Abstract: A pneumatic tire has a tread, a carcass with belt plies disposed below the tread, and a cap ply layer between the tread and the belt plies of the carcass. The cap ply is a leno weave tape having warp yarn in the longitudinal direction and weft yarns in the weft direction. The leno weave tape is wound in a flat helically wound around the belt plies, and cover with a tread of the tire.

Abstract: A pneumatic tire having a belt structure includes: a first belt layer; a second belt layer in a radially inner position with respect to the first belt layer, a third belt layer in a radially inner position with respect to the first and second belt layers, each belt layer including a plurality of elongated reinforcing elements disposed at a first, second and third belt angle respectively. The first and second belt angles have an absolute value of 15 to 40 degrees; the second angle is of opposite sign with respect to the first belt angle; and the third belt angle has an absolute value of 40 to 90 degrees and is of opposite sign with respect to the second belt angle. The belt structure also includes a zero degree belt layer placed in a radially outer position with repeat to the first belt layer including elongated reinforcing elements arranged such as to form a belt angle which is substantially zero.

Abstract: A tire (2) includes a belt (12) provided on a carcass (10) and a band (14) for covering the belt (12). The band (14) includes a full band (36) and a pair of edge bands (38) provided in the vicinity of a shoulder and positioned on an outside in a radial direction of the full band (36). The full band (36) has a first band cord (40) wound spirally in a substantially circumferential direction. The edge band (38) has a second band cord (44) wound spirally in the substantially circumferential direction. A modulus of the second band cord (44) is higher than that of the first band cord (40). In the tire (2), it is preferable that an outer end (50) of the full band (36) should be provided on an outside of an outer end (48) of the belt (12) in an axial direction. An outer end (52) of the edge band (38) is identical to the outer end (48) of the belt (12) or is provided on an inside thereof.

Abstract: This invention relates to a pneumatic radial tire being excellent in steering stabilities during low-speed running and high-speed running, and more particularly to a pneumatic radial tire comprising at least one belt reinforcing layer 6A, 6B disposed on a belt 5 outward in a radial direction of the tire, characterized in that a reinforcing element constituting the belt reinforcing layer 6A, 6B is a polyketone fiber cord satisfying conditions of the following equations (I) and (II): ???0.01×E+1.2??(I) ???0.02??(II) [wherein ? is a thermal shrinkage stress (cN/dtex) at 177° C.; and E is an elastic modulus (cN/dtex) at 25° C. under a load of 49 N].

Abstract: A pneumatic tire having at least two belt plies provided radially outwardly of a carcass ply in the tread. A belt cover ply is disposed radially outwardly of the at least two belt plies. The belt cover ply has reinforcing cords that extend in the circumferential direction of the tire and is covered with coating rubber. The belt cover ply extends beyond the edges of one of the at least two belt plies having a maximum belt width to have extension portions that extend at least 10 mm axially of the tire therefrom. The coating rubber of at least the extension portions of the belt cover ply is formed of rubber having a tan delta at a temperature of 60.degree. C. that is equal to or less than 0.1, and the ratio h/SH of a tire radial-direction length h between the edges of the extension portions and the edges of the belt ply having the maximum belt width to the tire section height SH is equal to or less than 1.5/100.

Abstract: There is provided a pneumatic radial tire for a motorcycle whose turning stability is improved by achieving both grounding performance and lateral rigidity at high level. A mono-spiral belt (MSB) (3) includes steel cords whose tensile break strength is 5.9 Pa or more. A value Tc of a number of driven cords in the MSB (per 25 mm in width) at an equator of the tire and a value Ts at shoulder parts thereof meet requirements of 17?Tc?24 and 0.6?Ts/Tc?0.9. A disposed width BW of the MSB meets a requirement of 0.6?BW/TW?1.0. At least one textile-reinforcing layer having tensile break strength of 5.9 Pa or more is disposed at both ends of the MSB while overlapping with the MSB. An overlap of the MSB with the textile-reinforcing layer is 4 to 10 times of the diameter D of the steel cords in the MSB.

