A tire tread includes a pair of first circumferential main grooves in a first half-tread region on one side in a tire width direction, a pair of second circumferential main grooves in a second half-tread region, first sipes provided in a first region between the first circumferential main grooves, a circumferential narrow groove having a groove width smaller than a groove width of the first circumferential main groove and extending in the tire circumferential direction within the first region, and sipes in a second region between the second circumferential main grooves, extending in the tire width direction, and closing within the second region. The number of intervals of the second sipes mutually adjacent is larger than the number of intervals of the first sipes mutually adjacent.

A walking mechanism for driving a machine body includes a walking wheel group having a plurality of walking wheels attached to the machine body, with two front and two rear wheels relative to a traveling direction. The machine body has two sides with a pair of one of the front wheels and a one of the rear wheels being respectively located on each of the sides and driven to rotate synchronously. Each walking wheel includes an auto tire casing with a tread outer side having a tread pattern distributed along a circumferential direction of the auto tire casing. The tread pattern is configured as a plurality of tread ribs with a respective tread groove formed between each adjacent pair of the tread ribs, the tread pattern radiating outward from an axial center of the walking wheel. A related robot and self-walking mower are also disclosed.

A walking mechanism for driving a machine body includes a walking wheel group having a plurality of walking wheels attached to the machine body, with two front and two rear wheels relative to a traveling direction. The machine body has two sides with a pair of one of the front wheels and a one of the rear wheels being respectively located on each of the sides and driven to rotate synchronously. Each walking wheel includes an auto tire casing with a tread outer side having a tread pattern distributed along a circumferential direction of the auto tire casing. The tread pattern is configured as a plurality of tread ribs with a respective tread groove formed between each adjacent pair of the tread ribs, the tread pattern radiating outward from an axial center of the walking wheel. A related robot and self-walking mower are also disclosed.

Provided is a pneumatic tire. At least three blocks of a plurality of blocks formed on a tread portion, which include an outermost block positioned on an outermost side in a tire lateral direction and are adjacent to each other in the tire lateral direction, and at least two longitudinal grooves positioned between the at least three blocks are arranged on a platform, which is raised from a groove bottom of a lateral groove, has a flat top surface, and has a shape protruding toward both sides in a tire circumferential direction with respect to the at least three blocks. On a groove bottom of a longitudinal groove adjacent to the outermost block, a raised bottom portion raised from the groove bottom of the longitudinal groove is provided. The raised bottom portion connects the outermost block and the block adjacent to the outermost block.

Provided is a pneumatic tire. At least three blocks of a plurality of blocks formed on a tread portion, which include an outermost block positioned on an outermost side in a tire lateral direction and are adjacent to each other in the tire lateral direction, and at least two longitudinal grooves positioned between the at least three blocks are arranged on a platform, which is raised from a groove bottom of a lateral groove, has a flat top surface, and has a shape protruding toward both sides in a tire circumferential direction with respect to the at least three blocks. On a groove bottom of a longitudinal groove adjacent to the outermost block, a raised bottom portion raised from the groove bottom of the longitudinal groove is provided. The raised bottom portion connects the outermost block and the block adjacent to the outermost block.

A tyre comprises a tread portion comprising a shoulder main groove and a shoulder land region. The shoulder land region includes an outer region, a middle region, and an inner region. The shoulder land region is provided with a plurality of shoulder sipes having components in a tyre axial direction. A sipe ratio of the middle region is smaller than the sipe ratio of the outer region and the sipe ratio of the inner region.

An airless flexible tire including traction lug pairs each having a forward facing traction lug and a rearward facing traction lug cooperatively forming a divided Z or reverse divided Z shape. Each traction lug includes a lateral section and a central section. The central section extends from an end of the lateral section so as to straddle a centerline of the airless flexible tire and includes a number of discrete sidewalls. The discrete sidewalls are different sizes and angled relative to each other. The central sections of paired traction lugs form a space dividing portions of the Z or reverse Z shape. The central sections of nearest traction lugs of adjacent traction lug pairs form a space dividing the adjacent traction lug pairs.

A tire comprises a tread portion axially divided into four land regions. The tire has a mounting direction to a vehicle and the land regions 4 include a widest outboard middle land region. The outboard middle land region is provided with first, second and third inclined grooves. The first inclined groove extends from a crown main groove and terminates within the outboard middle land region. The second inclined groove has its both ends terminated within the outboard middle land region. The third inclined groove intersects the first and second inclined grooves.

Method for controlling the symmetry of the footprint area of a tyre miming on a straight trajectory with camber angle different from zero, wherein the method comprises the steps: —reducing the contact pressure of the tyre (2) on the footprint area at an inner shoulder (in case of negative camber) or at an outer shoulder (in case of positive camber); —disposing any medium line (Im) of the tread band (9) placed in correspondence with the footprint area substantially parallel to the ground; the invention also defines a tyre and a wheel for motor-vehicles, wherein the medium line (Im) of the tread hand (9) and the rotation axis (X-X) of the tyre (2) form an angle (a) substantially equal in absolute value to the camber angle (β); the invention also encompasses a process for manufacturing such tyres, wherein a green tyre with symmetric outer profile is deformed during the vulcanising and moulding step until a predetermined angle (a) different from zero is formed between any medium line (Im) of the tread band (9) and the rotation axis (X-X) of the vulcanised tyre (2).

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.