Abstract: The present invention concerns a product based on rubber, of the type comprising at least one buffer zone provided in order to trap oxygen external to the said product so as to protect from oxidation at least one sensitive zone of the said product, in which the said or each such buffer zone contains a composition based on at least one elastomer containing at least one salt of iron (III) provided to activate oxidation in the said composition, characterised in that the said salt is an iron (III) salt of an aromatic mono-carboxylic acid comprising one or more aromatic rings which may or may not be substituted.

Abstract: A standard grounding surface shape F0 becomes a maximum grounding length Lc at a tire equator C and becomes a shortest grounding length Lm between the tire equator C and a grounding edge TE. The shortest grounding length Lm is located in a region away from the tire equator C by a distance of 0.5 to 0.9 times of a tread half width TW. A rubber thickness t1 between the carcass cord and the belt cord is gradually increased outward in the axial direction of the tire from the tire equator, and the rubber thickness t1 in a half width position Q which is away from the tire equator by a distance of 0.55 times of the tread half width TW is set to 0.5 to 3.0 mm. A ratio t2q/t2c between a tread entire thickness t2q in the half width position Q and a tread entire thickness t2c in the tire equator is set to 1.01±0.05.

Abstract: The present invention is a crown-stiffening underlay structure comprised of a flat strip of elastomeric material reinforced with essentially inextensible cords. The cord-reinforced flat strip is wrapped helically around the green tire carcass prior to blowup into the characteristic toroidal shape of a tire carcass. In one embodiment, the underlay structure is disposed between breakers and the radial ply structure. In another embodiment, the underlay is disposed between the radial ply structure and the innerliner. In another embodiment, the afore described underlay structure has an additional and structurally contiguous beam made of elastomeric material.

Abstract: A pneumatic tire constructed with an electrically conductive tire tread that defines a channel extending radially inward through a tread base rubber having a relatively high electrical resistivity so as to provide a conductivity path to a belt layer within the tire. In certain embodiments, a conductivity path extending from the belt layer through a belt cushion section to a carcass section of the tire is also provided.

Abstract: Tyre for a vehicle wheel, comprising at least one first component comprising an elastomeric material which is crosslinked in substantial absence of sulphur, and at least one second component comprising an elastomeric material which is crosslinked with sulphur, said first component being in contact with said second component, in which: said elastomeric material which is crosslinked in substantial absence of sulphur, forming part of said first component, comprises an elastomeric polymer containing carboxylic groups which is crosslinked by reaction with an epoxidized liquid organic compound containing epoxide groups located internally along the molecule; said elastomeric material which is crosslinked with sulphur, forming part of said second component, comprises at least one elastomeric polymer functionalized with at least one group chosen from epoxide and carboxyl.

Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, a carcass extending between the bead portions, and a tread reinforcement disposed radially outside the carcass in the tread portion. The tread reinforcement comprises a reinforcing rubber layer and a radially outer reinforcing cord layer. The radially outer reinforcing cord layer is made of cords disposed radially outside the reinforcing rubber layer. The reinforcing rubber layer extends across the substantially overall tread width and made of a rubber material having a hardness of not less than 70 degrees and a loss tangent of not more than 0.15. In a tire meridian section, the thickness of the reinforcing rubber layer being in a range of not less than 2 mm at the tire equator and gradually decreasing towards the axial edges of the reinforcing rubber layer.

Abstract: A pneumatic tire (10) incorporates a plurality of parallel-aligned, tread-stiffening support members (23) typically disposed laterally between the tread (12) and the ply structure (16). The support members (23) inhibit lateral and circumferential tread lift during runflat operation. Support members (23) can each be a monolithic rib (22) made of a fiber reinforced plastic material. An alternative layered rib (24) has two outer layers (40, 44) of a fiber reinforced plastic material while the central layer (42) is an elastomer.