Abstract: A pneumatic tire having a carcass and a belt reinforcing structure wherein the belt reinforcing structure is a composite belt structure having at least one pair of radially outer zigzag layers and at least one spirally wound belt layer with cords inclined at an inclination of 5 degrees or less relative to the tire's centerplane and located radially inward of and adjacent to the at least two radially outer belt layers. The at least two radially outer zigzag belt layers have cords inclined at 5 degrees to 30 degrees relative to the tire's centerplane and extending in alternation to turnaround points at each lateral edge of the belt layer. At each turnaround point the cords are folded or preferably bent to change direction across the crown of the carcass thus forming a zigzag cord path.

Abstract: In a pneumatic tire, a belt layer includes six superposed belt members. The edge of the fourth belt member on the tire-width direction outer side and the edge of the sixth belt member on the tire-width direction outer side are at approximately the same position in a tire width direction.

Abstract: There is provided a tire for an aircraft capable of enhancing abrasion resistance and effectively preventing a progress of peeling of the non-extensible cords of the main belt layers even when the tire suffers external injury reaching the main belt layers.

Abstract: The present invention aims to provide a pneumatic tire for a motorcycle further improving driving stability especially in turning. A pneumatic tire 10 for a motorcycle comprises a pair of right and left bead portions 12 and a carcass layer 14 toroidally extending from the bead portions 12. In addition, the pneumatic tire 10 for a motorcycle comprises a spiral belt layer 20 on the radially inner side of a crown portion 14C of the carcass layer 14. This spiral belt layer 20 is formed by spirally winding a strip-shaped rubber-coated cord layer 21 consisting of a single cord or a plurality of parallel cords embedded in coating rubber in such a manner that a cord angle is within a range between 0 degree and 5 degrees with respect to a tire circumferential direction. This spiral belt layer 20 lies only in areas from a tire center CL to positions away from the tire center CL by 0.65L to 0.85L where L is a tread surface distance from the tire center CL to a tread edge T.

Abstract: A tire for two-wheeled motorcycles of the present invention includes a first carcass layer folded back along circumferential surfaces of bead cores, a second carcass layer folded back along circumferential surfaces of turnbacks of the first carcass layer 5, a belt layer wound spirally along a tire circumferential direction and an intermediate carcass layer provided between the first and second carcass layers 7 and in an inner circumferential side of the belt layer and extending close to a tire maximum width. According to the present invention, reduction of shear stiffness is restrained and thereby driveability and stability, especially handling response, can be improved.

Abstract: A pneumatic radial aircraft tire is described having a B/A ranging between 60-70%, wherein B is the width of the tire between the wheel flange, and A is the inflated tire width under rated pressure. The tire may further optionally include a tire bead portion having a Ra/Fr1 relationship which ranges from about 1 to about 2.1, wherein: Ra is the tire heel radius at uninflated and in an new and unused condition, and Fr1 is the wheel flange elliptical radius at the heel section of the tire. The tire may further optionally include a SW/TS ratio which ranges from about 0.1 to about 0.5, wherein SW is the chafer gauge at area A, TS is the total sidewall rubber gauge at area A, wherein A is defined as the region in the sidewall that has a lower radial endpoint defined by the point of contact between the flange and the tire at inflated, unloaded condition, and an upper radial endpoint Ah defined by the tire wheel flange point of contact when the tire is at inflated, and at 100% rated load.

Abstract: A tire 2 has a belt 14 and a hard rubber layer 16. The belt 14 has a first ply 26, a second ply 28, a third ply 30 and a fourth ply 32. A width W3 of the third ply 30 is smaller than a width W1 of the first ply 26 and a width W2 of the second ply 28, and 75% of a width of a tread. Each of the plies 26, 28, 30, 32 has a steel cord. The first ply 26 and the second ply 28 construct a cross-ply structure. A cord of the third ply 30 is wound spirally. The third ply 30 has what is referred to as a jointless structure. The hard rubber layer 16 is positioned between the first ply 26 and the second ply 28, and outward of the third ply 30 in an axial direction. A complex elastic modulus of the hard rubber layer 16 is equal to or greater than 30 MPa.

Abstract: A flat tire (2) according to the present invention includes a load support layer (12) positioned on an inside in an axial direction of a sidewall (6). The tire (2) further includes a belt (14) constituted by an inner belt ply (40) and an outer belt ply (42), and a full band (16) substantially covering a whole surface on an outside in a radial direction of the belt (14). The full band (16) is formed by a cord and a topping rubber. When a tensile load of 50N is applied, the cord has an elongation of 3.0% or less. The tire (2) may include a center band which has a smaller width in the axial direction than the width of the full band (16) and is laminated on the full band (16) in the vicinity of an equator (CL).

