Abstract: A tire having aggressive tread features with improvements in uniformity that can also improve endurance is provided along with a method and apparatus for manufacturing such a tire. The tire and its manner of manufacture can achieve a reduction or elimination of certain non-uniformities that can occur during the molding of large tread blocks. The reduction or removal of these non-uniformities can improve temperature performance to provide increased tire endurance.

Abstract: An off the road tire comprising a carcass, a tread located radially outward of the carcass, the tread having a plurality of lugs, the lugs extending radially outward from an inner tread and being located between first and second lateral tread edges, a first row of lugs extending from the tread lateral edge axially inwards toward the centerplane, a second row of lugs extending from the opposite tread lateral edge and axially inwards toward the centerplane and wherein the lugs of the first and second rows are separated by a plurality of shoulder grooves, a third row of lugs located between the first and second row of lugs, wherein all of the lugs in each row are aligned circumferentially, wherein the lugs in the third row have two or more ends formed by nonlinear grooves.

Abstract: Each of belt layers of a pneumatic radial tire includes a plurality of single steel wires with an identical wire diameter extending linearly in an identical direction in alignment with each other and embedded in rubber. Each of the wires is provided with axial torsion. On the outer surface of a tread portion, circumferential grooves extend in the circumferential direction of the tire. The wire diameters of the single steel wires are 0.28 mm to 0.38 mm. An average of intervals of the single steel wires is not less than 0.10 mm. The tire has an out-of-plane bending stiffness of not less than 6000N·mm2 per inch of length of the tread portion in the circumferential direction when a force application point is located at the circumferential groove. The implanted density E (wires/50 mm) of the single steel wires satisfies E?1869×d2?1838×d+493, where d is the wire diameter.

Abstract: A tyre includes a tread, a crown with a crown reinforcement, first and second sidewalls, two beads, and a carcass reinforcement anchored to the two beads and extending from the first sidewall to the second sidewall. The tread includes a thermoplastic elastomer that is a block copolymer, which includes at least one elastomer block and at least one thermoplastic block. A total content of the thermoplastic elastomer in the tread is within a range varying from 65 to 100 phr (parts by weight per hundred parts of elastomer).

Abstract: The present invention relates to a rubber composition comprising at least one rubber component, between about 50 phr and about 120 phr of a filler, wherein at least 20 phr of the filler is a high surface area carbon black. Further, the composition comprises between 10 phr and 30 phr of a phenolic resin. The present invention is further directed to a tire tread or a tire comprising such a composition.

Abstract: A non-pneumatic tire includes an inner circumferential barrier configured to be coupled to a hub, an outer circumferential barrier radially spaced from the inner circumferential barrier, and a tread portion associated with the outer circumferential barrier. The tire further includes a support structure coupling the inner circumferential barrier to the outer circumferential barrier. The support structure includes a plurality of ribs extending between the inner circumferential barrier and the outer circumferential barrier, wherein the ribs have a cross-section substantially perpendicular to an axial direction of the tire, with the cross-section having a curvilinear shape.

Abstract: The invention provides a cured tread and a tire capable of controlling irregular wear of the tread. A base tire which is to be the base for the tire and a cured tread which is to be bonded to the base tire are molded separately, and they are integrated with each other to produce the tire. The tread is provided in its width (axial) direction with a plurality of grooves extending in its length (circumferential) direction. The thickness of the tread in a width cross section gradually decreases from the equator to the equator-side edge of the outermost groove located at an axially outermost position and gradually increases from the outer edge of the outermost groove outward in the axial direction.

Abstract: A pneumatic tire having a tire tread is disclosed, wherein the tread comprises one or more tread elements and one or more grooves, the tread having a radially outer surface and a non-skid tread depth as measured from the radially outer surface of the tread and a radially innermost surface of the grooves. The tread has a radially innermost layer comprised of a base tread compound, a radially outer tread cap layer and a middle tread caplayer located between the base layer and the outer tread cap layer. Wherein the radially outer tread cap layer has a defined depth D, except that there is at least one notched areas wherein the tread cap layer extends radially inward of the defined depth D.