Abstract: The present invention provides a rubber-based product usable as a tire cover which is composed of a buffer zone and a zone sensitive to oxidation (sensitive zone), the buffer zone being capable of trapping oxygen external to the product so as to protect from oxidation at least one sensitive zone of the product. The buffer zone contains a basic composition composed of at least one elastomer containing at least one salt of iron (III) provided to activate oxidation in the composition. Preferably, the salt is an iron (III) salt of a carboxylic acid having the general formula CnH2nO2 in which n is from 2 to 5. This product is produced by mechanically incorporating the iron (III) salt into the elastomer or elastomers contained in the composition for the buffer zone. The invention is advantageously applied in a tire cover, and imparts improved rolling resistance.

Abstract: A method for designing tires for reduced cavity noise is directed to tires of the type having architectural elements comprising at least one carcass structure anchored in each side of the tire in a bead, each bead having a base which is intended to be mounted on the tire's design mounting rim, a side wall portion extending radially upward from each bead, a reinforced summit comprising reinforcement cords disposed at a given angle, and the side wall portions joining the summit. The method includes the step of arranging the architectural elements to provide a flexibility level of at least a portion of the summit to allow said portion to vibrate at a frequency substantially corresponding to the cavity mode.

Abstract: A vehicle tire is described having at least one carcass ply extending between bead regions, a tread region (1) and a belt arrangement (3) disposed between the carcass and the tread as well as a tread profile provided in the tread region having at least one overwide circumferential groove (2) disposed in particular away from the middle and on the inner side of the tire, with the tire region disposed beneath the overwide circumferential groove, which has in particular a width of more than 30 mm, being formed with additional localised reinforcement in the axial direction.

Abstract: A two-piece tire assembly has a removable tread belt 12 for installing about the circumference of a tire carcass 14. The tread belt has a pair of lateral ends each axially extending beyond the inflated unloaded carcass 14 at the circumferential surface by a distance of at least 4% of the width as measured at the tread belt 12 and carcass 14 interface. The carcass 14 has an abrasion resistant rubber layer 82 at the tread belt interface. The tread belt 12 also has the abrasion resistance tread compound 82 at the carcass 14 interface.

Abstract: There is provided a pneumatic tire having an aspect ratio of not less than 60 and considerably improving run flat durability as compared with the conventional type of the run flat tire, wherein at least one cushion rubber layer having a loss tangent lower than a loss tangent (tan &dgr;) of a coating rubber for cords of a carcass ply is arranged between an end portion of a belt and a reinforcing rubber layer in a shoulder region and between mutually adjacent tire constitutional members. And also, when the carcass is comprised of plural plies, at least one ply is separated off in a zone beneath the belt, whereby the ride comfort against vibrations can be more improved.

Abstract: A method for applying a plurality of reinforcement belts upon a toroidal tire carcass (50). First and second reinforcement belts (56, 60) are first wrapped around the tire carcass. Then a first belt assembly (68) of a third reinforced belt (69) with elastomeric wedges (72a, 72b) embedded into side edges (70a, 70b) of the third belt is wrapped around the second belt (60) so that the side edges (62a, 62b) of the second belt are spaced from the side edges (70a, 70b) of the third belt. An outer belt (74) and a tread (80) are applied about the third belt, and the tire carcass is ready to be cured in a tire mold.

Abstract: A tire having a crown, two sidewalls and two tire beads, a carcass reinforcement anchored in the two tire beads and a belt reinforcement, said belt reinforcement including at least two superposed reinforcement plies formed with cords parallel in each ply and criss-crossed from one ply to the other forming with the circumferential direction angles (&agr;, &bgr;) ranging between 10° and 55° and characterized in that the cords of at least one of the two reinforcing plies are successively in contact, on the same side of said ply, moving from the tire equatorial plane towards one of the reinforcing ply lateral ends with a rubber bonding layer having a first modulus of elasticity and then a rubber bonding layer of a second modulus of elasticity lower than the first.