Abstract: In the pneumatic radial tire of the present invention, a total strength K0 of a belt layer 20 in a circumferential direction of the tire per unit of width at a tire equator surface position P0 is set greater than a total strength of the belt layer 20 in the circumferential direction of the tire per unit of width at a width position P2 corresponding to ? of a maximum width of the belt layer having the tire equator surface CL as a center.

Abstract: Problem: To provide a pneumatic tire, wherein the performance of the tire (in terms of resistance to uneven wear) can be improved. Resolution Means: In a pneumatic tire 1, a distance t from an equatorial plane CL of a tire to outer circumferential main grooves 52 and a distance b from the equatorial plane CL of the tire to an edge of a belt edge cushion 35 in the width direction of the tire satisfy 0.85?t/b?0.90, in a cross-section in a meridian direction of the tire. Moreover, a distance d, which is half the width of a belt ply 33 having the largest width, and a distance u from the equatorial plane of the tire to narrow grooves, satisfy 0.97?d/u?1.03. Furthermore, a distance a, which is half the width of a belt ply in the outermost layer, and a distance t, of outer circumferential main grooves, satisfy 1.15?a/t?1.25.

Abstract: The present invention provides a belt formed of a spirally wound strip member constituted of a few juxtaposed cords and rubber coating thereon, with a structure which can absorb influence of difference in winding diameter at the unit width portion of the strip member without deteriorating productivity of the tire.

Abstract: The present invention provides a pneumatic tire for a motorcycle, which tire is capable of improving both stability in running straight at a relatively high speed and gripping properties in cornering at the same time. The pneumatic tire for a motorcycle, comprises: a dual layered slant belt 16L, 16U constituted of two cord-crossing layers in which cords of respective layers cross each other, the slant belt being disposed on the outer side in the tire radial direction of a carcass 14; an outermost belt layer 20 of which a cord angle with respect to the tire equatorial plane is no smaller than 70 degrees; and a “0 degree” belt 18 provided between the outermost belt layer 20 and the dual layered slant belt and having cords extending substantially in the tire circumferential direction.

Abstract: A motorcycle tire includes at least one carcass-type reinforcement structure formed of reinforcement elements, anchored on either side of the tire to a bead whose base is intended to be mounted on a rim seat, each bead being extended radially towards the outside by a sidewall. The sidewalls meet up radially towards the outside with a tread. Under the tread there is a crown reinforcement structure including at least one layer of reinforcement elements known as a working layer which has at least one continuous reinforcement cord forming portions in the central zone thereof. Those central cord portions display identical angles of between 10-80 degrees formed with the longitudinal direction, the angles being measured at points of intersection of the cord with a circumferential plane. Two adjacent cord portions are linked by a U-shaped loop.

Abstract: A pneumatic tire for a two-wheeled vehicle has further increased driving stability, particularly in turning. Pneumatic tire 10 for a two-wheeled vehicle has belt layer 16 and tread section 18 that are sequentially arranged on the outer side, in the radial direction of the tire, of a crown section 14C of a carcass 14. On the belt layer 16 is placed a spiral belt layer 20 formed by spirally winding a band-like rubber coated cord layer so as to form a cord angle in the range of 0° to 5° relative to the circumferential direction of the tire. With L the tread surface distance from tire center CL to tread edge T, spiral belt layer 20 is present only in the range of 0.65 L to 0.85 L from tire center CL, and intersecting belt layers 22A-22D are arranged in the range of from an edge in the lateral direction of the spiral belt layer 20 to tread edge T.

Abstract: Provided is a pneumatic radial tire: that includes a circumferential-direction reinforcement layer having a width increased with fatigue break of the circumferential-direction reinforcement layer being suppressed at edge portions thereof; and that suppresses separation in each of cross belt layers at edge portions thereof. A pneumatic radial tire according to the present invention is a pneumatic tire including: at least two cross belt layers disposed on an outer circumferential side of a carcass layer in a tread portion; and at least one circumferential-direction reinforcement layer disposed between these cross belt layers, a width of the circumferential-direction reinforcement layer being smaller than that of each cross belt layer.

