Abstract: A heavy duty pneumatic tire includes a tread portion provided with a plurality of circumferentially extending main grooves and a plurality of land portions separated by the main grooves. The land portions include a shoulder land portion with a tread edge, a first middle land portion adjacent to the shoulder land portion, and a second middle land portion adjacent to the first middle land portion. The shoulder land portion is formed into a circumferentially continuous rib. The first middle land portion is formed into a row of first middle blocks separated by a plurality of first middle lateral grooves. The second middle land portion is formed into a row of second middle blocks separated by a plurality of second middle lateral grooves. Each first middle block has a circumferential length greater than that of each second middle block.

Abstract: A pneumatic tire is disclosed having two annular bead portions having a bead core. A carcass extends between the bead portions through sidewall portions and a tread portion, wherein the carcass includes at least two axially inner plies which extend down from the tread and axially inward of the bead core, said at least two axially inner plies being wound around the bead core forming respective turn-ups, each turnup being located axially outward of the bead core. The carcass further includes a first axially outer ply which extends down from the tread towards the bead core and positioned axially outward of the bead core, wherein at least one of the axially outer plies is formed from reinforcements having a higher break strength than the reinforcements of the axially inner plies.

Abstract: A tread pattern is provided with: shoulder lug grooves open at ground contact ends; center lug grooves each having opposite ends; circumferential primary grooves each formed in a wavy shape by connecting ends of the center lug grooves and the inner ends of the shoulder lug grooves in the width direction of the tire; and center blocks defined by the center lug grooves and the pair of circumferential primary grooves. The width of the circumferential primary grooves is smaller than the width of the shoulder lug grooves. The center lug grooves are tilted relative to both the circumferential direction and the width direction of the tire and each have a third groove turning portion and a fourth groove turning portion which protrude in the different directions in the circumferential direction of the tire.

Abstract: A tread pattern of a pneumatic tire comprises shoulder lug grooves that open to ground contact edges; center lug grooves; a pair of circumferential primary grooves with a narrower groove width than the shoulder lug grooves, wherein a portion that bends outward in the tire width direction connects to the shoulder lug grooves and a portion that bends inward in the tire width direction connects to the center lug grooves; and center blocks defined by the center lug grooves and the circumferential primary grooves. The circumferential primary grooves are on opposite sides in the tire width direction in regions spaced from a center line by a distance of from 30% to 60% of half of a tread width T. The ratio of the groove width P3 of the center lug grooves to the maximum length LB in the tire circumferential direction of the center blocks is from 0.03 to 0.07.

Abstract: A self-sealing tire for vehicle wheels includes: a carcass structure, a tread band applied in a radially external position to the carcass structure at least in a crown area of the tire, a liner applied in a radially inner position to the carcass structure, and a layer of sealing material applied in a radially inner position to the carcass structure and which extends axially at least in all the crown area of the tire in which the sealing material includes a partially chemically crosslinked composition including an unsaturated styrene thermoplastic elastomer.

Abstract: The purpose of the present invention is to provide a motorcycle tire for uneven ground travel for which the sticking of dirt to block grooves can be effectively prevented. Provided is a motorcycle tire for uneven ground travel in which a tread portion has a block pattern in which a plurality of blocks are provided. The blocks include, at the tread surface, at least one grooved block which has a block groove which is substantially C-shaped in plan view. The block groove has a pair of first groove portions that mutually extend in the same direction from the edge of the tread surface, and a second groove portion that links the first groove portions. The groove width W2 of the second groove portion is larger than the groove width W1 of the first groove portions, or the groove depth d2 of the second groove portion is larger than the groove depth d1 of the first groove portions.

Abstract: Blocks are formed on a tread surface of a pneumatic tire by main grooves extending in the tire circumferential direction and lateral grooves which intersect with the main grooves. The blocks include: center blocks which are positioned in a center region in the tire width direction; shoulder blocks which are positioned on both side regions in the tire width direction; and mediate blocks which are positioned in an intermediate region between the center blocks and the shoulder blocks. The lateral groove formed between the shoulder blocks and the lateral groove formed between the mediate blocks which are positionally displaced from each other in the tire circumferential direction are connected to each other via the main groove by an auxiliary block.

