising a first tread edge and a second tread edge, and the tread portion is provided with a plurality of oblique grooves. The plurality of the oblique grooves includes a first oblique groove and a second oblique groove. Each of the first oblique grooves and the second oblique grooves has an open end and a terminating end, and a first steeply-inclined portion positioned on a side of the open end, a second steeply-inclined portion positioned on a side of the terminating end, and a mildly-inclined portion positioned between them. The second steeply-inclined portion includes a part in which an angle thereof with respect to a tyre circumferential direction is gradually decreased as it goes toward the terminating end.

A pneumatic tire includes two circumferential main grooves disposed in an inner half of a tread developed width in a tire lateral direction; shoulder lug grooves that divide shoulder land portions into shoulder block portions and that each include a see-through portion in the tire lateral direction; and center lug grooves that divide a center land portion into a plurality of center block portions. The center lug grooves each include: two end groove portions opening to the innermost circumferential main grooves and one center groove portion that extends between the end groove portions, has at least a part disposed on a tire equator line, and has an angle θ.sub.1 with respect to the tire equator line satisfying −45°≤θ.sub.1≤+15°.

A tire for which a mounting direction to a vehicle is specified, has a tread portion axially divided into five land portions each provided with sipes. The five land portions are a first shoulder land portion, a first middle land portion, a crown land portion, a second middle land portion, and a second shoulder land portion having ground contacting surface widths W1s, W1m, Wc, W2m and W2s, respectively, which satisfy the following condition: W1s>W1m>Wc>W2m=>W2s under a 50% load state of the tire.

In a pneumatic tire, a center land comprises a plurality of center sipes, all of the center sipes are respectively contiguous with a first end and a second end in a tire axial direction of the center land, a first shoulder land comprises a plurality of first shoulder sipes, and all of the first shoulder sipes are contiguous with an outer end in the tire axial direction of the first shoulder land but are separated from an inner end in the tire axial direction of the first shoulder land.

A heavy truck tire tread is provided that has a rolling direction that is in a longitudinal direction of the tread. A circumferential sipe (20) is present and extends in the longitudinal direction completely around the tread. The circumferential sipe does not bound a sacrificial rib. A plurality of micro sipes (22) engage the circumferential sipe and are located on opposite sides of the circumferential sipe in the lateral direction. The micro sipes extend from the circumferential sipe so as to terminate within rubber of the tread at a terminal end.

A pneumatic tire includes the plurality of sipes, when, with regard to each sipe in which the shoulder-side end portion is located closest to a center side among the plurality of sipes, a position of the shoulder-side end portion of the sipe in the tire width direction is taken as a first reference position, and with regard to each sipe in which the center-side end portion is located closest to a shoulder side among the plurality of sipes, a position of the center-side end portion of the sipe in the tire width direction is taken as a second reference position, the plurality of sipes are arranged at regular intervals in the tire circumferential direction, and at other of the first reference position and the second reference position, the plurality of sipes are arranged at irregular intervals in the tire circumferential direction.

A tread portion includes a crown land portion including first and second longitudinal edges extending in the tire circumferential direction. The crown land portion is provided with first, second and third crown sipes. The first, second and third crown sipes open at the ground contact surface via respective chamfer portions. The first and third crown sipes extend from the first longitudinal edge and have closed ends in the ground contact surface. The second crown sipes extend from the second longitudinal edge and have closed ends in the ground contact surface. Each first crown sipe has a constant opening width in a longitudinal direction of the sipe. Each second crown sipe has a constant opening width in a longitudinal direction of the sipe. Each third crown sipe has an opening width which decreases continuously from the first longitudinal edge toward the closed end thereof.

A tire has an intended tire rotational direction and comprises a tread portion having a tread surface defined between tread edges and a pair of buttress surfaces defined as extending radially inwardly from the respective tread edges. One or each of the buttress surfaces is provided with a plurality of protrusions protruding axially outwardly and arranged in the tire circumferential direction. The protrusions include a curved protrusion which extends radially inwardly from the tread surface while curving toward the intended tire rotational direction.