Abstract: A two-piece tire assembly 10 with a removable tread belt 12 for installing about the circumference of a tire carcass 14 is provided. The two-piece tire assembly 10 includes a tread belt 12 has a belt structure 90 having two or more belt layers 100, 110, 120, 130 each layer having one or more belts, wherein the belts in each layer 100, 110, 120 and 130 when viewed in a cross section have a non-linear, preferably curved profile with a radius of curvature R. The tread belt 12 includes one belt layer 110 having 0 degree cord angles relative to an equatorial plane (EP) of the tread belt 12 and two belt layers 100, 120 having cords of opposite cord angles greater than 20 degrees, preferably in the range of 20 to 45 degrees. An optional fourth top belt layer 130 has cords oriented transverse or 90 degrees to the equatorial plane EP.

Abstract: The present invention provides a tire with a belt having relatively high durability by improving fatigue resistance of cords at end portions of a circumferential belt layer, in particular, and especially proposes a radial tire for heavy load, having a relatively small aspect ratio.

Abstract: A pneumatic tire has a tread, a carcass with belt plies disposed below the tread, and a cap ply layer between the tread and the belt plies of the carcass. The cap ply is a weft inserted warp knit fabric tape comprising an in-lay warp yarn set, a weft inserted yarn set, and a stitching yarn set, wherein the stitching yarn set forms a repeating stitch pattern on each warp yarn comprising a sequence of at least 2 stitches around the warp yarn from one stitching yarn and at least 2 stitches around the warp yarn from the adjacent stitching yarn. The tape is wound in a flat helically wound around the belt plies and covered with a tread of the tire.

Abstract: A tire/wheel assembly body enables reduction of road noise while reducing unsprung mass using a light-metal wheel. The tire/wheel assembly body is formed by installing a pneumatic tire on the light-metal wheel with a rigidity index (?) of 35 to 65 (1/rad). In the pneumatic tire, reinforcement layers are arranged at end portions of a belt layer.

Abstract: This invention relates to a pneumatic radial tire having low road noise and flat spot and a high high-speed durability, and more particularly to a pneumatic radial tire comprising a radial carcass (5), a belt (6) disposed outside a crown portion of the carcass in a radial direction and comprised of at least two belt layers, and a belt reinforcing layer (7A, 7B) disposed outside the belt in the radial direction, characterized in that the belt reinforcing layer 7A, 7B is formed by continuously and spirally winding a polyethylene terephthalate cord(s) in a circumferential direction of the tire, and this cord has an elastic modulus of not less than 2.5 mN/dtex·% under a load of 29.4 N measured at 160° C.

Abstract: A flat heavy-duty pneumatic radial tire having a 0-degree belt layer formed of steel cords and increased in durability, wherein multiple plies of steel cord belt layers (6) are disposed on the outer periphery of a carcass layer (4). The steel cord belt layers (6) includes at least one ply of the 0-degree belt layer with a cord angle of substantially 0° relative to the circumferential direction of the tire and at least two plies of bias belt layers (8) with a cord angle substantially equal to an equilibrium angle of within a range of 45° to 65° relative to the circumferential direction of the tire. The tire is manufactured as follows. The tire cured and molded in a mold is released from the mold, assembled with a rim to be inflated while the tire is hot, and then cooled to normal temperature under the inflated condition.

Abstract: A heavy duty radial tire comprises a belt layer having first and third plies of cords arranged at an angle of 10 to 45° relative to the tire equator, and a second ply of cords arranged at an angle of at most 5° relative to the tire equator, the widths W1 and W3 of the first and third plies are at least 85% of a ground contact width Tw and the width W2 of the second ply is at least 70% of the width Tw and is smaller than the widths W1 and W3; and a pair of reinforcing rubber layers disposed between the first and third plies so as to extend axially outwardly from the axially outer ends of the second ply comprising an axially inner portion having E*1 of 8.0 to 14.0 MPa, and an axially outer portion having E*2 of 6.0 to 12.0 MPa smaller than E*1.

