Abstract: A pneumatic tire is provided. A bead filler is disposed on an outer circumferential side of each bead core in bead portions, a side reinforcing layer having a crescent-shaped cross-section is disposed on an inner side in a tire width direction of a carcass layer in a sidewall portion, and as physical properties of a rubber that constitutes the side reinforcing layer and a rubber that constitutes the bead filler, a modulus at 100% elongation is in a range from 8.4 MPa to 10.2 MPa, a tan ? at 60° C. is in a range from 0.04 to 0.08, and JIS hardness at 20° C. is in the range from 75 to 79.

Abstract: A run-flat tire includes: sipes formed in blocks; a belt reinforcing layer on an outer side in a radial direction of a belt layer; and a side reinforcing rubber in sidewall portions, wherein a density of the sipes in a center block is from 0.10 cords/mm or greater to 0.30 cords/mm or smaller, the belt reinforcing layer includes a center reinforcing portion in which more center reinforcing portions are stacked at a center region than at positions other than the center region, a width Wc of the center reinforcing portion is within 0.5 Gr?Wc?2.5 Gr with respect to a thickness Gr of the side reinforcing rubber at the tire maximum width position, and an average width of the width Wc of the center reinforcing portion is from 50% or greater to 90% or smaller of a width of the center block.

Abstract: In a pneumatic tire, a partial tie rubber layer is disposed between a carcass layer and an innerliner layer in a limited manner across an entire region excluding end portions near a pair of bead portions; end surfaces on both sides in a tire lateral direction of the partial tie rubber layer are inclined surfaces that form an acute angle with respect to a surface of the partial tie rubber layer on the carcass layer side; and an inclination angle of the inclined surfaces with respect to the surface of the partial tie rubber layer on the carcass layer side is from 20° to 60°.

Abstract: A tire suitable for running flat comprises a crown, two sidewalls and two beads, a carcass reinforcement with at least one carcass ply anchored in each bead and a sidewall insert placed axially internally relative to at least the carcass ply, wherein the tire is equipped with an electronic device comprising at least one radiofrequency transponder and wherein, each bead comprising a bead wire of revolution about a reference axis and H being one of the points of the bead wire closest to the axis of revolution, the electronic device is placed axially in a zone of the tire bounded by at least one of the beads and one of the sidewalls and radially externally at a radial distance larger than 20 mm from the point H.

Abstract: A run-flat tire includes a side reinforcing rubber layer, a first bead filler on an inner side of a carcass turned-up portion in a width direction, and a second bead filler on an outer side of the carcass turned-up portion in the width direction. A first bead filler height is 30% or less of a tire cross-sectional height SH. A second bead filler height is 50% or greater of the height SH. A cross-sectional area of the second bead filler is from 150% to 400% of a cross-sectional area of the first bead filler. A relationship (0.16×SH×LI?1100)?SALL?(0.16×SH×LI?800) is satisfied, where SALL represents a sum of cross-sectional areas of the side reinforcing rubber layer and the first and second bead fillers, and LI represents a load index.

Abstract: A run-flat tire includes reinforcing rubber in a sidewall, first bead filler rubber disposed toward the inside of a folded back portion of a carcass layer in a lateral direction, and second bead filler rubber disposed toward the outside of the folded back portion in the lateral direction. The reinforcing rubber has a thickness from a rim base line to a position within 38% to 68% of a tire cross-sectional height being from 90% to 100% of a maximum thickness of the reinforcing rubber. In a range from a position of a rim check line to a position being 38% of the tire cross-sectional height from the rim base line, a total thickness of the reinforcing rubber, the first bead filler rubber, and the second bead filler rubber is from 100% to 140% of the maximum thickness of the reinforcing rubber.

