Abstract: A rubber rib extending in the extension direction of a groove is respectively formed in profile element flanks which delimit the groove and each form a different groove wall. The rubber rib formed in one groove wall is formed in a different radial position than the rubber rib formed in the other groove wall. The two rubber ribs each extend over the entire extension length of the profile element flank and each of these two rubber ribs respectively extends along its entire extension length from that profile element flank in which it is formed into the groove in the direction of the other profile element flank up to at least the middle of the groove width in this radial position of the groove and ends there in the groove at a distance from the profile element flanks.

Abstract: A method for building green tyres includes: feeding an elementary semifinished product with a feeding apparatus; associating an anthropomorphic robotized arm with a forming drum; sending movement commands to the arm to move the forming drum in a working zone, the forming drum being moved while the feeding apparatus is feeding an elementary semifinished product, so that it is laid on the forming drum. Movement commands are sent to the arm, including: determining target coordinates for the arm in order to move the forming drum in the working zone; modifying the target coordinates by a correction function associated with the arm and the working zone, and using the modified coordinates for such movement commands.

Abstract: A pneumatic tire includes circumferential main grooves extending in the tire circumferential direction on the tread surface, and in widthwise outermost land portions, widthwise grooves extending from the tread edges inward in the tire width direction and widthwise sipes extending from the tire widthwise inner edge of the widthwise grooves inward in the tire width direction and connecting to the circumferential main groove. Each widthwise sipe includes a widened portion, by the sipe bottom, with a larger sipe width than at the tread surface. A rectangle ratio is 0.8 or more. Each widthwise sipe extends at a first angle relative to the tire width direction in plan view of the tread surface. In a tire radial region containing the widened portion, the widened portion extends at a second angle smaller than the first angle relative to the tire width direction, or partially extends along the tire width direction.

Abstract: A pneumatic tire includes a tread portion having a first tread edge, and a first buttress portion extending inwardly in a tire radial direction from the first tread edge. The first buttress portion is provided with a plurality of protectors protruding outwardly in a tire axial direction. Each of the plurality of protectors includes a top surface facing outwardly in the tire axial direction, and a side surface extending inwardly in the tire axial direction from an edge of the top surface. The side surface includes an outward-facing portion facing outwardly in the tire radial direction, an inward-facing portion facing inwardly in the tire radial direction, and a circumferential portion facing in a tire circumferential direction. The outward-facing portion, the inward-facing portion and the circumferential portion have different angles with respect to respective normal lines of the top surface from each other.

Abstract: A center land has first center notches, second center notches, center slits, a first land end and a second land end. The first center notches and the center slits open onto the first land end in alternating fashion as one proceeds along a tire circumferential direction. The second center notches and the center slits open onto the second land end in alternating fashion as one proceeds along the tire circumferential direction. A quarter land has first quarter slits, first quarter notches, second quarter slits, second quarter notches, a third land end and a fourth land end. The first quarter slits and the first quarter notches open onto the third land end in alternating fashion as one proceeds along the tire circumferential direction. The second quarter slits and the second quarter notches open onto the fourth land end in alternating fashion as one proceeds along the tire circumferential direction.

Abstract: A pneumatic tire includes a circumferential main groove extending in a tire circumferential direction in a tread surface of a tread portion, wherein when the circumferential main groove is segmented into an outer side in a tire radial direction and an inner side in the tire radial direction by drawing an imaginary segment line parallel with a straight line connecting each of groove opening edges at a position of ½ of a groove depth in a meridian cross-section, a cross-sectional area SU on the outer side in the tire radial direction and a cross-sectional area SD on the inner side in the tire radial direction satisfy the relationship 0.15?SD/SU?0.60.

Abstract: A tire according to the present disclosure is a tire including, in a tread surface, a tread land portion partitioned by a partitioning groove or by the partitioning groove and a tread edge. The tread land portion includes a sipe extending from a surface of the tread land portion inwardly in a tire radial direction. The sipe includes a widened portion with a larger sipe width than a position adjacent in a sipe longitudinal direction. The cross-sectional area of the widened portion in cross section perpendicular to the tire radial direction is larger on inside than on outside in the tire radial direction.

Abstract: A tire has a tread portion bound with an intended tire rotational direction. The tread portion includes a first tread edge and a second tread edge. The tread portion is provided with first oblique grooves extending obliquely toward a heel side in the tire rotational direction from the first tread edge toward a tire equator side, second oblique grooves extending obliquely toward the heel side from the second tread edge toward the tire equator side, and first circumferential grooves each connecting a respective pair of the first oblique grooves adjacent to each other in a tire circumferential direction. The first oblique grooves have the tire equator side end portions intersecting with the second oblique grooves. The second oblique grooves have the tire equator side end portions intersecting with the first oblique grooves. The first circumferential grooves have groove widths each increasing toward the heel side in the tire rotational direction.

Abstract: A circumferential narrow main groove extending in a circumferential direction in a tread of a pneumatic tire. The circumferential narrow main groove includes a narrow portion opening to a road contact surface of the tread and a widened portion having a wider groove width than the narrow portion. The widened portion is at a groove bottom. A groove width ratio (W2/W1) of a maximum groove width W2 of the widened portion to a groove width W1 of the narrow groove portion is in a range 1.5?(W2/W1)?4.0, and a cross-sectional area ratio (A2/A1) of a groove bottom-side cross-sectional area A2 to a groove opening-side cross-sectional area A1 in a meridian cross-section is within a range 1.2?(A2/A1)?4.0 when the circumferential narrow main groove is divided into two parts at 50% of a maximum groove depth of the circumferential narrow main groove. The cross-sectional area ratio changes along the circumferential direction.

