In a pneumatic tire, one end of a first lug groove opens to an edge of an inner second land on the ground contact edge side, and at the other end terminates within the inner second land. One end of the second lug groove opens to the edge of the inner second land on a equatorial plane edge side, and the other end terminates within the inner second land. The first and second lug grooves are alternately arranged in the circumferential direction. In a region on the outer side in the width direction, a circumferential main groove on the equatorial plane side defining the outer second land has a bent shape with an amplitude in a lateral direction, and includes an acute angle bend bending at an edge on the equatorial plane side. The outside second land includes a lug groove opening to a position facing the bend.

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 has a tread portion. The tread portion has a land region divided by a first edge and a second edge extending in a tyre circumferential direction. The land region is provided with a plurality of sipes each extending between the first edge and the second edge. The plurality of the sipes includes inclined sipes and bent sipes. Each of the bent sipes includes first inclined elements inclined in the first direction with respect to the tyre axial direction and a second inclined element inclined in a direction opposite to the first inclined elements with respect to the tyre axial direction. Each of the inclined sipes is configured to have a depth larger at a center portion thereof than at both end portions thereof. Each of the bent sipes is configured to have a depth smaller at a center portion thereof than at both end portions thereof.

In the pneumatic tire, at least one main groove is formed in each tread portion on either side of the tire equator to form plural land portions, a microgroove that extends in the width direction and closes at a time of grounding, and a crossing microgroove that crosses the microgroove and closes at the time of grounding are formed in at least one of the land portions, such that block groups, each consisting of plural blocks aligned along the microgroove, are arranged in at least one of the land portions repeatedly in the circumferential direction, and widthwise sidewalls of blocks in a block group arranged adjacent to each other in the circumferential direction are displaced from each other along the microgroove by a distance L corresponding to from 1/3 to 1/2 of the arrangement pitch P of the blocks.

A pneumatic tire including a block that is partitioned by plural circumferential direction grooves extending along a tire circumferential direction and by plural lug grooves extending diagonally with respect to the tire circumferential direction and provided with two or more bend portions, and at least one inclined fine groove that extends diagonally with respect to the tire circumferential direction, that is provided with at least two bend or more portions inside a single block, and that divides the block.

A tire includes a tread portion provided with a plurality of circumferentially and continuously extending main grooves including an outboard shoulder main groove, an outboard middle main groove, an inboard main groove and an inboard middle groove to define an outboard middle portion, an inboard middle portion and a central portion. The outboard middle portion is provided with a plurality of outboard middle lateral grooves, a plurality of outboard middle circumferential sipes each extending between adjacent outboard middle lateral grooves, and a plurality of outboard middle lateral sipes. The inboard middle portion is provided with a plurality of inboard middle lateral grooves, a plurality of inboard middle circumferential sipes, and a plurality of inboard middle lateral sipes. The number of inboard middle lateral sipes is greater than the number of the outboard middle lateral sipes.

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.

A tire includes a tire tread having a plurality of tread elements positioned thereon, and a plurality of grooves provided therebetween. A first set of sipes extend from a circumferential axis of the tire tread towards a first axial end of the tire tread at a non-zero angle with respect to an axial axis of the tire tread. A second set of sipes extend from the circumferential axis towards a second axial end of the tire tread opposite the first axial end at the non-zero angle such that a first sipe end of each of the first set of sipes may be positioned proximate to a second sipe end of each of the second set of sipes. Each of the first and second set of sipes extend beyond 50% of a half width of the tire, and have a sipe depth greater than 50% of a height of the plurality of tread elements.

A tread (12) for a heavy truck tire is provided that has a bottom surface (14), a shoulder rib (16), and a sacrificial rib (20) located outboard from the shoulder rib (16) in a width direction. A decoupling void (30) is located between the shoulder rib (16) and the sacrificial rib (20). A decoupling void sipe (32) is in the shoulder rib (16) and opens at the shoulder rib upper surface (18) and at the decoupling void (30). The decoupling void sipe (32) extends in the thickness direction and is closer to the bottom surface (14) than the decoupling void (30) in the thickness direction.

A pneumatic tire comprises a tread portion provided with blocks divided by main grooves extending continuously in the tire circumferential direction, and axial grooves connecting between the main grooves. The blocks include a siped block. The siped block is provided with a first sipe extending in the tire axial direction across the block, and second sipes respectively disposed in regions subdivided by the first sipe. Each of the second sipes is a closed sipe whose both ends are closed, and the maximum depth of the second sipe is less than the maximum depth of the first sipe.