Abstract: A rubberized reinforcing ply (1) for articles consisting of an elastomeric material, preferably for vehicle tires, wherein the reinforcing ply (1) has a multiplicity of textile strengthening members (2) which are arranged parallel to and spaced apart from one another, wherein each textile strengthening member (2) is composed of at least one twisted multifilament yarn, and wherein the textile strengthening member (2) is not composed of the material rayon. The reinforcing ply (1) satisfies the following condition: (D2/E0) in mm corresponds to a value in a range from 0.22 mm to 0.38 mm, and the reinforcing ply (1) has a strength of >10 kN/dm, where D is the diameter of the textile strengthening member (2) in mm and lies in a range from 0.38 mm to 0.52 mm, and where E0=100/epdm.

Abstract: A rubber composition that is capable of providing vulcanized rubber excellent in the abrasion resistance without the deterioration of the crack resistance and the low heat generation property is provided. The rubber composition contains: (A) a rubber component; (B) carbon black having a CTAB specific surface area of 110 to 160 m2/g, a half value width ?D50 of a peak including a Stokes equivalent diameter Dst obtained by a centrifugal sedimentation method of 60 nm or less, and ?D50/Dst of 0.95 or less; and (C) silica having a CTAB specific surface area of 200 m2/g or more, has a total amount of a content (b) of the carbon black (B) and a content (c) of the silica (C) of 30 to 80 parts by mass per 100 parts by mass of the rubber component (A), and has (b)/(c) of (60 to 85)/(40 to 15).

Abstract: A pneumatic tire has a carcass layer, a side wall rubber which forms an outer surface of a side wall portion, and a rim strip rubber which forms an outer surface of a bead portion. The rim strip rubber extends in a tire radial direction between the carcass layer and the side wall rubber. A height of the rim strip rubber on the basis of an outer diameter position of a bead core buries in the bead portion is equal to or more than 70% of a height of a tire outer diameter position. A thickness Tw of the rim strip rubber at the tire maximum width position is smaller than the maximum thickness Tm of the rim strip rubber which is closer to an outer side in the tire radial direction than the tire maximum width position.

Abstract: A run-flat tire includes a carcass, a tire side portion and a side reinforcement layer. The carcass bridges between a pair of bead portions. The tire side portion links between a bead portion and a tread portion. A carcass maximum width position of the tire side portion, at which the width of the carcass is at a maximum, is provided at the tire radial direction outer side relative to a position that is at 40% of the tire section height. The side reinforcement layer is provided at the tire width direction inner side of the carcass. A thickness of the side reinforcement layer at the position that is at 40% of the tire section height is not more than 65% of a thickness of the side reinforcement layer at the carcass maximum width position.

Abstract: A pneumatic tire includes a reinforcing rubber layer disposed in the sidewall portions, the reinforcing rubber layer having a crescent-like meridian cross-section. When the tire is assembled on a regular rim and in an unloaded state with an internal pressure of 0 kPa, a radius of curvature (RP) is smaller than a radius of curvature (RO), an arc of the radius of curvature (RP) joining an intersection (Pa) of a carcass layer and a straight line (La), an intersection (Pb) of the carcass layer and a straight line (Lb), and an intersection (Pc) of the carcass layer and a straight line (Lc), and an arc of the radius of curvature (RO) joining an intersection (Oa) of the straight line (La) and a tire external contour, an intersection (Ob) of the straight line (Lb) and the tire external contour, and an intersection (Oc) of the straight line (Lc) and the tire external contour.

Abstract: A tire includes: bead cores; a carcass; a bead filler that extends along an outer face of the carcass from the bead core toward a tire radial direction outer side; and side reinforcing rubber that is provided at a tire side portion, that extends in the tire radial direction along an inner face of the carcass, that decreases in thickness on progression toward the bead core side and toward a tread portion side, that has an end portion at the bead core side that overlaps with bead filler with the carcass sandwiched therebetween, and that has an elongation at break of 130% or above, wherein a thickness of the side reinforcing rubber at a midpoint between an end portion at the tire radial direction outer side of the bead filler running along the carcass, and the end portion is 40% to 80% of a maximum thickness.