Abstract: Provided is a pneumatic tire capable of improving fuel efficiency, handling stability, and durability in a balanced manner. The present invention relates to a pneumatic tire, comprising a tread that includes a cap layer and a base layer, the cap layer and the base layer satisfying relationships represented by the following formulas (1) to (3): 50/50?Vc/Vb?90/10??(1) wherein Vc is the volume of the cap layer and Vb is the volume of the base layer, 0.65?E*c/E*b<1.00??(2), and 1.30?(tan ?c/E*c)/(tan ?b/E*b)<2.40??(3) wherein E*c and tan ?c are the complex modulus and the loss tangent, respectively, of the cap layer at 30° C., and E*b and tan ?b are the complex modulus and the loss tangent, respectively, of the base layer at 30° C.

Abstract: A pneumatic tire exhibiting high traction performance. A center circumferential groove (14) is provided on the equator (CL) of the tread (12), and between shoulder circumferential grooves (18) on both sides of the center circumferential groove (14) are arranged first lateral grooves (20) formed at a smaller angle relative to the axial direction of the tire than the first lateral groove (20). One end of each first lateral groove (20) and one end of each second lateral groove (22) are made to merge at a shoulder circumferential groove (18), and shoulder lateral grooves (23) are arranged on the outer side of each shoulder circumferential groove (18). Each shoulder lateral groove (23) extends from the merging portion toward a tread end (12E) and is formed at a smaller angle relative to the axial direction of the tire than that of the first lateral groove (20). Because the angle of the shoulder lateral grooves (23) relative to the axial direction of the tire is less, traction performance of the tire increases.

Abstract: An object is to enhance traction performance on snowy road surfaces whilst suppressing a drop in braking performance and handling stability performance on dry road surfaces and icy road surfaces. A tread (12) includes first auxiliary grooves (21) formed on one groove width direction side of lug grooves (18, the first auxiliary grooves (21) opening onto the lug grooves (18) and terminating inside central land portion rows (16) (land portions), and second auxiliary grooves (22) formed on the other groove width direction side of the lug grooves (18), the second auxiliary grooves (22) opening onto the lug grooves (18) so as to face opening portions (21A) of the first auxiliary grooves (21) that open onto the lug grooves (18), and terminating inside the central land portion rows (16) (land portions).

Abstract: A pneumatic tire for rough terrain comprises a tread portion provided with a plurality of blocks, the blocks comprising a plurality of center blocks arranged in a center region of the tread portion, a plurality of shoulder blocks arranged along each tread edge of the tread portion and a plurality of middle blocks arranged between the center region and the shoulder blocks, each of the center blocks, middle blocks and shoulder blocks comprising a top face and a sidewall face extending radially inward from the peripheral edge of the top face, wherein at least one of the middle blocks and shoulder blocks is a U-shaped block having a lateral slot which extends from an axially outer sidewall face of the block to an axially inner end thereof being terminated within the block.

Abstract: The invention relates to a rubber composition that is free of zinc or that contains less than 0.5 phr of zinc, which can be used for the manufacture of tyres, based on at least: one diene elastomer; one sulphur-based crosslinking system; one inorganic filler as reinforcing filler; one blocked mercaptosilane of general formula I below: (HO)3-nR1n—Si—Z—S—C(?O)-A in which: R1, which are identical or different, each represent a monovalent hydrocarbon-based group chosen from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms; A represents hydrogen or a monovalent hydrocarbon-based group chosen from alkyls, which are linear or branched, cycloalkyls or aryls, having from 1 to 18 carbon atoms; Z represents a divalent bonding group comprising from 1 to 18 carbon atoms; n is an integer equal to 0, 1 or 2.

Abstract: A tread rubber of a pneumatic tire is formed by a ribbon rubber which is spirally wound around a tire rotating axis. The ribbon rubber is wound toward one side in a tire width direction from a start point which is positioned closer to a center side than tread ends in a tire meridian cross section, is next folded back to the other side in the tire width direction at the tread end on the one side, is wound toward the tread end on the other side beyond the start point, is next folded back to the one side in the tire width direction at the tread end on the other side, and is wound toward an end point. The ribbon rubber has the winding start end and the winding terminal end at tread end vicinity portions avoiding the tread ends and a tread center portion.

