Abstract: A high speed heavy duty tire with improved bead durability, which includes: a bead core disposed in each of the bead portions; a radial carcass extending between the bead portions and turned up around the bead cores to form two turned up portions and one main portion therebetween; a belt disposed radially outside the carcass; a tapered bead apex disposed between the main portion and each turned up portion of the carcass and extending radially outwardly; and a sidewall disposed on each side of the carcass and extending from the bead base to the tread edge, wherein the sidewall comprises a lower sidewall and an upper sidewall, the lower sidewall extending radially outwardly from the bead base over a height corresponding to the radially outermost edge of a flange of the tire's regular rim, and the upper sidewall extending radially outwardly from the radially outer edge of the lower sidewall.

Abstract: A pneumatic radial tire for construction vehicle comprises a carcass of a radial structure comprised of at least one rubberized steel cord carcass ply body and its turnup portion, and a stiffener rubber arranged above a bead core between the carcass ply body and its turnup portion. In order to improve the bead portion durability of this tire, a cord distance between the carcass ply body and its turnup portion passes through greatest value, minimum value, maximum value and smallest value from the vicinity of the bead core outward in the radial direction of the tire and heights of the carcass ply body corresponding to the above minimum and maximum values as well as height of the turnup end measured from the base line satisfy particular relations to a flange height FH of the standard rim.

Abstract: A radial tire for motorcycles which comprises: at least one carcass ply of organic fiber cords arranged radially at an angle of 85 to 90 degrees to the tire equator and turned up around the bead cores to form two turned up portions and a main portion therebetween; a tread disposed radially outside the carcass and curved so that the maximum cross section width of the tire lies between the tread edges; a belt disposed radially outside the carcass and inside the tread and having at least one spirally wound cord; and a bead apex disposed between the carcass main portion and each carcass turned up portion, wherein the belt is composed of at least one spirally wound cord having an elastic modulus of not less than 600 kgf/sq.

Abstract: A pneumatic radial tire with high durable bead portions includes a pair of bead portions, a pair of sidewalls and a tread extending between the sidewalls, and further includes as a body reinforcement a carcass extending between the bead portions and consisting of plies whose cords are radially arranged. At least one ply being turned up about bead cores of the bead portions from inside to outside of the tire to form a turn-up portions. A carcass pass line in radial section of the tire in its self-holding position filled with 5% of a normal inner pressure under no-load condition includes curvature changing areas in a carcass profile curved toward the turned-up portions in the proximities of positions corresponding to a height of turn-up ends of the ply from a rim diameter line to cause compressive stresses in the bead portions near to the turn-up ends of the ply by deformations of the carcass when the normal inner pressure is filled in the tire.

Abstract: A radial tire for motorcycles which comprises: at least one ply of radially arranged organic fiber cords turned up around the bead cores to form two turned up portions and a main portion therebetween; a tread disposed radially outside the carcass to define the tread portion; sidewalls disposed axially outside the carcass to define the sidewall portions; a belt disposed radially outside the carcass and inside the tread; a bead apex disposed between the carcass main portion and each carcass turned up portion and extending radially outwardly and taperingly from the bead core; the radial height of the radially outer edge of each carcass turned up portion being 0.3 to 0.5 times the radial height of the tread edge, both from the bead base; the radial height of the radially outer edge of each bead apex from the bead base being 0.3 to 0.5 times the radial height of the tread edge; the belt composed of at least one spirally wound cord having an elastic modulus of not less than 600 kgf/sq.

Abstract: A pneumatic radial tire having a bead portion in which at least two reinforcing layers comprising a steel cord reinforcing layer and a fiber cord reinforcing layer are arranged outer to a turnup portion of a carcass layer and are covered with a rubber stock, the bead portion being capable of exhibiting an enhanced durability.