Abstract: In a tire 2, a contour of an outer surface of the second apex 38 includes: a circular arc C2 that extends inward from an outer end, in the radial direction, of the contour and is convex outward in the axial direction; and a circular arc C3 that is located inward of the circular arc C2 in the radial direction, is in contact with the circular arc C2, and is convex inward in the axial direction. A difference (Ht?Hw/2) between a height Ht from a bead base line to a contact point between the circular arc C2 and the circular arc C3 and a height that is half of a height Hw from the bead base line to a maximum width position is equal to or greater than ?10 mm and equal to or less than 10 mm.

Abstract: A run flat tire is provided having a line L1 connecting point P1 having height H1 of 17 mm; and point P2 at which a thickness from point P1 is minimum thickness Ts. Point C represents a point which is distant from point P2 on line L1 by a distance that is 0.4 times Ts. A point B represents a point of intersection of: line L2 that extends in the axial direction through radially outer end of core 36; and line L3 that extends in the radial direction through an axially outer end of core side portion 46a of turned-up portion 46. A line L4 passes through point C and point B. The thickness Ts is greater than or equal to 10 mm, and not greater than 17 mm. The turned-up portion 46 extends through a region surrounded by an axially outer surface of main portion 44, and lines L2-L4.

Abstract: A run flat tire having a side reinforcing rubber part is disclosed. The side reinforcing rubber part is formed by a rubber composition having a ratio (M50H/M50N) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100° C. to tensile stress (M50N) in 50% elongation at a measurement temperature of 23° C. of from 1.0 to 1.3. Ratio (tb10/tp10) of 10% vulcanization time (tb10) at a vulcanization temperature of 160° C. of a rubber composition for a bead filler to 10% vulcanization time (tp10) at a vulcanization temperature of 160° C. of a rubber composition for a covering rubber of a carcass ply is from 0.5 to 1.0.

Abstract: A rubber composition includes an elastomer having an elongation at break (Eb) of about 50% or more according to ASTM-D 412 at 25° C., a water-insoluble keratin, and a reinforcing filler. A tire component including the composition and a method for making the composition are also disclosed.

Abstract: A run flat tire having a side reinforcing rubber part is disclosed. The side reinforcing rubber part is formed by a rubber composition having a ratio (M50H/M50N) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100° C. to tensile stress (M50N) in 50% elongation at a measurement temperature of 23° C. of from 1.0 to 1.3. A cushion rubber layer interposed between the side reinforcing rubber part and a bead filler is provided, and tensile stress in 50% elongation at a measurement temperature of 23° C. of a rubber composition forming the cushion rubber layer is larger than tensile stress in 50% elongation at a measurement temperature of 23° C. of the rubber composition forming the side reinforcing rubber part, and is smaller than tensile stress in 50% elongation at a measurement temperature of 23° C. of a rubber composition forming the bead filler.

Abstract: Provided is a filler connection part inspection method by which the connection state of both end surfaces of a belt-shaped filler that has been affixed annularly along the outer periphery of a bead core is inspected. The filler connection part inspection method includes a step of obtaining data of the distance between optical sensors and side surfaces of the filler by scanning, at the side surfaces of the filler, sections of the vicinity of the both end surfaces along the tangential direction of the filler over a predetermined scanning range with the optical sensors, a step of repeating the data obtaining step while the positions of the optical sensors are changed along the radial direction of the filler, and a step of comparing the obtained data with reference data that is set in advance.

Abstract: The invention relates to a tire having a rubber tread of a circumferentially zoned tread. The tread zones are comprised of three circumferential load bearing zones, with each zone containing a portion of the running surface of the tread, comprised of a silica-rich intermedial rubber zone positioned between and extending beneath two carbon black-rich lateral tread zones. The tread configuration contains an underlying carbon black-rich base rubber layer. The intermedial and stratified lateral zones are comprised of rubber compositions having differentiated rebound physical properties. A path of least electrical resistance extends from a lateral carbon black-rich rubber tread zone to the carbon black-rich tread base layer by an extension of a lateral tread zone or by an intermediate carbon black-rich rubber bridge.