Abstract: The present invention provides a pneumatic tire 1, comprising: a carcass ply including a main body portion 11a extending across respective bead cores 9 and turn-up portions 11b each turned up around the bead cores 9 from the main body portion 11a; a bead filler 13; and a side rubber 5a, wherein: a tip portion on the outer side in the tire radial direction of the outer end 13a of the bead filler 13, of each of the turned-up portions 11b, extends to a position of at least 5 mm distance from the outer end 13a of the bead filler with maintaining distance of 1 mm or less between the main body portion 11a and itself; a turn-up end 11c is disposed on the inner side in the tire widthwise direction than a neutral axis of bending of a bead portion 7 and a corresponding sidewall portion 5 and at 10%-40% height of a tire cross sectional height SH of the tire; and the side rubber 5a, disposed on the outer side in the tire widthwise direction of the main body portion 11a and each turn-up portion 11b, covers the turn-up end

Abstract: It is an object to ensure the strength of a carcass line, enhance durability with respect to high applied loads, and be able to suppress the input of compressive force with respect to a carcass ply without increasing mass and cost. When W denotes a distance from a tire equatorial plane (CL) to a tire axial direction outermost point (P) of a carcass body portion (22C) and D denotes a tire radial direction height from bead base portions (30) to a carcass body portion (22A) at the tire equatorial plane (CL), a radius of curvature (R1) of a carcass ply (12) in a range from the tire equatorial plane (CL) to a position (P1) located 0.6 W away from the tire equatorial plane (CL) in the tire axial direction, a radius of curvature (R2) of a carcass body portion (22B) in a range from the position (P1) to a position (P2) located 0.

Abstract: The present invention provides a pneumatic radial tire of the present invention is characterized in that: in a cross sectional view in the tire widthwise direction in the predetermined state thereof, provided that: i) Hout represents a distance in the tire radial direction between the maximum width position from the tire equatorial plane and a ground-contact end on the vehicle outer side of the tread and Hin represents a distance in the tire radial direction between the maximum width position from the tire equatorial plane and a ground-contact end on the vehicle inner side of the tread, Hout<Hin; ii) radius of curvature (Rout)of a tire side portion on the vehicle outer side, at the maximum width position thereof, is smaller than radius of curvature (Rin) of a tire side portion on the vehicle inner side, at the maximum width position thereof; and iii) a negative ratio of a ground-contact surface in a vehicle-outer side half portion of the tread is smaller than a negative ratio of a ground-contact surface in

Abstract: Embodiments of the invention are used to provide ways of tire tread molding and retreading with a double tread rubber body having a unitary structure that comprises two treads in order to remove the need for buffing an oxide layer typically associated with tread molding and curing. Embodiments of the double tread molding and retreading methods also remove the need for cementing the cured tread to prevent future oxidation buildup. Once the double tread is cured and cooled, it is cut along the centerline with a double tread separation apparatus to expose a soft non-oxidized inner rubber. The cutting is much less energy intensive when compared to buffing with an expendable wire brush. There is no risk of spots of oxidized rubber being missed as is the case with buffing. There is little or no dust created.

Abstract: Pneumatic rubber tire with a component comprised of a silica reinforced rubber composition comprised of specialized polybutadiene rubber, functionalized styrene/butadiene elastomer and cis 1,4-polyisoprene rubber.

Abstract: Embodiments are directed to a pneumatic off-road tire having an inner shoulder, an outer shoulder and a tread therebetween. The tread has a central axis and includes a plurality of generally curved first grooves. Each first groove has a first end disposed near the outer shoulder and a second end disposed near the inner shoulder so that each first groove crosses the central axis. The first end is spaced circumferentially from the second end. A plurality of second grooves, each connecting the second end of a first groove to a first end of another first groove, are included. The first and second grooves define a cascading repetition of tread blocks. Chamfers are defined on certain corners of the tread blocks that are adjacent to the first grooves and that expose a tread block wall following the chamfer, relative to a rotation of the tire, to an off-road contact surface.