Abstract: The durability is improved by using as a carcass ply cord or a belt cord of a tire a cord formed by twisting plural steel filaments having a tensile strength of not less than 2700 N/mm2, and a total elongation at break of the cord of 3.0-7.0% without sacrificing the excellent ride comfort.

Abstract: A pneumatic tire to effectively enhance the transversal stiffness and prevented the carcass from breaking before the other reinforcement members break is provided. A tread rubber is arranged radially outwardly on the crown portion of the carcass. A belt consisting of at least one belt layer is arranged between the tread rubber and the carcass. The belt layer containing cords extending in a direction inclined from the tire's circumferential direction. At least one circumferential reinforcement layer containing meandering cords extending generally along the tire's circumferential direction in a wavy or zigzag shape is provided radially outwardly or inwardly on the belt or between the belt layers. At least one transversal reinforcement layer containing straight cords extending generally perpendicular to the tire's circumferential direction is provided on the position radially outwardly adjacent to the crown portion of the carcass.

Abstract: A tire comprising at least one reinforcement structure of carcass type anchored on either side of the tire in a bead, the base of which is intended to be mounted on a rim seat, each bead being extended radially outward by a sidewall, the sidewalls extending radially towards outward to join a tread, the reinforcement structure extending circumferentially from the bead towards said sidewall, an anchoring zone for the reinforcement structure, said tire furthermore comprising an anti-vibration means arranged circumferentially in the junction zone of the shoulder and the sidewall.

Abstract: A tire for a vehicle wheel includes at least one metallic reinforcing cord comprising a single strand of elementary filaments preformed by sinusoidal waving and wound together. The number of filaments is greater than or equal to 3 and less than or equal to 8. A diameter of each filament is greater than or equal to 0.12 mm and less than or equal to 0.35 mm. A linear density of the at least one reinforcing cord is greater than or equal to 0.18 g/m and less than or equal to 4.0 g/m. A value of a breaking-stress integral of the at least one reinforcing cord is greater than or equal to 5,000 J/m3. In a two-wheeled vehicle, the at least one reinforcing cord in a tire for front-mounting may be distributed with a variable density while, in a tire for rear-mounting, the density may be constant.

Abstract: A pneumatic tire is provided which enables durability thereof to be improved by preventing oxidation degradation of belt layers. In the pneumatic tire, a carcass layer is laid between a pair of bead portions so that the carcass layer links the bead portions, an air penetration preventing layer is disposed on the inner surface of the tire along the carcass layer, and belt layers are buried in a tread portion at the side of the outer periphery of the carcass layer. In the pneumatic tire, a cord layer, which is formed by repeatedly winding a cord in the tire circumferential direction, is disposed between the carcass layer and the belt layers, and at least one portion of the cord layer is made close to the outer surface of the tire so that a distance between the cord and the outer surface of the tire is not longer than 2 mm.

Abstract: The invention relates to a tire having a radial carcass reinforcement comprising a crown reinforcement formed of at least two working crown layers of inextensible reinforcement elements, which are crossed from one ply to the other, forming angles of between 10° and 45° with the circumferential direction, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls and the axially widest working crown layer being radially internal to the other working crown layers.

Abstract: A radial tire for a motorcycle capable of having high road grip performance both when running at a high speed on a dry road surface and when cornering at a high s]peed, together with the high speed durability, especially a radial tire for a motorcycle with a large displacement to be used for road races, capable of maintaining these performances until the end of the races, is provided. The tilting angles of the cords 13a of said cross-belt 13 are set to 60 degrees or more to the circumferential direction, and a belt protecting layer 15 is disposed outside the spiral-belt 14, the belt protecting layer 15 having cords arranged in the direction tilted at 70 degrees or more to the circumferential direction.

Abstract: A medium truck tire (10) and more specifically a super single truck tire (10) includes belt plies (23, 24, 25) reinforced with steel cords which make an angle comprised between 0° and 5° with respect to the equatorial plane. Disposed radially outermost over the belt plies (23, 24, 25) is at least one substantially full spiral helically wound layer (22). The steel of the reinforcing cords comprises high elongation steel. The spliced belt plies (23, 24, 25) are in a RLL configuration making angles comprised between 45° and 75° with respect to the equatorial plane angular direction of the inwardmost ply (25) oppositely disposed relative to the outer plies (23, 24). The helically would layer(s) (22) are disposed over the outermost L ply (23) and have a width substantially 100% of the footprint width of the tire tread.