Abstract: A heavy duty radial tire and rim assembly exhibiting improved bead durability, wherein the bottom face of the bead is composed of an axially inner face Si and an axially outer face So each tapered axially inward to decrease the diameter of the bottom face, the taper in the inner face Si is greater than that of the outer face So, the boundary between the inner face Si and the outer face So is located axially inward of the center of gravity of the bead core, and in the condition that the tire is mounted on a regular rim and inflated to a regular pressure, the axial distance X of the axially inner edge Q2 of the bead core from a bead heel Q1 defined as an intersection between a rim base line B and an extending line of the inner surface of a rim flange of the rim is not less than 80% and not more than 105% of the height HR of the radially outer edge Q3 of the rim flange from the rim base line; and the radial distance Y of the radially outer edge Q4 of the bead core measured radially inwardly from the radially out

Abstract: A run-flat tire and rim assembly for All Terrain Vehicles comprising: (A) a run-flat tire having beads with a radially inwardly protruding toe and a bead apex; (B) a rim having bead seats with a circumferentially extending groove with which the toe is engaged; (C) the height of the radially outer end of the bead apex being in a range of 15% to 30% of the tire section height; (D) the thickness of the rubber layer on the outside of a carcass in the tire sidewall regions being at least 10 times the diameter of the carcass ply cord; (E) the above-mentioned thickness decreasing gradually from a maximum tire section width point to the tire shoulder so as to form a weak portion in bending in each shoulder; (F) a circumferentially extending buttress provided in each shoulder; and (G) a hump with a diameter larger than the rim diameter formed axially inward of and adjacent to each bead seat of the rim.

Abstract: A tire and rim assembly including a flanged rim and a tubeless tire with 15.degree. taper bead parts. The tire includes a carcass having a main body portion extending from a tread part through sidewall parts to the bead parts and turned up portions each turned up around a bead core of the bead part from axially inside to outside. In each bead part, a first reinforcement layer of steel cords and a second reinforcement layer of steel cords are provided. The first reinforcement layer has an inside part extending along the inside surface in the axial direction of the body portion, and an outside part contiguous to the inside part and extending along the outside surface in the axial direction of the turned up portion. The second reinforcement layer extends from a radial position substantially level with the bead heel end and is interposed between the inside part and the main body portion along the main body portion so as to form an overlapping portion with the inside part.

Abstract: A pneumatic radial tire for construction vehicles comprises a radial carcass of rubberized steel cord ply, a stiffener rubber disposed on a bead core, and at least two reinforcing layers of rubberized fiber cord fabrics having different cord directions as a bead portion reinforcement. This reinforcing layer satisfies the particular height relations to the carcass ply and its turnup portion.

Abstract: A radial tire for high load which possesses excellent vibration damping performance, wherein a carcass cord reinforcing layer composed of fiber cords laid at a bias angle of between 30 and 90 degrees with respect to the radial direction of the tire is arranged adjacent to a carcass ply of a radial arrangement so that both edges thereof in the radial direction overlap with a belt and a bead reinforcing layer respectively by a certain amount.

Abstract: A high speed tire for heavy duty vehicles includes a carcass in a radial structure, a belt layer, tapered bead apex rubbers, side packing rubbers of small thickness, and side wall rubbers. The carcass has a main body part extending from a tread part through side wall parts to a bead core in each of two bead parts, and folding-back parts each being folded back around the bear core at each edge of the main body. Each of the bead apex rubbers extends outward in the radial direction between the main body part and the folding-back part from the bead core. Each of the side packing rubbers is disposed along the outside surface in the tire axial direction of the carcass. Each of the side wall rubbers covers the packing rubber and extends from the bead part to the side wall part so as to form the outside surface of the tire. Furthermore, the 100% modulus MP of the side packing rubber is 53 to 95 kg/cm.sup.2, the 100% modulus MA of the bead apex rubber is 78 to 120 kg/cm.sup.

Abstract: A heavy-duty pneumatic radial tire having a bead portion comprising a carcass layer having its respective end portions turned up about a bead core from the inner side to the outer side of the tire and at least two reinforcing layers disposed along a portion of the carcass layer, which tire comprises an inner reinforcing layer having a tenacity of from 30 kg/mm of layer width inclusive to 80 kg/mm of layer width not inclusive, incorporated on the inner side of the bead portion, and an outer reinforcing layer having a greater tenacity than the inner reinforcing layer and of at least 80 kg/mm, of layer width incorporated on the outside of the bead portion, wherein cords in the inner reinforcing layer and those in the outer reinforcing layer are inclined in a same direction relative to the radial direction of the tire, and when mounted on a vehicle the direction of inclination of the cords in the inner and the outer reinforcing layers is opposite the direction of forward rotation of the tire.