Abstract: [Object] To provide a pneumatic tire 82 which is excellent in durability. [Solution] A tire 2 includes a tread 4, wings 6, sidewalls 8, clinch portions 10, beads 12, a carcass 14, support layers 16, a belt 18, a band 20, an inner liner 22, and chafers 24. Dimples 62 are formed on the sidewall 8 that is at an inner side in a width direction of a vehicle when the tire is mounted on the vehicle. No dimples 62 are formed on the sidewall 8 that is at an outer side in the width direction of the vehicle when the tire is mounted on the vehicle. The ratio (Ha/Hb) of a height Ha at an outer end 52, in a radial direction, of the bead 12 from a base line BL relative to a height Hb at a maximum width position Pmax from the base line is equal to or greater than 0.80 but equal to or less than 1.10.

Abstract: The present invention relates to a run-flat tire employing a rubber composition capable of improving processability without reducing the durability during run-flat traveling. More specifically, the present invention relates to a run-flat tire comprising a bead filler 7 and a pair of side-reinforcing rubber layers 8. At least one of the bead filler 7 and the side-reinforcing rubber layer 8 employs a rubber composition obtained by adding 3 to 10 parts by mass of sulfur and 0.1 to 30 parts by mass of a low-molecular-weight conjugated diene-based polymer (B) having a weight average molecular weight in the range of 2,000 to 10,000, to 100 parts by mass of a rubber component (A) containing at least a natural rubber or polyisoprene rubber and having a weight average molecular weight in the range of 150,000 to 2,000,000.

Abstract: [Object] To provide a pneumatic tire 2 which is lightweight and is excellent in durability. [Solution] A tire 2 has a large number of dimples 62 on sidewalls 8 thereof. These dimples 62 are arranged along a circumferential direction. The contour of each dimple 62 is, for example, a rectangle. In each dimple 62, the length in a circumferential direction is larger than the length in a radial direction. The area occupation ratio of each dimple 62 is equal to or greater than 75% but equal to or less than 93%. The contour of each dimple is symmetrical about a straight line extending in the radial direction. Preferably, the depth of each dimple 62 is equal to or greater than 0.5 mm but equal to or less than 4.0 mm. The width of a land between each dimple 62 and another dimple 62 adjacent to this dimple 62 is preferably equal to or greater than 0.3 mm but equal to or less than 3.0 mm.

Abstract: The pneumatic tire 1 satisfies both SW?175 mm and OD/SW?3.6, where SW is the width of the pneumatic tire 1 and OD is the outer diameter of the pneumatic tire 1. Moreover, the pneumatic tire 1 satisfies both SW?175 mm and OD/RD?1.4, where SW is the width, OD is the outer diameter, and RD is the inner diameter of the pneumatic tire 1, which is the diameter of a portion of the pneumatic tire 1 (an end portion of a bead portion) in contact with a wheel in a state where the pneumatic tire 1 is fitted to the wheel.

Abstract: The pneumatic tire 1 satisfies both SW?175 mm and OD/SW?3.6, where SW is the width of the pneumatic tire 1 and OD is the outer diameter of the pneumatic tire 1. Moreover, the pneumatic tire 1 satisfies both SW?175 mm and OD/RD?1.4, where SW is the width, OD is the outer diameter, and RD is the inner diameter of the pneumatic tire 1, which is the diameter of a portion of the pneumatic tire 1 (an end portion of a bead portion) in contact with a wheel in a state where the pneumatic tire 1 is fitted to the wheel.

Abstract: A non-pneumatic tire and a method of manufacturing the same are provided. More particularly, a non-pneumatic tire having a reinforcement structure with one or more spacers is provided along with a method of placement of a spacer between reinforcing bands of a non-pneumatic tire. A jig can be used to facilitate placement of the spacer.