Abstract: A radial ply tire (10) has a floating reinforcement ply on the inside shoulder/sidewall region of the tire. The reinforcement ply comprises ply rubber having a gauge sufficient to delocalize flexing in the tire shoulder/sidewall region, and in one embodiment may be reinforced with 0.50 to 6.0 phr fibers. Depending on the type of tire in which the reinforcement ply is used, the reinforcement has a total gauge of 0.005 inch to 0.175 inch (0.127 to 4.445 mm). When fiber is used in the illustrated embodiment, the fiber is oriented circumferentially in the tire.

Abstract: The present invention is a crown-stiffening underlay structure comprised of a flat strip of elastomeric material reinforced with essentially inextensible cords. The cord-reinforced flat strip is wrapped helically around the green tire carcass prior to blowup into the characteristic toroidal shape of a tire carcass. In one embodiment, the underlay structure is disposed between breakers and the radial ply structure. In another embodiment, the underlay is disposed between the radial ply structure and the innerliner. In another embodiment, the afore described underlay structure has an additional and structurally contiguous beam made of elastomeric material.

Abstract: There is provided a pneumatic tire having an aspect ratio of not less than 60 and considerably improving run flat durability as compared with the conventional type of the run flat tire, wherein at least one cushion rubber layer having a loss tangent lower than a loss tangent (tan &dgr;) of a coating rubber for cords of a carcass ply is arranged between an end portion of a belt and a reinforcing rubber layer in a shoulder region and between mutually adjacent tire constitutional members. And also, when the carcass is comprised of plural plies, at least one ply is separated off in a zone beneath the belt, whereby the ride comfort against vibrations can be more improved.

Abstract: In a heavy duty radial tire, a reinforcement belt 8 outward in a radial direction of the tire and a high-strength belt 13 inward in the radial direction are arranged between a radial carcass 2 and a tread rubber 4, and an intersect angle between cord 6a of an innermost wide-width slant cord layer 6 in the reinforcement belt 8 and cord 12a of an outermost narrow-width slant cord layer 12 in the high-strength belt 13 is not less than 10° at an acute angle side, and narrow-width slant cord layers 11, 12 of the high-strength belt 13 in the tire mounted onto a rim and inflated under a maximum air pressure have a width corresponding to 20˜60% of a ground contact width of the tread rubber 4, and inclination angles of cords 11a, 12a with respect to an equatorial plane 5 of the tire are not more than 15°, and a rubber gauge t1 of a first rubber layer 14 between cord 6a of an innermost wide-width slant cord layer 6 and cord 12a of an outermost narrow-width slant cord layer 12 is 0.9˜3.

Abstract: A tire having a crown reinforcement formed of at least two working crown plies (32, 34) having axial widths L32, L34 greater than the width L33 of an additional reinforcement (33) of inextensible, substantially radial reinforcement elements, which reinforcement is arranged radially between said plies (32, 34) and is axially composed of three parts, a central part (33′) in the form of a ply formed of inextensible, substantially radial reinforcement elements and two lateral parts in the form of strips (33″), each formed of circumferential reinforcement elements, the modulus of elasticity upon traction per unit of width of a lateral strip being at most equal to the modulus of elasticity upon traction, measured under the same conditions, of the most extensible working ply.

Abstract: The present invention is a crown-stiffening underlay structure comprised of a flat strip of elastomeric material reinforced with essentially inextensible cords. The cord-reinforced flat strip is wrapped helically around the green tire carcass prior to blowup into the characteristic toroidal shape of a tire carcass. In one embodiment, the underlay structure is disposed between breakers and the radial ply structure. In another embodiment, the underlay is disposed between the radial ply structure and the innerliner. In another embodiment, the afore described underlay structure has an additional and structurally contiguous beam made of elastomeric material.