Abstract: A medium truck tire (10) and more specifically a super single truck tire (10) includes belt plies (22, 23, 25) reinforced with steel cords which make an angle comprised between 0° and 5° with respect to the equatorial plane. Disposed between in embedded fashion between two of the belt plies (23, 25) is a pair of substantially full spiral helically wound overlays (24). The steel of the reinforcing cords comprises high elongation steel. The spliced belt plies (22, 23, 25) are in a RLL configuration making angles comprised between 45° and 75° with respect to the equatorial plane angular direction of the inwardmost ply (25) oppositely disposed relative to the outer plies (22, 23). The helically would layers (24) are disposed between the inwardmost R ply (25) and a radially outward L ply (23).

Abstract: A motorcycle tire having excellent belt cord durability, high-speed durability, impact force absorbability, running stability and uniformity performances is produced by constituting a belt with a low-cost steel cord member having a specified twisting construction of 2 to 7 filaments and a specified space between the mutual filaments over a full length of the cord in the belt.

Abstract: A medium truck tire (10) and more specifically a super single truck tire (10) includes belt plies (23, 24, 25) reinforced with steel cords which make an angle comprised between 0° and 5° with respect to the equatorial plane. Disposed radially outermost over the belt plies (23, 24, 25) is at least one substantially full spiral helically wound layer (22). The steel of the reinforcing cords comprises high elongation steel. The spliced belt plies (23, 24, 25) are in a RLL configuration making angles comprised between 45° and 75° with respect to the equatorial plane angular direction of the inwardmost ply (25) oppositely disposed relative to the outer plies (23, 24). The helically would layer(s) (22) are disposed over the outermost L ply (23) and have a width substantially 100% of the footprint width of the tire tread.

Abstract: A pneumatic tire comprises a carcass 1 comprised of one or more carcass plies toroidally extending between a pair of bead portions, a tread rubber 2 arranged at an outer peripheral side of a crown portion of the carcass 1, a belt 5 arranged between the tread rubber 2 and the carcass 1 and comprised of two belt layers 3, 4, cords 10 of which layers being crossed with each other and extending in an inclination angle of 45-80° with respect to a circumferential direction of the tire, and one or more circumferential strengthening layers 6, 7 arranged at an inner peripheral side of the belt 5 and containing wavy or zigzag cords 9 extended substantially in the circumferential direction of the tire, in which a width L of a belt layer 7 located at the inner peripheral side is made larger than a width M of the circumferential strengthening layer and a width N of a belt layer located at the outer peripheral side is made smaller than the width M of the circumferential strengthening layer.

Abstract: A rubber-covered belt ply forms a belt layer. At least a majority of metal wires in the ply exist as metal wire bundles in which a plurality of metal wires of circular cross-sections and substantially equal wire diameters are aligned in parallel without being twisted together, the metal wire bundles being aligned planarly and in parallel with intervals between the metal wire bundles in a transverse direction. At least one layer, which is a cap layer in which organic fibers are covered with rubber and/or a reinforcing layer which is formed of rubber or whose main component is rubber, is disposed between the belt layer and a tread.

Abstract: A tire has a radial carcass reinforcement surmounted radially on the outside by a crown reinforcement which includes at least two working plies and two meridian reinforcement plies. The axially innermost ends of the meridian reinforcement plies are spaced axially apart. Each meridian reinforcement ply has a plurality of reinforcing elements making an angle larger than 60° with the tire's circumferential direction. The crown reinforcement also includes a circumferential reinforcement whose reinforcing elements make an angle no greater than 10° with the tire's equatorial plane. The tensile rigidity of the circumferential reinforcement in the circumferential direction in areas thereof that are radially coincident with the meridian reinforcement plies is lower than the tensile rigidity of the circumferential reinforcement in areas thereof that are not so radially coincident.

Abstract: A pneumatic tire with a belt ply helically wound on a carcass ply. The crown reinforcing structure of the tire includes a single helically wound belt ply reinforced with high elongation steel cords. A preferred steel cord construction for the reinforcing steel cords is 4×7 (four strands each including seven filaments) with individual 0.26 mm diameter, High Tensile carbon steel filaments.