Abstract: A motorcycle pneumatic tire for travelling over rough terrain, wherein: the tire has a plurality of fin-like projections provided in the tire circumferential direction with intervals therebetween in an outer surface of the sidewall portion such that the fin-like projections each protrude from the outer surface and extend in the tire radial direction; a surface of at least the end portion on the outer side in the tire radial direction of each fin-like projection is formed to have an arcuate configuration protruding toward the tire inner surface side in a cross section in the width direction of the tire; and the arcuate surface of the end portion on the outer side in the tire radial direction of the fin-like projection is smoothly connected to an outer side surface of a shoulder block provided on the outermost side in the tire width direction of the tread portion.

Abstract: A cavity noise reduction tire comprises a tread portion, a bead assembly being disposed at each side of the tread portion, and a sidewall portion for connecting the tread portion and the bead assembly. The tire has a ratio of the cross-sectional area of the sound-absorbing material to the cross-sectional area of the space formed by the internal surface of the tire which is to be about 23-29%.

Abstract: A sipe is formed in a land portion of a tread surface. The sipe has a 3D sipe portion formed into a three-dimensional shape which changes along a depth direction, and a 2D sipe portion formed into a two-dimensional shape which does not change along the depth direction. The 3D sipe portion extends in the depth direction from the tread surface and terminates at a position which does not reach a sipe bottom. The 2D sipe portion extends in the depth direction from a terminated position of the 3D sipe portion and reaches the sipe bottom. The three-dimensional shape of the 3D sipe portion is formed into a sideways V-shaped form which is bent at one position in the depth direction. Both ends of the sipe are closed within the land portion.

Abstract: A pneumatic tire includes at least three circumferential grooves extending in the tire circumferential direction in the tread portion, and at least four ribs extending in the tire circumferential direction. In the pneumatic tire, at least two of the ribs including a rib disposed on a first side of the tire equatorial plane in the tire width direction and a rib disposed on a second side protrude to the outer side in the tire radial direction beyond a profile line of a tread surface when viewed in a meridian cross section. The protruding amount decreases in order from the first side to the second side in the tire width direction, and the loss tangent tan ? at 60° C. of the compound in a region where the rib has the least protruding amount is smaller than that in a region of the rib where the protruding amount is the greatest.

Abstract: An object is to improve noise performance of a tire while enhancing movement performance thereof. At least one of the land portions (20) includes an outer wall surface (30) positioned on a vehicle outer side, an inner wall surface (31) positioned on a vehicle inner side, a tread surface (32) on an outer side in a tire radial direction, an outer edge (33) of the tread surface (32) in contact with the outer wall surface (30), and an inner edge (34) of the tread surface (32) in contact with the inner wall surface (31). The tread surface (32) is formed in a convex shape which is smoothly curved between the outer edge (33) and the inner edge (34) and which has a top portion (43) most protruded outward in the tire radial direction, in a cross section of the land portion (20) in a tire width direction.

Abstract: There is provided a rubber decor or a tire having: a rubber; a white layer arranged on or above a surface of the rubber and composed of a white paint; and a colored layer composed of a paint except a white paint and at least partially applied on the white layer. The darkest part of the white layer has brightness of 80% or more. The white layer and the colored layer constitute a desired decoration.

Abstract: A pneumatic tire according to the present invention including a tread surface having at least one circumferential groove extending along a tire circumferential direction and a plurality of widthwise grooves opening to the circumferential groove, the widthwise grooves having a groove width wider than a groove width of the circumferential groove at least in a portion opening to the circumferential groove and, the widthwise grooves extending in a direction inclined with respect to the tire circumferential direction, wherein a recess is formed on a groove wall surface of the circumferential groove opposite to the widthwise groove.