Abstract: A vehicle tire and a method for dissipating heat from a vehicle tire where the tire has sidewalls, an uppermost area over the sidewalls, a bead area and an inner layer, the inner layer being impermeable to air, a rubberized reinforcement-containing carcass, the carcass extending from the uppermost area of the vehicle tire over the sidewalls into the bead area and being anchored in the bead area by looping around bead cores that are resistant to extension, a rubber tread having one or more tread grooves located radially outside, the tread groove having a base and a groove flank, a belt reinforcement with at least one stabilizer belt located between the rubber tread and the carcass, the stabilizer belt containing rubberized reinforcement, a first rubber composition having a first thermal conductivity, and a second rubber composition having a second thermal conductivity at least about 5% greater than the first thermal conductivity of the first rubber composition, the second rubber composition being arranged in t

Abstract: A pneumatic radial tire comprises a radial carcass of at least one rubberized cord ply, a belt comprised of three rubberized cord layers, an innermost cord layer and a middle cord layer among these cord layers being a cross cord layer that cords of the layers are crossed with each other with respect to an equatorial plane of the tire, and one or more circumferential grooves provided in at least each side region of the tread portion, wherein the cords of each of the innermost cord layer and the middle cord layer have an inclination angle of 10-25° with respect to an equatorial plane of the tire, and cords of an outermost cord layer have an inclination angle of 45-115° with respect to the equatorial plane and the outermost cord layer has a width extending toward an end of the tread portion over an outermost groove edge of an outermost circumferential groove in a widthwise direction of the tread portion.

Abstract: A tire having a radial carcass reinforcement, which is surmounted by a crown reinforcement including at least two plies of reinforcement elements, which are crossed from one ply to the next, the two plies being of unequal axial widths, characterized in that each edge of the ply which is axially least wide is separated from the axially widest ply by a profiled element P of rubber mix, the profiled element P itself being separated from the liner C of the least wide ply by an edging rubber G, the profiled element P, the edging rubber G and the liner C having respectively moduli of elasticity at 10% elongation MP, MG, MC such that MC≧MG>MP.

Abstract: A pneumatic tire includes a body, a belt package, and a tread package. The tire includes a layer of rubber disposed between the body and the tread package. The layer of rubber creates a thickness of between about 0.5 millimeters and about 1.5 millimeters between the cords in the body and the cords in the belt package. The layer of rubber is fabricated from a rubber having a stiffness greater than the rubber in the body of the tire. This configuration provides a tire having improved cornering coefficient, reduced vibrational levels, and less coarse road noise with only a small increase in rolling loss.

Abstract: A heavy-transport radial tire (1) having two annular shoulder cushions (14) made of elastomeric material with a relatively low M200% modulus, and each located at a respective shoulder (9) between a reinforced body ply (4) and a tread belt (10) defined by a number of superimposed tread plies (11); and wherein a belt cushion gum strip (18), made of elastomeric material with a relatively high M200% modulus but lower than the M200% modulus of a coating skim (13) of the reinforced tread plies (11), is interposed between each annular shoulder cushion (14) and the tread belt (10) to cover at least the respective edges (20, 22) of those (11a, 11b) of the reinforced tread plies (11) facing the annular shoulder cushion (14).

Abstract: A low rolling resistance tire (1) for vehicles is described which comprises at least one belt layer (7) coaxially extending around at least one carcass ply (3), a composite tread (10) coaxially extending around the belt layer (7) and comprising a radially outer layer (12) and a radially inner layer (11), wherein the ratio between the modulus of elasticity E' at 70° C. of the radially inner layer (11) and the modulus of elasticity E' at 70° C. of the radially outer layer (12) is comprised between 1.1 and 3, and the ratio between the value of tang&dgr; at 70° C of the radially inner layer (11) and the value of tang&dgr; at 70° C. of the radially outer layer (12) is lower than 0.8. Advantageously, the tire (1) achieves a better compromise between the characteristics of rolling resistance, handling and comfort with respect to what is obtainable from known tires for the same type of use.

Abstract: A motor-cycle tire (1) comprising a ground contacting tread (2) reinforced between its edges (3,4) by a breaker assembly and having in its normally inflated fitted condition a camber value C/L of between 0.5 and 0.