Abstract: A tread 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). First decoupling void sipes (32), second decoupling void sipes (100) and third decoupling void sipes (104) are in the shoulder rib (16), and one second decoupling void sipe (100) is between one first decoupling void sipe (32) and one third decoupling void sipe (104). The first and third decoupling void sipes (32, 104) are closer to the bottom surface (14) than is the decoupling void (30) in the thickness direction. The second decoupling void sipe (100) is not closer to the bottom surface (14) than is the decoupling void (30) to the bottom surface (14) in the thickness direction.

Abstract: A pneumatic tire includes circumferential grooves aligned in a lateral direction and extending in a circumferential direction, lateral grooves aligned in the circumferential direction and extending to cross the circumferential direction, communicating at ends with the circumferential grooves and defining a block-shaped land portion between the circumferential grooves, two narrow grooves aligned in the lateral direction and extending in the circumferential direction, communicating at ends with a lateral groove and dividing the land portion defined by each of the circumferential grooves and each of the lateral grooves into small land portions, the narrow grooves having a smaller groove width than the circumferential grooves and being formed with a bent portion in an intermediate portion, the bent portion being disposed inward in the lateral direction, and bend points of the bent portions being disposed at positions offset from one another in the circumferential direction.

Abstract: A non-pneumatic tire includes a rim part in which an insertion groove is formed and being connected with an axle; a tread part formed in a shape of surrounding an outer side of the tire in a circumferential direction thereof and being in contact with the ground; a spoke part formed between the rim part and the tread part and provided with upper arch bodies and lower arch bodies of an arch shape to absorb impacts transmitted from the ground to the tread part; a structural reinforcement part inserted into the inside of the tread part to perform load support and stress distribution of the spoke part; a conductive structure part formed between an outer surface of the rim part and an inner surface of the tread part, and having fiber plated using a metal salt.

Abstract: 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.

Abstract: A tyre having a tread is described. The tyre has a central portion located across an equatorial plane, a first shoulder portion located towards an outer side of the tyre and a second shoulder portion located towards an inner side of the tyre. The central portion is separated from the first shoulder portion by two first circumferential grooves. The first shoulder portion and the second shoulder portion have a plurality of first transverse grooves having a first end located substantially at the respective edge of the tread, having a width greater than or equal to about 4 mm and an axial extension equal to at least 50% of the width of the shoulder portion in which they are located.

Abstract: In a tire, a main groove has a bend where the groove wall angle relative to the tread surface normal line changes in a meridian cross-section. In first and second blocks adjacent in a width direction with the main groove therebetween, an angle between a line extended from a ridge line formed by a bend of a first block side groove wall and a line extended from a lug groove wall defining the first block is larger than an angle between a line extended from the ridge line formed by a bend of the second block side groove wall and a line extended from a lug groove wall defining the second block, and an angle of the first block side groove wall to the tread surface normal line is smaller than an angle of the second block side groove wall to the tread surface normal line.

Abstract: Pneumatic vehicle tire having sidewalls and having at least one hatching area (1) or a hatched area element on at least one sidewall, wherein the hatching area (1) or the area element has a multiplicity of hatching ribs (2, 2?, 2?) running next to one another and having two lateral flanks (3a, 3?a, 3?a, 3b, 3?b, 3?b). The one lateral flank (3a, 3?a, 3?a) of the hatching ribs (2, 2?, 2?) has a surface finish which differs from that on the other lateral flank (3b, 3?b, 3?b) of the hatching ribs (2, 2?, 2?).

Abstract: A pneumatic tire includes a circumferential main groove extending in a tire circumferential direction and a land portion defined by the circumferential main groove. The circumferential main groove includes a groove opening portion and a groove bottom portion each having a zigzag shape or a wave-like shape with an amplitude in a tire width direction. An outer maximum amplitude position of an outer edge portion in the groove opening portion is disposed to be offset in a tire circumferential direction with respect to an outer maximum amplitude position of an outer edge portion of the corresponding groove bottom portion.

Abstract: A tire includes a pair of shoulder main grooves and one or more center main grooves extending in a tire circumferential direction and four or more rows of land portions defined by the pair of shoulder main grooves and the one or more center main grooves. Each of the pair of shoulder main grooves includes a groove opening portion having a wave-like shape with an amplitude in a tire width direction. Each of the pair of shoulder main grooves includes a groove bottom portion having a zigzag shape with an amplitude in the tire width direction. The groove opening portion in each of the pair of shoulder main grooves has an amplitude A1_sh having a relationship A1_sh<A2_sh with respect to an amplitude A2_sh of the groove bottom portion.

Abstract: A tread pattern of a pneumatic tire includes three or more circumferential main grooves extending in a tire circumferential direction, a plurality of lug grooves provided in a land portion defined by two circumferential main grooves, and a sipe provided between adjacent lug grooves. The sipe is a composite sipe having a two-dimensional portion and a three-dimensional portion. Among open ends on both sides of the lug groove, an open end on an identical side to an end portion of the sipe at which the two-dimensional portion is provided is provided with a raised bottom portion.

Abstract: A utility vehicle tire having a tread with at least two circumferential channels (3), which are formed to a profile depth (T) and which separate central profile positives (1) and shoulder-side profile positives (2) from one another, the circumferential channels (3) having channel flanks (5a, 5b) toward the central profile positives (1) and the shoulder-side profile positives (2) having shoulder flanks (6) running toward the side wall. The channels have depressions delimited by a curved surface.