Abstract: A pneumatic radial tire having at least one carcass ply, distal ends of which are folded back axially outwardly about a pair of bead cores to form respective turn-up portions. A hard rubber sheet is disposed on the outer side of each turn-up portion in such a manner as to partially overlap with the same in a mutually space-apart relationship, and a soft rubber material which is softer than the hard rubber sheet is interposed between the turn-up portion and the hard rubber sheet, thereby reducing the amount of stress and heat ocurring in the vicinity of the end portions of the turn-up portions of the carcass ply.

Abstract: A radial tire including at least one carcass layer extending from one of a pair of bead cores to the other bead core and composed of cords arranged radially of the tire, a belt layer provided over the crown portion of the carcass layer radially outwardly of the tire, and a bead filter rubber portion positioned on each bead core and extending radially outwardly of the tire, the carcass layer having opposite ends folded over the respective bead cores from the bead toe side toward the bead heel side, forming return portions, at least one of the return ends portion being positioned radially outwardly of the radial outer end of the bead filler rubber portion. The tire has a reinforcing layer of organic fiber having a bias angle of 40 to 60 degrees and adhered to the inner side of the bead filter rubber portion, the reinforcing layer extending along the filler rubber portion from a position radially inwardly of the bead core, and a rubber cushion having 0.5 to 1.

Abstract: To improve the tire transversal rigidity and further the tire contact area with the ground, that is, to improve the tire cornering power or vehicle turning performance, the tire inner sidewall portion is reinforced by a carcass turned-up end portion, a hard rubber filler, and at least one inclined cord layer by extending all the radially outward ends thereof to roughly the middle of the tire sidewall. Further, the maximum carcass width position is located radially outward away from a bead heel by a distance (V) of at least 60% of a tire section height (J) before inflation but located radially outward away from the bead heel by a distance (U) of about 55 to 75% of the above before-inflation distance (V) after inflation, and the axial bead heel distance (A) between the two opposite beads before inflation is determined smaller than that (B) therebetween after inflation.

Abstract: A tire and rim combination comprising a carcass turned up around bead cores from the axially inside to the outside thereof to form turned up portions; bead filler ply disposed between the carcass and each bead core and having an axially inner portion and an outer portion; and a chafer having a main portion extending along the bottom of the bead and an outside portion extending radially outwardly from the main portion along the axially outside the carcass turned up portion,the height F of the edge of the outer portion of the bead filler ply,the height P of the edge of the turned up portion of the carcass,the height C of the edge of the outside portion of the chafer,and the height A of the edge of a flange of said rim for the tire, the heights F. P, C and A being the height from the bead base, respectively, and satisfying the following conditions:0.8.ltoreq.C/A<10.64.ltoreq.P/A<0.80.4.ltoreq.

Abstract: A pneumatic tire for a passenger car characterized in that a rubber chafer around bead portions is composed of a laminate member consisting of a soft rubber layer which is at least 0.2 mm thick and a hard rubber layer which is thicker than the soft rubber layer, the soft rubber layer being made of a rubber having a JIS hardness Hs of 50 to 65, a complex elastic modulus E* of at least 3.0 MPa and a compression set of up to 25% and disposed outside, and the hard rubber layer being made of a rubber having a JIS hardness Hs of 70 to 85, a complex elastic modulus E* of at least 6.0 MPa and a compression set of up to 32% and disposed inside.

Abstract: A heavy duty radial tire and rim assembly comprising a pair of bead cores, a carcass, a belt, and a pair of bead apexes, wherein in at least one of the bead portions, when the tire is mounted on a normal rim specified for the tire and inflated to a normal pressure, a thickness center line of a carcass turnup portion between two points is cured and located axially inward of a straight line drawn between the two points, the quotient (X/HR) of the axial distance (X) of the inner end (Q2) of the bead core from a bead heel point (Q1), to the height (HR) of a flange of the normal rim is in a range of 0.8 to 1.05, wherein the bead heel point (Q1) is defined as in intersection of an extension of the outer surface of the bead portion with an extension of the bead base, and the quotient (Y/HR) of the radial distance (Y) from the radially outer end (Q3) of the flange of the rim to the radially outer end (Q4) of the bead core, to the height (HR) of the flange of the rim is in a range of 0 to 0.3.