Abstract: A pneumatic run flat tire includes an inner side reinforcing rubber layer having a falcated cross-section and an outer side reinforcing rubber layer having a center of gravity position in a meridian cross-section that is positioned inward in a tire radial direction of a tire maximum width position disposed in a side wall portion. Volumes of the inner side reinforcing rubber layer and the outer side reinforcing rubber layer are each different on a vehicle inner side and a vehicle outer side when mounted on a vehicle.

Abstract: Particular embodiments include run-flat tires having sidewall supports that are manufactured from a rubber composition that is based upon a tin end-functionalized polybutadiene rubber as well as an additional second rubber component and a mixture of carbon blacks. The first carbon black may be characterized as being a low-surface area, high-structure carbon black and the second carbon black may be characterized as a low-surface area carbon black. The low-surface area, high-structure carbon black may be added to the rubber composition in an amount that provides a modulus of elongation at 10% measured at 23° C. of between 8 MPa and 10 MPa.

Abstract: Run-flat tires having a sidewall support that is manufactured from particular rubber composition. These compositions are based upon a cross-linkable elastomer composition having, per 100 parts by weight of rubber, a polybutadiene rubber having a Mooney viscosity of between 55 and 85 and a low-surface area, high-structure carbon black. An additional second rubber component may also be included in the elastomer composition. The low-surface area, high-structure carbon black may be characterized as having a nitrogen surface area of between 15 m2/g and 25 m2/g and a COAN of between 65 ml/100 g and 85 ml/100 g.

Abstract: In a pneumatic run flat tire in which an inner side reinforcing rubber layer having a falcated cross-section is disposed in a side wall portion, dynamic elastic moduli E?10A, E?10B, and E?10C and values T10A, T10B, and T10C of a tan ? at 60° C. of rubber compositions of each region of the inner side reinforcing rubber layer are configured so as to satisfy the relationships E?10A<E?10B<E?10C, E?10A?4.0 MPa, T10A<T10B<T10C, and T10A?0.06. Dynamic elastic moduli E?20A, E?20B, and E?20C at 60° C. of rubber compositions of each region of the outer side rubber layer are configured so as to satisfy the relationships E?20B<E?20A?E?20C and E?20C/E?20B?1.6. Furthermore, the dynamic elastic modulus ratios E?20A/E?10A and E?20C/E?10C are configured so as to satisfy the relationships 0.6?E?20A/E?10A?1.0 and 0.6?E?20C/E?10C?1.0.

Abstract: A pneumatic tire includes a carcass with a plurality of ply cords braided into an interlaced structure. Each of the ply cords follows a geodesic path from a first sidewall portion across a crown portion to a second sidewall portion. The pneumatic tire also includes a rubber layer encasing the carcass and including a tread adjacent the crown portion. The pneumatic tire does not include any beads because the plurality of carcass plies is folded onto itself at each of the first and second sidewall portions. Thus, the benefits of geodesic plies and braided ply construction are achieved by the pneumatic tire.

Abstract: A pneumatic tire includes a tread, sidewalls extending from edges of the tread, clinches extending from the edges of the sidewall, beads positioned on axially inner side of the clinches, a carcass bridging the beads along inner side of the tread and sidewalls, and load support layers positioned on axially inner side of the carcass such that the layers are positioned between the tread and beads. Each bead includes core and main apex, the core has radially outer side surface facing radially outward, the carcass includes carcass ply turned up around the core from inner side toward outer side in axial direction of the tire such that the main portion and turn-up portion are formed in the ply, the turn-up portion has core laminating portion laminated on the radially outer side surface of the core, and the apex is extending radially outward from radially outer side of the laminating portion.

Abstract: [Object] To provide a pneumatic tire 2 which is excellent in durability. [Solution] The tire 2 has a marking on each sidewall 8 thereof. A large number of dimples 62 are formed in a region between the marking and a rim protector 34. These dimples 62 are arranged along a circumferential direction. These dimples 62 form a row. The row includes: (1) dimples each having a plane shape of a circle; or (2) dimples in each of which a plane shape is substantially a rectangle, and a ratio of a length in the circumferential direction to a width in a radial direction is equal to or greater than 1.0 and equal to or less than 3.0.