Abstract: An objective of the present invention is to provide a pneumatic tire whereby primarily rolling resistance is minimized and noise is minimized. This pneumatic tire tread rubber (5) comprises: a cap part (50) which is formed of non-conductive rubber and configures a grounding surface; a base part (51) which is disposed on the inner side of the cap part (50) in a tire radial direction (RD); and conductive parts (52) which are disposed in both of a pair of lateral end parts which are at ends of the cap (50) in a tire width direction, traverse the inner part of the cap (50) while avoiding a location which covers the grounding surface, and form shapes which connect the grounding surface with the bottom surface (50b) of the cap part (50) in the tire meridian cross-section. The conductive parts (52) are provided with extended sites (52b) which branch off outward to the tire width direction (WD) from conductive paths (52a) which connect the grounding surface with the bottom surface (50b) of the cap part (50).

Abstract: A tire mold is provided with a groove-like saw cut in an area of a tire molding surface which comes into contact with a side surface of a tire. The saw cut comprises a pair of circumferential saw cuts arranged to be spaced in a tire diametrical direction, a grid-like saw cut which is expanded between the pair of circumferential saw cuts, and a plurality of frame-like saw cuts which are dotted between the pair of circumferential saw cuts. The frame-like saw cuts fringe a closed area which is wider than a smooth area defined by the grid-like saw cut. The grid-like saw cut surrounds the frame-like saw cuts to prevent the frame-like saw cuts from coming into contact with each other. The frame-like saw cuts are coupled to each other via the grid-like saw cut.

Abstract: The contact patch of the center land portion partitioned by the center side main grooves protrudes outward in the tire radial direction from the overall standard profile line of the tread portion. The maximum protruding amount is not less than 1.0% and not more than 2.5% of the tire width direction dimension of the center land portion. The contact patch of the intermediate land portion partitioned by the center side main groove and the shoulder side main groove protrudes outward in the tire radial direction from the standard profile line. The maximum protruding amount is not less than 0.7% and not more than 2.0% of the tire width direction dimension of the intermediate land portion. The maximum protruding amount of the center land portion is greater than the maximum protruding amount of the intermediate land portion.

Abstract: Provided are: a tire mold including a bead portion molding surface for molding the bead portion of the tire, the bead portion molding surface having a ridge molding part including a recessed groove extending in the mold radial direction, the ridge molding part being formed in a flange contact portion molding region for molding a rim-flange contact portion of the tire; and a pneumatic tire, in which a bead filler has the tire radial direction outer end positioned more inward in the tire radial direction relative to the rim line position, and a ridge forming portion including a ridge extending in the tire radial direction is formed on the outer surface of the bead portion, the ridge forming portion being positioned in the rim flange contact portion.

Abstract: The pneumatic tire (1) comprises at least three circumferential grooves (22) extending in a tire circumferential direction in a tread portion (2), and at least four ribs (23) defined by the circumferential grooves (22), the at least four ribs (23) extending in the tire circumferential direction. At least two of the ribs (23) protrude outward in a tire radial direction beyond the profile line (L) of the tread surface when viewed in the meridian cross section. The protruding amount (G) of the at least two ribs (23) decreases in order from a first side in a tire width direction to a second side.

Abstract: A pneumatic tire includes a tread portion provided with a pair of central blocks arranged on both sides of a tire equator. Each of the central blocks includes a ground contacting face having an axially inner block edge facing the tire equator. The inner block edge extends in a V-shaped manner including a first inclined edge and a second inclined edge inclined in an opposite direction to the first inclined edge. The second inclined edge has a circumferential length shorter than a circumferential length of the first inclined edge. Each of the central blocks includes a first portion having the first inclined edge and a second portion having the second inclined edge. The second portion of the central block includes an end wall at an opposite side to the first portion. The end wall includes a stepwise wall extending in steps toward a groove bottom.