Abstract: The invention relates to a pneumatic radial tire for heavy duty vehicles such as trucks, buses etc., having an improved reinforced structure of bead section, which can be effectively improved in the durability under very heavy load conditions and can be recapped two or three times without damaging the base tire.The radial tire for heavy duty, comprises: a carcass ply (2) of a radial or a semi-radial construction composed of at least one rubberized metal cord ply; a first metallic cord reinforcing layer (4) disposed at the outside of the turned up portion (2') of the carcass ply (2); and a second fiber cord reinforcing layer (6) secured to the inner surface of the carcass ply main portion.The radially inner portion of the second reinforcing layer (6) is interposed by a given width (L) between the turned up portion (4') of the first reinforcing layer (4) and the main portion of the carcass ply in bead base portion.

Abstract: An off-the-road heavy duty pneumatic radial tire running on severely rough roads comprises a rubber reinforcing layer having a partial crescent shape in section and a JIS hardness of 55.degree..about.75.degree. and a particular thickness distribution over a range from the bead portion to the vicinity of the belt end portion as a reinforcement for the sidewall portion, whereby the stable running performances and the carcass durability in bead portion can simultaneously be improved to give good resistance to lateral rolling and followability on uneven road surface to the vehicle running on rough roads.

Abstract: The bead durability of the heavy duty pneumatic radial tire for truck and bus is improved by arranging a rubber stock composed of three rubbers A, B and C each having particular properties between a carcass ply and its turnup portion in the bead portion and/or rendering the turnup portion of the carcass ply in the bead portion into a particular arrangement.

Abstract: A radial tire for a construction vehicle includes a tread, a pair of sidewalls extending radially inwardly and terminating in inner edges having bead cores embedded therein, a carcass made of a steel cord ply extending between the bead cores, a belt arranged between the carcass and the tread to form with the carcass a main reinforcing layer, and bead reinforcing layers. Each of the bead reinforcing layers includes at least two sets of fiber cord layers. Each of the sets has at least two fiber cord layers. The at least two sets of the fiber cord layers are arranged extending radially outwardly from the proximity of an axially outer portion of the bead core and spaced each other to have a minimum spaced distance in the proximity of the bead core and a maximum spaced distance at radially outer end between the two sets of fiber cord layers, said fiber cord layers within said sets being substantially uniformly spaced from each other.

Abstract: A tire for a large vehicle includes bead portions having bead cores around which a carcass ply layer is turned up from an inside to an outside of the tire. The tire includes a first elastomer protective layer A, a second elastomer protective layer B and a third elastomer protective layer C. These protective layers A, B and C have dynamic storage moduli E' A: 7-20.times.10.sup.7 (dyn/cm.sup.2), B: 10-25.times.10.sup.7 (dyn/cm.sup.2) and C: 2-10.times.10.sup.7 (dyn/cm.sup.2) and relations of the dynamic storage moduli in B>A>C, B-A>2.times.10.sup.7 and A-C>2.times.10.sup.7, and have loss tangents .delta. A: 0.15-0.22, B: 0.18-0.25 and C: 0.05-0.16 and a relation of loss tangents in B>A>C.

Abstract: A radial ply tire for heavy duty vehicles improved in bead durability, which has a bead reinforcing cord layer having an axially inner portion extending along the inside of the carcass main portion, and an inner liner disposed on the inside of the carcass main portion and the inside of the inner portion of the bead reinforcing layer, whereinthe inner liner is provided with a middle portion of which thickness is gradually decreased radially outwardly,the heights of the lower end and upper end of the middle portion are respectively not smaller than 1.2 and 1.4 times the height of the upper edge of the axially inner portion of the reinforcing layer,the difference in thickness between the upper and lower ends of the middle portion is between 0.5 and 1.0 times the thickness at the upper end of the middle portion, andthe thickness at 90% of the height of the upper edge of the axially inner portion of the reinforcing layer is between 0.9 and 1.2 times the thickness at the upper end of the middle portion.