Abstract: A pneumatic radial ply tire with an aspect ratio of less than 50 has a ground contacting tread radially outward of a circumferential belt structure which in turn is radially ourtward of a carcass structure. The carcass structure has a pair of bead areas that include a bead foot compatible with a conventionally-shaped wheel rim having flanges with laterally extending portions. The carcass structure has a cord-reinforced elastomeric ply layer extend laterally between the two bead areas and radially inward of the belt structure. The tread area is directly connected to the bead areas without a sidewall. Rim flange protectors comprising a continuous circumferential elastomeric projection extend laterally outward from each bead/tread area and thereby radially outward of the rim flanges.

Abstract: A tire having a radial carcass reinforcement, a crown reinforcement including at least two working crown plies of inextensible reinforcement elements, crossed from one ply to the other ply, forming angles of between 10° and 45° with the circumferential direction, and an additional, axially continuous, ply formed of continuous, inextensible and substantially radial metallic reinforcement elements made of steel, the additional ply being placed radially between the working plies, and having an axial width which is at least 1.1 times the axial width of the widest working crown ply.

Abstract: A radial medium radial truck (RMT) tire has belt or breaker plies which are reinforced by organic reinforcement cords or filaments. In one embodiment, organic monofilaments are used in the belt or breaker plies which have the following characteristics: at least 2,000 denier (2,200 dTex), a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 30 g/denier (265 cN/Tex) and a shrinkage of at most 6%. When an organic polymer reinforcement is used in the top belt or breaker in the belt package of a tire, scrapping of tires during a retreading operation because of corrosion is greatly reduced. In addition, acceptance for retreadability is increased because of reduced top belt or breaker damage, allowing for easier preparation for the retreading.

Abstract: A radial medium truck (RMT) tire has belt or breaker plies which are reinforced by organic reinforcement cords or filaments. In one embodiment, organic monofilaments are used in the belt or breaker plies which have the following characteristics: at least 2,000 denier (2,200 dTex), a tenacity of at least 3.5 g/denier (31 cN/Tex), an initial modulus of at least 30 g/denier (265 cN/Tex) and a shrinkage of at most 6%.

Abstract: A pneumatic tire includes a body, a belt package, and a tread package. The tire includes a layer of rubber disposed between the body and the tread package. The layer of rubber creates a thickness of between about 0.5 millimeters and about 1.5 millimeters between the cords in the body and the cords in the belt package. The layer of rubber is fabricated from a rubber having a stiffness greater than the rubber in the body of the tire. This configuration provides a tire having improved cornering coefficient, reduced vibrational levels, and less coarse road noise with only a small increase in rolling loss.

Abstract: A tire with a radial carcass reinforcement of maximum axial width S0, including a crown reinforcement formed of at least two working crown plies of inextensible reinforcement elements, crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, the plies having axial widths greater than the width of an additional ply of inextensible, substantially radial, metallic reinforcement elements. The additional ply is arranged radially between the working plies, the working plies being, on either side of the equatorial plane and in the immediate axial extension of the additional ply, coupled over an axial distance at least equal to 3.5% of the width S0, then being decoupled by profiled members of rubber mix at least over the remainder of the width common to the two working plies.

Abstract: A run flat pneumatic tire includes a thin annular band embedded in the crown portion of the tire wherein the band is formed with three distinct regions. Radially spaced inner and outer regions are formed of high modulus materials and a central region is formed of a material more elastic than the other two regions providing a band having high interlaminar shear strength. Reinforcing fibers are placed in various orientations in certain of the regions to enable various materials to achieve the required band stiffness for load carrying capability and the interlaminar shear strength at the central axis of the band.

Abstract: A tire comprising a tread at least one radialIy outermost reinforcing layer of belt reinforcing textile cords arranged substantially at a zero angle with respect to the mid circumferential center plane perpendicular to the axis of the tire, a carcass a tread compound which is in direct contact with the radially outward side of the cords.