Abstract: Provided is a pneumatic tire including: a belt reinforcing layer (12) having an outside end portion in the tire width direction disposed outside in the tire width direction than a tire circumferential groove (16) disposed at the outermost side in the tire width direction, in which a buttress portion (19) being positioned on the outside of a tread (15) in the tire width direction and connecting a surface (15a) of the tread (15) to a sidewall (20) is formed to have, in section in the tire width direction, an outer surface in a concave shape with a depth shallow enough not to be set into the inside in the tire width direction from the outside end of the surface (15a) of the tread (15) in the tire width direction.

Abstract: A vulcanizing mould for moulding and vulcanizing a tire, comprising a moulding surface extending circumferentially in the mould, and comprising two end strips of patterns arranged respectively close to two edges of the moulding surface and at least one intermediate strip of patterns positioned between the two end strips of patterns. At least one end strip comprises patterns belonging to a first pattern type and the patterns of the first pattern type have a width which is less than the width of the patterns belonging to the other pattern types of the end strip, and the patterns of the first pattern type are grouped at least in twos on first segments of the mould. The patterns of the end strip not belonging to the first pattern type belong to second segments, each second segment comprising just one pattern of the said end strip.

Abstract: A tire exhibiting a desired design performance can be manufactured at a low cost using a precured tread having a mounting surface formed flat. In the process of manufacture, a base tire formed with a tread mounting surface having curvatures in the axial and circumferential directions of the tire and a precured tread having amounting surface formed flat, which is to be applied to the tread mounting surface of the base tire, are used. The precured tread has grooves (9) in its tread pattern surface opposite from its mounting surface. And the circumferential and axial lengths of the grooves (9) are formed shorter than desired design values, based on the differences in the circumferential and axial lengths between when the mounting surface of the tread applied to the base tire is curved along the curvatures of the tread mounting surface of the base tire and when the mounting surface of the tread is in a flat state.

Abstract: A wheel assembly is disclosed, the wheel assembly including a rigid wheel including a radially outer rim wall presenting a polygonal shape with a plurality of outermost vertices connecting a plurality of planar faces, and a flexible tire mounted on the outer rim wall. The tire is supported by the vertices of the rim wall and is separated from the rim faces by a space, portions of the tire located between the vertices being configured to flex inwardly when subject to ground engaging pressure.

Abstract: A wheel assembly includes a rigid wheel with a plurality of circumferentially spaced radially outermost mounting elements and a flexible tire mounted on the wheel. The tire engages the mounting elements such that portions of the tire not engaging the mounting elements are separated radially from the wheel by a space, the portions of the tire not engaging the mounting elements being configured to flex inwardly toward the wheel when subject to ground engaging pressure.

Abstract: A rubber composition for a studless tire capable of improving the performance on snow and ice, wet performance, abrasion resistance in good balance, and a studless tire having a tread produced from the rubber composition is disclosed. The rubber composition for a studless tire includes a rubber component including modified natural rubber and butadiene rubber; aromatic oil; silica; and carbon black, wherein the amount of the aromatic oil is 15 to 80 parts by mass and the amount of the silica is 15 to 80 parts by mass, relative to 100 parts by mass of the rubber component.

Abstract: The invention includes a retread tire and methods and apparatus for its manufacture, the retread tire including: a tire carcass having a bonding surface arranged along a base layer, the base layer being positioned between the bonding surface and a belt reinforcement package and including at least one base groove open to the bonding surface and a thickness that is variable and asymmetrical; a bonding layer having a thickness that is variable and asymmetrical; and a precured tread band bonded to the tire carcass, the precured tread band comprising a back face bonded to the bonding layer, a front face forming a ground-engaging surface and at least one tread groove extending through at least a portion of the tread band thickness and the back face having a discontinuity associated with the at least one tread groove, which is aligned with one of the at least one base groove.