Abstract: A pneumatic radial tire characterized in that:an inner carcass layer is turned up around each bead core from inside to outside in such a manner as to wrap a bead filler therein;a steel cord reinforcing layer is disposed outside the inner carcass layer;an outer carcass layer is disposed in such a manner that it covers the outside of the steel cord reinforcing layer and its end portion extends to at least near the bead core;a second filler is disposed outside the outer carcass layer;the second filler has a hardness below that of the bead filler and within the range of 70 to 93 in terms of JIS hardness;the cord angle of the steel cord reinforcing layer is from 15.degree. to 30.degree.

Abstract: A radial tire for heavy loads, comprises: a pair of bead cores; a carcass the ends of which are turned up around the bead cores to form a carcass main part and a carcass turned up part on the axially inside and the outside of the bead core, respectively; a metallic cord reinforcing layer turned up around the bead core to form (a) an outside part extending along the axially outside of the carcass turned up part and (b) an inside part extending along the axially inside of the carcass main part; an outside reinforcing layer of organic fiber cords disposed axially outside the outside part of the metallic cord reinforcing layer; an inside reinforcing layer of organic fiber cords disposed on the axially inside of the carcass main part; a bead apex between the carcass main part and the turned up part extending radially outwardly beyond the radially outer end of the outside reinforcing layer; a rubber chafer disposed outside the outside reinforcing layer; and an inner sidewall disposed between the outside reinforcing

Abstract: A pneumatic tire has a pair of axially-spaced annular tensile members forming a part of each bead. One or more continuous carcass plies extend between the annular tensile members and have lateral edge portions which are folded axially and radially outwardly around one of the annular tensile members. An air-impermeable liner is disposed axially and radially inwardly of the carcass plies. A layer of air-permeable rubber extends from a point axially inward and radially outward of one of the annular tensile members and is folded axially and radially outwardly around one of the annular tensile members such that the layer of air-permeable rubber abuts a rim flange when the tire is mounted. An air-impermeable gum strip is interposed between the layer of air-permeable rubber and the carcass plies such that the gum strip extends from a point radially outward and axially inward of one of the annular tensile members to a point radially beneath such annular tensile member.

Abstract: The invention relates to a run-flat tire and rim assembly for all-terrain vehicles (ATV), wherein the rubber thickness of the tire sidewall is at leat 10 times the diameter of the ply cords of a carcass; the height of the radially outermost end of a tire bead apex from the tire bead base is within a range of 20 to 40% of the section height of the tire; each tire bead has a toe with a protrusion protruded radially inwardly from the bead base and a hump groove axially outward of the protrusion; the bead toe comprises a toe strip having a JIS A hardness of 65 to 95; and the rim is provided with a well in the center portion, a pair of bead seats one on each side of the well, a pair of humps one formed axially inward and adjacent to each bead seat to be engaged with the hump grooves of the tire beads and a pair of grooves one formed axially inward of each hump to receive the protrusions of the tire bead toes.

Abstract: A radial tire (20) for motor vehicles, on which a body ply (6) presents two lateral portions (8) turned substantially 360.degree. about respective beads (4) and joined, by an end portion (9), to the outer surface of a center portion (7) of the body ply (6) immediately over the beads (4); each lateral portion (8) of the body ply (6) turned about the bead (4) being gripped between an innerliner (10) and an outer abrasion strip (12) integral with each other; and each abrasion strip (12) presenting a section of varying thickness, to compensate for the absence of a bead filler.

Abstract: A reinforced radial tire bead construction for heavy load vehicles, such as trucks and buses, which has excellent durability and recapability. The tire has a carcass ply turnup wrapped around a bead core and a relatively soft rubber apex strip. A steel cord reinforcing layer surrounds part of the turnup and a layer of organic fiber cords is outside the steel cord layer and extending to a greater radial height. Between the turnup ends and the inner surface of the organic cord layer is a rubber strip of relatively soft material. Between the carcass ply main portion and the soft rubber apex strip is a rubber band of relatively harder material.