Abstract: Provided is a run-flat tire in which a side-reinforcing rubber is arranged on the inside of the carcass in the tire width direction on both sidewall portions. The carcass plies include cords made of a material having a heat shrinkage rate of 2% to 8% at 177° C., and the run-flat tire further includes a reinforcing cord layer which includes cords made of a material having a heat shrinkage rate of less than 2% at 177° C., the reinforcing cord layer being arranged on the outside of the side-reinforcing rubber in the tire width direction on both sidewall portions.

Abstract: A pneumatic radial tire comprising a side reinforcing rubber layer 5 having a crescent shaped cross-section arranged on the inside of a carcass 4 at a side wall portion 2, and a belt reinforcing layer 9 which is formed by spirally winding a strip which is formed by covering a polyester cord with rubber with respect to the tire circumferential direction. The polyester cord taken out from pneumatic radial tire satisfies that the ply twist coefficient ?1 and the cable twist coefficient ?2 represented by the following formulae: ?1=N1×(0.125×D1/?)0.5×10?3 ?2=N2×(0.125×D2/?)0.5×10?3 are 0.1 to 0.4 and 0.1 to 0.45, respectively, and the initial tensile resistance degree is 7 to 20 GPa, and the adhesion level of the polyester cord in a residual adhesion evaluation method after an adhesive agent treatment is 5 N/cord or higher.

Abstract: A run flat tire with reinforced sides, wherein inner and outer rubber thickness ratios centered on a carcass layer in a side wall portion are stipulated and a side filler extending in the tire radial direction is embedded on the outer wall surface side of the side wall portion. In this run flat tire, the modulus of the side filler/modulus of a side reinforcing layer, the modulus of a rim cushion/a modulus of the side filler, the cross-sectional area of a bead filler/cross-sectional area of the side filler, the cross-sectional area of the side filler/cross-sectional area of the side reinforcing layer, the rubber hardness of the side reinforcing layer, and the material of belt cover layers are each stipulated.

Abstract: [Object] To provide a pneumatic tire 82 which is excellent in durability. [Solution] A tire 2 includes a tread 4, wings 6, sidewalls 8, clinch portions 10, beads 12, a carcass 14, support layers 16, a belt 18, a band 20, an inner liner 22, and chafers 24. Dimples 62 are formed on the sidewall 8 that is at an inner side in a width direction of a vehicle when the tire is mounted on the vehicle. No dimples 62 are formed on the sidewall 8 that is at an outer side in the width direction of the vehicle when the tire is mounted on the vehicle. The ratio (Ha/Hb) of a height Ha at an outer end 52, in a radial direction, of the bead 12 from a base line BL relative to a height Hb at a maximum width position Pmax from the base line is equal to or greater than 0.80 but equal to or less than 1.10.

Abstract: Provided is a run-flat tire having a substantially-crescent-shaped cross section, which makes it possible to achieve both durability at the time of run-flat travel and ride comfort at the time of travel at a normal inner pressure. A rigidity reducing portion that reduces a tire rigidity in the width direction extends in the circumferential direction on a surface of a tread rubber in an area located on the inner side than an end of a belt in the tire width direction and on the outer side than a road-contacting end in the tire width direction under a 75% load state.

Abstract: A run flat tire is provided on the inside of the carcass in the sidewall portion with a crescent-shaped reinforcing rubber having an axially outside part and an axially inside part each composed of a number of spiral windings of a narrow-width rubber strip. In the inside rubber part, spiral pitches P1 of the rubber strip forming the axially outer surface layer are larger than spiral pitches for the layer abutting on the inside thereof. In the outside rubber part, spiral pitch P2 of the rubber strip forming the axially inner surface layer are larger than spiral pitches for the layer abutting on the outside thereof.