Abstract: Embodiments include methods for retreading a tire, which include providing a tire carcass for retreading, the tire carcass having a pre-existing tread layer including one or more voids extending into the tread layer thickness from an outer side. A bonding layer is applied along an outer side of the pre-existing tread layer, the bonding layer substantially filling the voids arranged along the outer side of the pre-existing tread layer to provide an outer surface for receiving the pre-cured bonding layer. A pre-cured tread layer is applied along an outer side of the bonding layer such that the bonding layer is arranged between the pre-cured tread layer and the pre-existing tread layer. The pre-cured tread layer is bonded to the tire carcass to form a retreaded tire having are treaded tire tread. Grooves are then formed in the retreaded tire tread along a ground-engaging, outer side of the retreaded tire tread.

Abstract: A set of pneumatic tires that are mounted on a vehicle such as a compact or subcompact car, and to an arrangement of mounting the pneumatic tires on the vehicle, which enable omitting of tire rotation without adversely affecting productivity and performances of the tires. Dimensions, shaping and contour as well as tread pattern of the tires for the drive wheel are identical or substantially identical with those for the non-drive wheels. And, wear resistance of the tires for the non-drive wheels is lower than that for the drive wheels due to discrepancy in rubber compositions for forming tire treads between the tires for drive and non-drive wheels. The wear resistance may be defined as a mileage per 1mm wear in depth direction of grooves on the tire tread around its center line.

Abstract: A pneumatic tire comprises a tread portion provided with a circumferential shoulder main groove, shoulder lateral grooves extending from the shoulder main groove toward a tread edge, and middle lateral grooves extending from the shoulder main groove toward a tire equatorial plane, the shoulder main groove extending in a zigzag manner through an axially innermost and outermost points alternately, each middle lateral groove extending from each innermost point of the shoulder main groove with an angle of 50-75 degrees with respect to a tire axial direction, and each shoulder lateral groove extending from the shoulder main groove with the same inclination direction with the middle lateral groove at an angle of 10-25 degrees with respect to the tire axial direction, wherein the number of shoulder lateral grooves is larger than the number of middle lateral grooves.

Abstract: Provided are: surface modification method for imparting slidability to surface of elastic body such as vulcanized rubber or thermoplastic elastomer without using expensive self-lubricating resin; surface-modified elastic body with polymer brush formed on its surface; and gasket for injector and injector formed of surface-modified elastic body. The surface modification method applies to surface of thermoplastic elastomer or vulcanized rubber.

Abstract: A pneumatic tire for rough terrain comprises a tread portion provided with a block having a top face and a sidewall face extending radially inwardly from the peripheral edge of the top face, wherein the top face has a polygonal shape having a plurality of sides, and the sidewall face comprises a plurality of strip surfaces extending radially inwardly from the above-mentioned sides, respectively, so as to define a corner between every two adjacent strip surfaces. At least one of the corners is chamfered by a circular arc in a cross section parallel with the top face, wherein the center of the circular arc is positioned inside the block, and the radius of the circular arc is gradually increased from the radially outside to the radially inside of the tire.

Abstract: The present invention relates to a tire having a rubber tread or rubber layered rubber tread where the rubber tread or rubber tread layers contain a dispersion of polyester phthalate within and on the surface thereof to promote a hydrophilic property for the surface. In one embodiment such promoted hydrophilic property is to promote expelling of water borne mud or snow from within the tread grooves.

Abstract: A tread rubber is made of a rubber composition containing 100 pbw of a diene rubber, 30 to 100 pbw of a reinforcing filler including at least 10 pbw of silica, and 1 to 20 pbw of microcapsules each encapsulating a heat-expandable substance. A sulfur-containing silane coupling agent is mixed in the rubber composition in an amount of 3 to 15 wt. % based on the weight of the silica. A shell material of each microcapsule is made of a thermoplastic resin which essentially contains a nitrile monomer. A vapor pressure of the heat-expandable substance is 1.4 to 3.0 MPa at 150° C. An average diameter of the microcapsules is 20 to 30 ?m before vulcanization of the rubber composition. An average diameter of the microcapsules expanded due to the vulcanization is 40 to 80 ?m. The tread rubber has a proportion of a cell-occupying area of 5 to 30%.