Abstract: The invention relates to a pneumatic radial carcass type tire for heavy duty use having an improved reinforcing structure for the bead region. In a tire comprising a four ply radial carcass (1), the two bead regions are each reinforced by a bead core (2) and an axially inner (6) and an axially outer (7) textile reinforcing layer and a rubber apex strip (8). As compared to the prior art, the relatively low rubber apex strip (8) and the resulting low separation point between the first (3) and second (4) set of carcass plies reduces the sheer stresses between these carcass plies while the specific arrangement of the axially inner (6) and axially outer (7) textile reinforcing layers, retains the required stiffness in the bead region (5). In a preferred embodiment of the invention the axially inner (6) and axially outer (7) textile reinforcing layers comprise square woven fabric which help towards reducing the ply waviness of both the reinforcing layers (6,7) and the carcass plies (3,4).

Abstract: An pneumatic radial tire for a passenger car having an improved durability, which tire has a carcass layer formed of aromatic plyamide cords in which an end portion of the carcass layer is turned up around an annular bead wire and a lower bead filler from the inside to the outside of the tire to form a turnup portion which is extended along the main body of the carcass layer, wherein an upper bead filler having a JIS hardness of from 75 to 95 is disposed axially outside the turnup portion, and wherein the height b (mm) of the lower bead filler relative to the height a (mm) of a rim flange upon which the tire is mounted satisfies the formula:(a-5)<b<(a+10)wherein a is the G dimension specified by JIS-D-4218-1981.

Abstract: A radial tire comprises a carcass, a tread thereon, a breaker therebetween, bead cores, and rubber bead apexes, and is characterized in that:(a) the clip width (C1) is smaller than the rim width (C2) of a normal rim for a tire;(b) the carcass (6), in a state of the tire mounted on the normal rim and inflated to a standard pressure, has:an outwardly bulging outer part (21) between the largest width point (D) and a radially outer second point (E2),an outwardly bulging middle part (22) between the largest width point (D) and a inflexion point (F), andan inwardly bulging inner part (23) between the inflexion point (F) and a radially inner first point (E1);(c) the radial height (H2) of the largest width point (D) from the first point (E1) is 50-40% of the height (H1) of the second point (E2);(d) the axial distance (L1) between the largest width point (D) and a third line (X3) is 28-33% of the height (H1); and(e) the axial distance (L2) between the inflexion point (F) and the third line (X3) is 70-55% of the distan

Abstract: To prevent bead displacement under heavy load or to improve bead durability without increasing tire weight and decreasing tire productivity, the carcass is sandwiched between two reinforcing layers near the bead in such a way that metallic cords of the carcass and the two reinforcing layers, extending in three different directions, provide a triangular reinforcement structure. The radial distance H.sub.1 of the first reinforcing layer from the rim is 0.3 to 0.7 H (where H denotes a radial distance between the rim and the maximum tire width position); the radial distance H.sub.2 of the first reinforcing layer is 0.25 to 0.6 H; the radial distance H.sub.3 between H.sub.1 and H.sub.2 is 0.05 H or more; and the radial overlap distance .alpha. between two reinforcing layers is 0.1 H or more. Further, the overlap length l between the two layers is 0.25 L or more (where L denotes the width of the first reinforcing layer).

Abstract: A heavy duty pneumatic radial tire is disclosed, which comprises a single carcass ply having aromatic polyamide fiber cords at a cord angle of about 90.degree. relative to a tire equatorial plane, a pair of bead cores, and first and second reinforcing layers successively laminated axially outside turn-up portions of the carcass ply. A height of the turn-up portion is from 0.075 to 0.16 time that of the carcass ply in a tire section. The first reinforcing layer comprises steel cords arranged obliquely to the carcass ply cords, and has a radially outer end higher than an end of the turn-up portion. The following relation exists among a.sub.1, d.sub.1, a.sub.2, d.sub.2, T.sub.1 and T.sub.2 : ##EQU1## in which a1, d.sub.1, a.sub.2, d.sub.2, T.sub.1, and T.sub.