Abstract: [Object] To provide a pneumatic tire 2 for which processing of a mold is easy and which is excellent in durability. [Solution] A tire 2 has a large number of dimples 62 on sidewalls 8 thereof. These dimples 62 are divided into dimples 62 of a first row I and dimples 62 of a second row II. The number of the dimples 62 per one row is 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25, 30, 32, 36, 40, 48, 5060, 72, 75, 80, 90, 100, 120, 144, 150, 160, 180, 200, 225, 240, 300, 360, 375, 400, 450, 480, 500, 600, or 720. Preferably, the number of the dimples 62 of the second row II is equal to the number of the dimples 62 of the first row I.

Abstract: A run-flat tire includes a carcass including at least one carcass ply, a belt layer, a pair of side reinforcing rubber layers, a pair of bead apex rubber components. A height of the one bead apex rubber component is greater than a height of the other bead apex rubber component. An inner end height of the one side reinforcing rubber layer is greater than an inner end height of the other side reinforcing rubber layer. In a radial region of the tire where at least the bead apex rubber components and the side reinforcing rubber layers are provided, the tire has a same thickness in the respective sides of the bead portions.

Abstract: A run-flat tire is provided with a reinforcing cord layer adjoining the radial carcass at least from the belt end to the maximum width portion of the tire side portion; the cord constituting the reinforcing cord layer is nylon 66 cord, cellulose fiber cord, PET cord, PEN cord or aramid/nylon 66 hybrid cord, and has a cord angle of less than 10° with respect to the tire radius direction; and the elastic modulus of the cord pulled out from the tire at a temperature of 25° C. under the conditions of a load of 3 N is not higher than 40 cN/dtex, and the thermal shrinkage stress ? (cN/dtex) at a temperature of 177° C. and the elastic modulus E (cN/dtex) at a temperature of 177° C. under the conditions of a load of 10 N satisfy the following conditions: ?+0.025E?0.36, 40?E?8, and ??0.05.

Abstract: A run-flat tire (11) comprising a crown comprising a crown reinforcement (21, 22) surmounted by a tread (30); two sidewalls (40) extending the crown radially inward; two beads (50) radially inward to the sidewalls and each comprising an annular reinforcing structure (60); at least one carcass reinforcement (71, 72) anchored in each of the beads and extending from the beads through the sidewalls toward the crown; and at least one sidewall insert (80) axially on the inside of the carcass reinforcement, comprising at least one polymer compound; wherein at least one sidewall of the tire further comprises: at least one additional sidewall reinforcement (90) comprising reinforcing elements, positioned axially on the outside of the carcass reinforcement, the radially inside end (91) of the additional sidewall reinforcement being, in any radial section, radially on the inside of the axial straight line (100) that passes through those points in the sidewalls at which the carcass reinforcement has its greatest axial wi

Abstract: A nm-fiat tire 1 comprises a carcass 6, a pair of side reinforcing rubber layers 9, and a pair of sidewall rubber components 10. At a tire maximum-width position, a first side reinforcing rubber layer 9A disposed in the side of a first bead portion has a thickness B1 greater than a thickness B2 of a second side reinforcing rubber layer disposed in the side of a second bead portion, and a first sidewall rubber component disposed in the side of the first bead portion has a thickness A1 smaller than a thickness A2 of a second sidewall rubber component disposed in the side of the second bead portion.

Abstract: A run flat tire which comprises a ply layer (4) disposed extending toroidally between a pair of bead cores and comprising ply coating rubber and ply cords, an inner liner layer (5) disposed circumferentially at an inner side of the ply layer, side reinforcing rubber layers (6) having an approximately crescent-shaped cross section and disposed in side portions of the tire between the ply layer and the inner liner layer and rubber sheets (7) disposed extending at interface of the ply layer and the side reinforcing rubber layer, wherein relations of t90>tp10 and t10<ts90 are satisfied when characteristic values of vulcanization obtained in accordance with JIS K6300-2 are represented by tp10 and tp90 for the ply coating rubber, ts10, and ts90 for the side reinforcing rubber and t10 and t90 for the rubber for a sheet.