Abstract: The invention relates to a pneumatic tire having a cap/base configuration comprised of an outer tread cap rubber layer, with a tread running surface, and an underlying tread base rubber layer, where the base rubber layer contains syndiotactic polybutadiene with a diverse blend of carbon blacks.

Abstract: The invention relates to a tire having a tread with a cellular rubber running surface to promote a fast wearing tread running surface designed to expel internally heated tread rubber.

Abstract: A pneumatic tire having a tread, the tread comprising a rubber composition comprising: a copolymer comprising a polymeric backbone chain derived from a monomer comprising at least one conjugated diene monomer and optionally at least one vinyl aromatic monomer; and polymeric sidechains bonded to the backbone chain, the sidechains comprising a polymer capable of exhibiting a lower critical solution temperature (LCST); optionally, at least one additional diene based elastomer; and a filler selected from the group consisting of carbon black and silica.

Abstract: Provided is a pneumatic tire which is capable of securing a driving stability on dry road surfaces and concurrently of improving snow performance without worsening its pattern noise. The pneumatic tire includes four main grooves each extending in its tread part in a tire circumferential direction, and the four main grooves partition the tread part into: a center land part; paired intermediate land parts located with the center land part being interposed in between; and paired shoulder land parts located with the center land part and the paired intermediate land parts being interposed in between. Each of the intermediate land parts and the shoulder land parts includes multiple V-shaped grooves each configured of: a thick groove part extending in a tire width direction; and a thin groove part extending in the tire circumferential direction.

Abstract: A pneumatic tire (1) is provided with protrusions (200) formed on a side surface of circumferential land sections (30A, 30B, 30C) that is parallel to the tire circumference, said protrusions (200) protruding in the tread-width direction from said side surface. The protrusions (200) are formed on a buttress section (14), on the side surface of the island unit blocks (100) that is parallel to tire circumference. The protrusions (200) in the pneumatic tire (1) are positioned farther on the outside of the tire radially than the line (BL) joining the groove bottoms (40Ab) of transverse grooves (40A) formed before and after the land blocks (100) in the tire-circumferential direction.

Abstract: A heavy duty pneumatic tire has a belt and a tread such that ratio of width of the belt to width of the tread is greater than or equal to 0.95 and is not greater than 1.0. The tread has shoulder land portions on outer sides in axial direction, each shoulder portion has a cap layer including a body portion and a pad, the pad has complex elastic modulus greater than complex elastic modulus of the body portion, the body portion has loss tangent less than loss tangent of the pad, and each shoulder portion has ground-contact surface which has outer and inner ground-contact surfaces separated by boundary between the body portion and pad such that ratio of average ground-contact pressure of the outer ground-contact surface relative to average ground-contact pressure of the inner ground contact surface is greater than or equal to 0.85 and is not greater than 0.95.

Abstract: Particular embodiments of the present invention include a multi-stage tire tread having two or more wear layers comprising an outer wear layer and one or more inner wear layers arranged within the thickness of the tread below the outer wear layer. One or more outer grooves are arranged within the outer wear layer, while one or more inner grooves arranged within at least one of the one or more inner wear layers. The tread further includes a volumetric void ratio equal to approximately 0.25 to 0.40 in the unworn condition and approximately 0.25 to 0.40 in a worn condition where the outer, ground-engaging side is arranged along one of the inner wear layers in the worn condition, the tread further having a contact surface ratio equal to approximately 0.66-0.72 in the unworn condition and approximately 0.56-0.66 in the worn condition.

Abstract: A tire tread with certain features and a method for manufacturing such a tire tread are provided. More particularly, a tire tread is provided that has layers of apertures where some layers remain covered until after a certain amount of tread wear has occurred. Such apertures can comprise, for example, sipes, grooves, or other apertured features in the tread. A method of making such tire tread is also provided.