Abstract: A heavy duty pneumatic radial tire for use in airplanes and the like is disclosed, which comprises a toroidal radial carcass, a belt superimposed about a crown region of the carcass, and a bead portion reinforcement comprised of a main chafer made from aromatic polyamide fiber cords, and an auxiliary chafer of at least two outer cord layers and at least two inner cord layers having a triangular truss structure defined by three cord layers among such four cord layers that the cords of the two outer cord layers are crossed with each other with respect to the meridional plane of the tire and the cords of the two inner cord layers are crossed with each other with respect to the meridional plane.

Abstract: In a pneumatic radial tire for heavy duty vehicles having a pair of bead portions, each of the bead portions comprises at least first, second and third chafer plies disposed around the carcass. The third chafer ply has a cord angle larger than those of the first and second chafer plies. The first, second and third chafer plies have a first chafer height h.sub.1 measured in the radial direction from a laterally outward and radially outermost end of the first chafer ply to a heel point at which a bead base of the bead portion and a flange portion of a rim having mounted the bead base thereon are intersected with each other, a second chafer height h.sub.2 and a third chafer height h.sub.3, respectively. The carcas has a fold-back height H measured in the radial direction from a radially outermost end of the fold-back portion thereof to the heel point, the first, second and third chafer heights h.sub.1, h.sub.2 and h.sub.

Abstract: A tire structure that is especially advantageous for an aircraft tire has a pair of annular elastomeric members (40,41) disposed axially inwardly of the carcass plies (13,14) to maintain the carcass plies in a desired configuration. A preferred arrangement of bead reinforcing strips (32,33,34,35) is disclosed for use in tires that are intended for mounting on H-type aircraft rims.

Abstract: A high performance passenger tire features improved bead assemblies. The bead assemblies include a split ply formed of two short insert plies of rubberized steel cords bent around the bead cores with their inside ends extending radially outwardly from the bead cores a distance greater than the distance from their outside ends to the bead cores. The cords of the insert plies form low angles with respect to the circumferential center line of said tire. The bead assemblies have extended utility when utilized in high performance belted radial pneumatic tires.

Abstract: A pneumatic radial tire for motorcycle is disclosed, which comprises a tread, a pair of sidewalls, a carcass composed of at least one rubberized ply containing organic fiber cords arranged in a direction of approximately 90.degree. with respect to the equatorial plane of the tire, and a belt disposed between said tread and said carcass at a width corresponding to a tread width and composed of at least two rubberized plies each containing cords with a modulus of elasticity of at least 600 kg/mm.sup.2 arranged at an inclination angle of 15.degree.-30.degree. with respect to the equatorial plane of the tire. In the tire, each end of the carcass is wrapped around a bead ring embedded in each radially inner end portion of the sidewalls toward a direction of the tread to form a turnup portion; a tapered rubber filler extending from an upper part of the bead ring toward the tread direction and having a Shore A hardness of at least 60.degree.

Abstract: A pneumatic tire for a two-wheeled vehicle, including a pair of sidewalls, a tread, a carcass, bead rings embedded in radially inner ends of the pair of sidewalls and stiffeners including tapered rubber fillers. According to the invention, the tire comprises a belt layer between the tread and the carcass. The belt layer consists of at least one ply whose width is at least 0.5 time of a width of the tread. Cords of the ply have a modulus of elasticity of at least 600 kg/mm.sup.2 and are arranged substantially in parallel with an equatorial plane of the tire.The tire according to the invention maintains a hoop effect of the belt layer to sufficiently exhibit characteristics as a radial tire and eliminates an extreme difference in bending rigidity in radial directions over from the tread to the sidewalls to obtain smooth turning of the two wheeled vehicle at a corner.

Abstract: A heavy duty pneumatic radial tire is disclosed, having bead portions with an improved durability. The tire is provided with a carcass of at least one ply, including a carcass body extending between both bead portions of the tire, and turn-up portions which are contiguous with the carcass body and arranged around and radially outwardly of bead wires. In a particular radial region of the tire, the distance G between center lines of the carcass body and the turn-up portion of the carcass is optimized in accordance with relevant dimensional parameters of the tire, to minimize strains and suppress separations in the bead portions.