Abstract: A belt layer is provided at its outer side with a band layer comprising edge bands on left and right sides. When a cross sectional area of one band cord is defined as S (unit; mm2) and a modulus of the band cord when its elongation is 2% is defined as M (unit; N/mm2) and disposition density of the band cord per 1 cm of the band layer is defined as D (unit; the number of band cords/cm), an elongation resistance value K (unit; N·the number of band cords/cm) of the band layer which is determined by the following equation (1) is set to 270 or higher and 830 or lower: K=S×M×D/100.??(1) An elongation percentage T(%) of the band cord in a tire in its natural state in which the tire is not assembled to a rim is set to 0.75% or higher and 1.2% or lower.

Abstract: In a pneumatic tire, a belt layer includes six superposed belt members. The edge of the fourth belt member on the tire-width direction outer side and the edge of the sixth belt member on the tire-width direction outer side are at approximately the same position in a tire width direction.

Abstract: A motorcycle tire comprises a radial carcass ply (1), the carcass in each bead region being turned axially outward around a bead hoop (7) to form a turnup ply portion (8), the tire having a camber value C/L in the range 0.5 to 0.7 characterized in that the tread (6) is provided with a bandage ply (2) disposed radially outward of the carcass ply (1) and comprising cords disposed parallel to the circumferential direction and in the tread central portion the bandage ply (2) is adjacent to the carcass ply (1) and in the axial edge portions of the tread the bandage ply (2) is spaced apart from the carcass ply (1) by a reinforcing strip (3) comprising at least one reinforcing ply comprising textile reinforcing elements disposed at an angle to the tire circumferential direction, the radially outer edge (10) of each turnup portion is separated from the adjacent edge of the reinforcing strip (3) by a distance of at least 5 mm.

Abstract: A method of forming a composite belt structure for a tire is disclosed. The composite belt structure has cord reinforced layers including at least two radially outer zigzag belt layers. The cords per inch in the shoulder portion are greater than the cords per inch in the central portion as measured centered on the centerplane of the belt structure. The method discloses the steps of applying a multicord reinforced strip having a strip width SW onto a rotating crowned building drum, the strip being wound in a zigzag configuration to form at least two zigzag layers, wherein the crowned drum has non-overlapping portions of the strip placed in a central portion and extending in alternation to a pair of shoulder portions having portions of the strips overlapping to form belt layers.

Abstract: A tire noise reducing system comprises a pneumatic tire with a hollow, a wheel rim on which the tire is mounted so that said hollow forms a closed cavity, and a noise damper disposed in the closed cavity, wherein the noise damper is formed by fixing a strip of a porous material to the tire or wheel rim, the noise damper has a volume in a range of from 0.4 to 20% of the volume of the cavity, the noise damper has a sectional shape substantially constant in the tire circumferential direction, and the pneumatic tire comprises a tread portion provided with tread grooves defining a tread pattern having a sea ratio of 20 to 35%.

Abstract: A pneumatic tire for two-wheeled motor vehicles 1 comprises a belt layer 7 and a tread reinforcing layer 9 outside of a single carcass ply 6A made of organic fiber cords. The belt layer 7 is comprised of a belt ply 7A in which steel cords are spirally wound substantially parallel to a tire circumferential direction. The tread reinforcing layer 9 is comprised of a reinforcing ply 9A in which organic fiber cords are aligned to be substantially parallel to the tire circumferential direction. A width RW of the reinforcing ply 9A in a tire axial direction is not less than 30 mm and not more than 90% of a tread grounding width CW.

Abstract: At least one belt layer in which one or plural rubber-coated belt cords are arranged to be spirally wound almost in parallel with a tire circumferential direction on the outer circumference of a body ply. The belt cord is small in the increase rate of tensile load to stretch rate in the range of a predetermined stretch rate or less, but becomes large in the increase rate of the tensile load in another range exceeding the predetermined stretch rate. Therefore, during a vulcanizing and forming process, the belt cord is expanded together with unvulcanized compounded rubber under a small tensile load, and it does not occur to prevent body ply cords from being expanded, so that a green tire is vulcanized and formed with respective parts thereof being adhered as a result of being expanded to keep a correct shape.