Abstract: A tyre for heavy goods vehicle comprising a tread with a thickness E having a tread surface, an asymmetrical sculpture design over at least one thickness equal to 30% of the thickness of the tread, forming an outer portion of axial width LE to be positioned axially towards the outside of a vehicle when the tyre is fitted and an inner portion of axial width LI situated in the axial extension of the outer portion, the inner portion and the outer portion separated by a groove of generally circumferential orientation, the outer portion of the tread comprising, in the circumferential direction, a succession of rigid strips of circumferential width D11 and of axial width LE having no groove or cavity opening onto the tread surface in the new state and of flexible strips of circumferential width D12 and of axial width LE provided with grooves extending over the whole circumferential width D12 of these flexible strips, the rigid strips having a circumferential width D11 at least equal to 7% of the axial width LE of t

Abstract: The invention relates to a tire with a radial carcass reinforcement comprising a crown reinforcement, itself radially capped with a tread, comprising at least two circumferentially continuous cutouts, the said tread being connected to two beads via two sidewalls. According to the invention, the crown reinforcement comprises at least one axially continuous multilayer laminate, the said laminate comprising at least one multiaxially stretched thermoplastic polymer film positioned between and in contact with two layers of rubber composition, and in a meridian plane, the axial ends of the laminate being axially on the outside of the axially outermost point of two different circumferentially continuous cutouts.

Abstract: A tire (100) is provided with blocks (10) having tread surfaces forming the tire tread surface. The blocks (10) are separated by at least one deep groove (20). The blocks (10) each have a cutout groove (12) at an end thereof in the circumferential direction of the tire. The width of the cutout grooves (12) in the width direction of the tire is greater than 2 mm and is less than or equal to 50% of the width of the blocks (10) in the width direction of the tire.

Abstract: A rubber composition usable as tread for a winter tire, having a high grip on melting ice, comprising at least one diene elastomer such as natural rubber and/or a polybutadiene, more than 30 phr of a liquid plasticizing agent, between 50 and 150 phr of a reinforcing filler such as silica and/or carbon black, and between 5 and 40 phr of magnesium sulphate microparticles.

Abstract: In a pneumatic tire in which axial grooves are arranged on an outer surface of a tread portion so as to be spaced apart from each other in a tire circumferential direction, a rib-forming region including at least one inward rib which projects from an inner surface of the tread portion inwardly in a tire radial direction and extends in a direction intersecting the axial grooves and across axial groove-inward regions inward of the axial grooves in the tire radial direction is provided in the inner surface of the tread portion.

Abstract: An agricultural tire has an equatorial plane separating first and second sides. First and second inner sixths of the treads extend between the equatorial plane and circumferential reference planes disposed axially one-sixth of a tread width on either side of the equatorial plane. First and second middle sixths of the tread extend between inner circumferential planes and middle circumferential reference planes one-sixth of the tread width from the inner circumferential reference planes. Outer sixths extend between the middle circumferential reference planes and outer circumferential reference planes disposed one-sixth of the tread width from the middle planes. Net tread volume ratio is approximately 40 percent, where between 36 and 39 percent of lug volume is in the inner sixths, between 32 to 35 percent in the middle sixths, and 27 to 30 percent in the outer sixths of the tread.

Abstract: A tyre tread includes a cellulose-based filler material placed in a cavity of the tread. The filler material includes a blend of a degradable cellulose-based thermoplastic and an unsaturated thermoplastic elastomer.

Abstract: [Object] Rolling resistance performance, high-speed-durability performance, and cornering performance are simultaneously realized at high levels. [Solution] A two-wheeled automotive vehicle tire 1 includes a tread portion having an outer surface that extends so as to be curved such that the outer surface is convex outward in the tire radial direction, and is arc-shaped. A tread rubber 2G includes a center rubber CR, shoulder rubbers SH, and middle rubbers MD. The center rubber CR includes a center cap layer CRc and a center base layer CRb. A loss tangent tan ?1b of the center base layer CRb and a width L1b thereof in the tire axial direction are each limited so as to be set within a predetermined range.