Abstract: A strand 41, which is formed by twisting filaments 41a, is inserted through an untwisting device 48. The filaments 41a are untwisted and a predetermined space S is formed between the filaments. In this state, a rubber membrane coating is formed on the periphery of each filament 41a. Then, the filament is retwisted to form a rubber membrane coated strand 59. Therefore, the rubber membrane coated strand 59 has a predetermined strength against external force and is adequately adhered to the rubber so that the rubber membrane coated strand resists corrosion, absorbs vibration, and suppresses frictional heating. A belt and a ply, which use the strand, are provided.

Abstract: A tire, comprising a radial carcass reinforcement surmounted by a crown reinforcement formed of at least one working reinforcement formed of two piles of inextensible metallic reinforcement elements, which elements are parallel to each other within each ply and are crossed from one ply to the next, forming with the circumferential direction angles &agr;1 and &agr;2 of between 10° and 45°, the working plies having axial widths L1 and L2, respectively, and at least one ply, referred to as a protective ply, of axial width L3, such that L3<L2<L1.

Abstract: A heavy duty pneumatic radial tire comprises a radial carcass and a belt superimposed about an outer periphery of the carcass and comprised of at least three rubberized cord layers, cords of two adjacent layers among these layers being crossed with each other at an acute cord angle with respect to an equatorial plane of the tire to form cross cord layers, in which a narrow-width cord layer among the cross cord layers is provided with an end cover rubber having a particular 100% modulus and a space cushion rubber having a particular 100% modulus.

Abstract: A runflat pneumatic tire has a tread stiffening member radially inward of the tread 12. The tire has a deflected section height H30 under load at 30 psi inflation and a deflected section height H0 at 0 psi wherein the deflection D30 are equal to or less than D0−D30 and the net contact area at 0 psi has a perimeter dynamic contact shape of at least U shaped or rectangular.

Abstract: A vehicle tire breaker and anti-knock arrangement includes an outer tire, the outer tire having an intermediate layer of breaker of woven fabrics and mounting holes in two inward lips thereof, and a reinforcing bearing loop supported inside the outer tire and secured thereto by inserting respective pins of the reinforcing bearing loop into respective mounting holes in inward lips of the outer tire, the reinforcing bearing loop being formed of a plurality of reinforcing bearing devices connected in series by pivot pins and adapted to support the tire for enabling the vehicle to keep running when the tire leaks.

Abstract: The invention relates to a pneumatic tire wherein the crown has a ply comprised of substantially circumferentially oriented cords which are spirally wound. The winding pitch p of said cords is greater than 2.5 times the cord diameter &PHgr;. The tread compound is applied directly on said cords. This arrangement facilitates tire fabrication and assures good adherence between the tread compound and the rest of the crown of the tire.

Abstract: A pneumatic tire for an automobile having a tread portion in a two-layered structure of a cap tread layer and an under tread layer, in which the under tread layer is constituted by a center region defined by a range of 30 through 70% of a width of a first belt layer and up to 0.5 through 2.0 mm in a tire diameter direction from a second belt layer and a shoulder region extended from both end portions of the first belt layer continuously from the center region to an outer side by 30 mm at maximum on one side and having a thickness of 1.0 through 5.

Abstract: A high transverse-curvature tire for two-wheeled vehicles includes a carcass structure, a belt structure, and a tread. The carcass structure includes at least two superimposed plies provided with reinforcing cords. The belt structure includes radially-outer and radially-inner layers. The reinforcing cords of each ply are essentially parallel to other reinforcing cords of that ply and are oriented along directions inclined with respect to an equatorial plane of the tire. The reinforcing cords of at least two adjacent superimposed plies are oriented in opposite directions with respect to the equatorial plane of the tire. The carcass structure includes at least one first sheet, located between the at least two superimposed plies, made of an elastomeric material incorporating fibrous reinforcing fillers. The radially-inner layer includes at least one second sheet made of an elastomeric material incorporating fibrous reinforcing fillers.