Abstract: A pneumatic radial ply tire includes a pair of beads, a single carcass ply, a tread, and a pair of sidewalls. The pair of beads each has an associated chaffer. The single carcass ply is folded about each bead so as to define a main body portion and a turnup portion associated with each bead. The tread is disposed radially outward from the single carcass ply. The tread has shoulder portions disposed at axial outer edges of the tread. The pair of sidewalls extends radially outward from each chaffer to a location adjacent each shoulder portion. Each sidewall is disposed axially outward of the single carcass ply. Each sidewall includes a first outer layer extending from the chaffer to the shoulder portion and a second inner layer extending from the chaffer to the shoulder portion. The second inner layer is disposed entirely between the single carcass ply and first outer layer. The second inner layer comprises a foamed structure of a rubber composition having a density ranging from 0.1 to 1.0 g/cm3.

Abstract: A runflat tire includes a tire body, a carcass extending from a tread portion through sidewall portions of the tire body to bead cores in bead portions of the tire body, and sidewall-reinforcing rubber layers having cross-sectional crescent shapes and positioned on inner sides of the carcass along the sidewall portions, respectively. The tire body has height Ha in range of 8˜17 mm where the height Ha is measured from a rim line of the tire body to inner edge of an innermost dimple/fin row of the tire body in radial direction of the tire body, the innermost row is formed in dimple/fin forming region including one or more dimple/fin rows having dimple/fin portions arrayed in circumferential direction of the tire body, and the dimple/fin forming region is formed on external surface of a sidewall portion on outer side of the rim line in the radial direction.

Abstract: A run-flat tire with an aspect ratio of 50% to 60%, which comprises a carcass consisting of a single ply of cords extending between bead cores through a tread portion and sidewall portions, a pair of sidewall reinforcing layers each with a crescent cross-sectional shape and disposed axially inwardly of the carcass in each sidewall portion, the sidewall reinforcing layers made of rubber having a complex elastic modulus of from 6 to 12 MPa, and a pair of bead apex elements which extending radially outwardly of the tire from bead cores, each bead apex element having a height of from 0.30 to 0.48 times a tire section height from a bead base-line, wherein the tire has certain relations with respect to thicknesses of sidewall reinforcing layers and sidewall rubber elements.

Abstract: A side wall reinforced run flat tire, wherein a second carcass layer that does not reach a bead core is disposed along the outer peripheral surface of a carcass layer. A position of an outer peripheral edge of a bead filler, a relationship between a rubber thickness Gc of the inner side and a rubber thickness Ga of an outer side taken on the line X normal to the rim line and centered on the carcass layer, a relationship between the rubber thicknesses Ga and Gb of the side wall rubber in an upper region of a bead portion, and a position of a folded up end of the carcass layer are each stipulated.

Abstract: A rubber composition for a sidewall reinforcing layer and a run-flat tire reduces heat build-up, enhances elongation at break at high temperature, and increases run-flat durability, while maintaining good rigidity. The composition contains a rubber component including tin-modified BR (a) and/or BR (b) modified by a compound of formula (1) wherein R1, R2, and R3 may be the same as or different from one another and each represent an alkyl group, an alkoxy group, a silyloxy group, an acetal group, a carboxyl group, a mercapto group, or a derivative thereof; R4 and R5 may be the same as or different from each other and each represent a hydrogen atom or an alkyl group; and n denotes an integer; and an alkylphenol-sulfur chloride condensate, wherein an amount of the alkylphenol-sulfur chloride condensate is 3-10 parts by mass per 100 parts by mass of the rubber component.

Abstract: A pneumatic tire provided with run-flat reinforcing layers 10 in left and right sidewall portions 2 that enable run-flat traveling. A tread reinforcing layer 12 formed from a thermoplastic resin or a thermoplastic elastomer composition including a blend of a thermoplastic resin component and an elastomer component is provided on an inner side of a tread portion 1.