Abstract: A radial tire for passenger cars comprising a rubber filler interposed between a turn-up portion of a carcass ply wound around a bead ring from the inside toward the outside thereof and the carcass ply and having a dynamic modulus of elasticity of at least 300 kg/cm.sup.2 and comprising an additional layer closely adhered to said rubber filler and composed of cords having a high modulus of elasticity which is larger than 2.5.times.10.sup.5 kg/cm.sup.2 and inclined at an angle within a range between 45.degree. and 75.degree. with respect to the carcass cord, the additional layer being arranged over a range which is 50% to 75% of the tire sectional height.

Abstract: A heavy duty pneumatic radial tire includes a carcass consisting of at least one layer of metal cords substantially radially arranged, a breaker consisting of at least two layers of metal cords to form a main reinforcement with the carcass, and bead portions including hard and soft stiffeners. The carcass has a particular radial profile having a ratio of radii R/R' determined by a radius R' of a standard circle and a radius R determined by a particular definition and has a maximum distance f between an arc of the standard circle and the remaining carcass line smoothly extending from the profile curvature of the shoulder. Moreover a radial profile over a radially inner zone of the sidewall of 20-45% of the radial height SH has a curvature 1/.rho. less than 6.times.10.sup.-3 mm.sup.-1 at a location 32.5% of the radial height corresponding to a center of the profile.

Abstract: Radial tires for motorcycles comprising a tread portion, side wall portions, bead portions, a carcass, bead apexes made of a rubber having a high hardness, and optionally reinforcing cord layers arranged outside the bead apexes, said tread portion having shoulder grooves at the shoulder portion thereof and center grooves at the center portion thereof and the depth of the shoulder grooves being from 5 to 50% of the depth of the center grooves, whereby cracking of the shoulder groove bottom caused by providing the bead apexes made of a hard rubber or the reinforcing cord layers is prevented.

Abstract: A tire having a pair of axially spaced-apart bead regions each reinforced by an annular bead hoop around which one edge of a carcass reinforcing ply is wrapped and a filler strip positioned in the axially outer region of the bead. The filter strip which extends circumferentially around the bead, has one edge radially inwards of the bead hoop and one edge axially outwards of the bead hoop characterized in that the filler strips in both beads have their cords laid at an angle to the same specified direction circumferentially such that the cords of one filler strip are substantially parallel to the cords of the other filler strip. The tire has an external direction marker in the same circumferential direction to the specified direction so that in use the tire may be fitted to a vehicle with the marker in the opposite direction to the greatest torque force from the wheel. The filler strip may be cut edge tire cord fabric or a single cord laid in a zig-zag to form the fabric.

Abstract: A pneumatic radial tire for a motorcycle, in which a carcass layer is disposed so as to extend from one of the tire's bends to the other, and belt reinforcing layers are disposed outside the carcass layer at the tread. In this pneumatic radial tire, a cord reinforcing layer is disposed outside the carcass layer so as to extend from a shoulder around the bead and up the tire's side wall, and at least one of the end portion of the cord reinforcing layer on the shoulder side and the turn-up end portion is stacked between the end portions of the belt reinforcing layer and the carcass layer.

Abstract: A pneumatic radial passenger-car tire comprising a carbon fiber cord layer disposed between a carcass layer on the side of an inner liner and a bead filler all along the circumference of the tire, and having a height thereof between a bead heel and the top end thereof equal to or larger than the height of the bead filler between the bead heel and the top end thereof.

Abstract: The invention relates to a pneumatic radial carcass type tire for heavy duty use having an improved reinforcing structure for the bead region. In a tire comprising a four ply radial carcass (1), the two bead regions are each reinforced by a bead core (2) and an axially inner (6) and an axially outer (7) textile reinforcing layer and a rubber apex strip (8). As compared to the prior art, the relatively low rubber apex strip (8) and the resulting low separation point between the first (3) and second (4) set of carcass plies reduces the sheer stresses between these carcass plies while the specific arrangement of the axially inner (6) and axially outer (7) reinforcing layers retains the required stiffness in the bead region (5). A particular durable bead region (5) is thus obtained.