Abstract: A pneumatic tire which comprises: a carcass extending between bead portions through a tread portion and sidewall portions; a breaker disposed radially outside a crown portion of the carcass; a pair of axially spaced high modulus edge bands disposed radially outward of edge portions of the breaker and each made of one or more high modulus cords having a sectional area SH and a 2% modulus MH and wound substantially parallel to the tire circumferential direction at a cord count DH; a low modulus middle band disposed radial outward of the breaker between the high modulus edge bands and made of one or more low modulus cords having a sectional area SL and a 2% modulus ML less than the 2% modulus MH and wound substantially parallel to the tire circumferential direction at a cord count DL; and an elongation resistance index PH of each of the high modulus edge bands, which is defined as the product of the 2% modulus MH in N/sq.mm, the sectional area SH in sq.

Abstract: A tire with radial carcass reinforcement having a maximum axial width S0 and including a crown reinforcement composed of at least two working crown plies of inextensible reinforcing elements, crossing from one ply to the next at angles of between 10° and 45° to the circumferential direction, the said plies having axial widths equal to at least 80% of the width S0, and arranged radially between the said working plies, an additional ply of reinforcing elements essentially parallel to the circumferential direction, the working plies having widths greater than the width of the additional ply by at least 16% of the width S0, and being on both sides of the equatorial plane and in the immediate axial extension of the additional ply coupled over an axial distance equal to at least 3% of the width S0, thereafter being separated by a section of rubber mix having a thickness of at least 2 mm.

Abstract: A pneumatic radial tire is provided which comprises an under-belt pad (3) provided circumferentially between edge portions of a belt (1) and a carcass in a shoulder portion thereof, the under-belt pad (3) being of a rubber compound containing 10 to 60 parts by weight of carbon black and 3 to 30 parts by weight of silica with a total amount of carbon black and silica being 20 to 65 parts by weight, 2 to 5 parts by weight of sulfur and 0.5 to 3 parts by weight of resorcin or a resorcin derivative all relative to 100 parts by weight of rubber, and 0.5 to 2 parts by weight of hexamethylene tetramine or a melamine derivative as a methylene donor relative to 1 part by weight of the resorcin or the resorcin derivative, and having a dynamic viscoelasticity E′ or 5 MPa to 10 MPa, a loss tangent tan&dgr; of 0.10 to 0.18 and a 300% modulus of 11 MPa to 15 MPa.

Abstract: A pneumatic tire, which has belts, gum strips and an overlay, which contain 2-15 phr of thermoplastic reinforcing polymer as an addition to a compound or as a replacement for 5-25 phr of carbon black, has good high speed properties.

Abstract: A retreaded tire comprised of a tread and carcass with an intervening rubber layer, conventionally referred to as a cushion, wherein the tread has an oil rich rubber-based adhesive on its inner surface at the interface between said tread and cushion. Said oil rich rubber based adhesive is free, or substantially free, of volatile organic compounds, particularly volatile organic solvents. Alternately, the oil-rich rubber-based adhesive may contain oil and volatile organic solvent wherein oil is the major component insofar as the oil and solvent is concerned.

Abstract: A high transverse-curvature tire for two wheeled-vehicles comprises a carcass structure, a belt structure including radially-inner and radially-outer layers, and a tread. The radially-inner layer comprises at least one strip made of an elastomeric material incorporating a plurality of reinforcing cords essentially parallel to one another and oriented along directions inclined with respect to the equatorial plane of the tire. The radially-outer layer includes a plurality of circumferential coils, axially arranged side-by-side, of at least one circumferentially-inextensible cord wound at a substantially null angle with respect to the equatorial plane of the tire according to a winding direction adapted to compression-stress elastomeric material portions interposed between consecutive reinforcing cords incorporated in the at least one strip of the radially-inner layer.

Abstract: To assure a positive camber thrust for a radial-ply tire including a belt of four or more plies on a carcass with rubber pads interposed therebetween, the width of the outermost belt ply is increased over the width of the adjacent belt ply and the ratio of the difference found by subtracting the tread width from the maximum belt ply width to the difference between the maximum tire width and the tread width is not less than 0.1 and not more than 0.4.