Abstract: 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, at least one protective layer being radially to the outside of the working crown layers, said crown reinforcement being topped radially by a tread, said tread being joined to two beads by means of two sidewalls. The tire additionally comprises in each shoulder at least one layer of reinforcement elements which are parallel to each other in the additional layer and are oriented circumferentially, the axially inner end of said additional layer being radially adjacent and external to the radially outermost working layer and said axially inner end of the additional layer being radially adjacent and internal to at least part of the protective layer.

Abstract: The present invention generally relates to light weight tire devices comprising a plurality of layers of steel belts. The layers are each a predetermined fraction of the footprint width, and the width of each layer can vary from one layer to another. Some embodiments also include a pair of wedge strips disposed between two reinforcing layers. Furthermore, some embodiments can include a split belt, wherein the gap between the split belts is substantially occupied by a gum strip. Additionally, the belt ply cords can be angled according to one or more patterns.

Abstract: 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: Provided is a run flat tire having an enhanced ride comfort in running on general road surfaces and an enhanced driving stability on snowy road surfaces at the time when the tire is not punctured, as well as an enhanced maneuverability, particularly starting ability, on icy road surfaces in run-flat running where the tire is punctured. Three belt layers (8, 9, 10) are disposed on an outer circumferential side of a carcass layer (6) in a tread portion (4). In addition, as to the three belt layers, the cord angle ? of the innermost belt layer (8) with respect to a circumferential direction of the tire is set at 15° to 30°, the cord angle ? of the intermediate belt layer (9) with respect to the circumferential direction of the tire is set at not less than 40°, and the cord angle ? of the outermost belt layer (10) with respect to the circumferential direction of the tire is set at 35° to 70°.

Abstract: Provided is a pneumatic tire having excellent durability and driving stability during high-speed running of the vehicle (that is, during high-speed rotation of the tire). The pneumatic tire includes: a carcass; an intersecting belt which is provided on the outer circumference side of a crown portion of the carcass and formed of two inclined belt layers having cords inclined and extending in a direction intersecting each other across a tire equatorial plane; and a circumferential belt layer which is provided on either one of the inner side and the outer side of the intersecting belt in the tire radial direction and includes a spiral cord arranged as being spirally wound at an inclination angle of equal to or smaller than 5 degrees to the tire equatorial plane.

Abstract: A pneumatic low aspect ratio truck has a crown reinforcing structure 7, the crown reinforcing structure 7 has a first steel belt ply 9 between the at least one carcass ply 3 and the tread 5, a second steel belt ply 11 between the first belt ply 9 and the tread 5, such that the first and the second belt plies 9, 11 form a first pair of adjacent working belts. A third steel belt ply 13 between the second steel belt ply 11 and the tread 5 and a fourth steel belt ply 15 between the third steel belt ply 13 and the tread 5 such that the third and the fourth belt plies 13, 15 form a second pair of adjacent working belts. The crown reinforcing structure 7 additionally has at least one circumferential steel strip 17 between the second and the third belt plies 11, 13, wherein the at least one steel strip 17 is positioned essentially radially underneath a shoulder groove location 19.

Abstract: In a pneumatic tire for heavy load including a circumferentially-formed groove running in a tire circumferential direction on a surface of a tread part, when a pneumatic pressure equivalent to a normal inner pressure is applied with reference to a case where a pneumatic pressure equivalent to an inner pressure of kPa is applied, a radius growth in a tire radial direction at a crown center of the tread part and in the circumferentially-formed groove located at the most lateral side in a tire width direction is made to be less than 0.3%.

Abstract: A pneumatic tire has a belt arranged in such a manner that cords are inclined with respect to a tire circumferential direction. A quarter portion is set to a portion which is between 50 to 80% of a belt width around a tire equator line, a center portion is set to a portion which is inside than the quarter portion, and a shoulder portion is set to a portion which is outside than the quarter portion. A relation ?c>?s>?q is satisfied on the assumption that a cord angle in the quarter portion is set to ?q, a cord angle in the center portion is set to ?c, and a cord angle in the shoulder portion is set to ?s, with regard to the cord angle of the belt with respect to the tire circumferential direction.

Abstract: A pneumatic tire has a belt layer arranged in a tread portion. The belt layer includes a first belt ply, a second belt ply arranged in an outer peripheral side of the first belt ply, and a third belt ply arranged in an outer peripheral side of the second belt ply. The third belt ply is provided with a circumference reinforcing portion which is positioned in an inner region of a land portion, and a lateral reinforcing portion which is positioned in an inner region of a main groove. The circumference reinforcing portion is structured such that an angle of a cord with respect to a tire circumferential direction is less than 45°. The lateral reinforcing portion is structured such that an angle of a cord with respect to the tire circumferential direction goes beyond 45°.

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. The tread belt 12 has a radially inner surface 70 having one or more protruding circumferential ribs 72 or grooves 74 that fit into complementary grooves 18 or ribs 19 on an outer crown surface of the tire carcass 14. The tread belt 12 has a maximum axial belt width W at a radially inner surface. The carcass 14 has a maximum section width SW and ply line 20 having a maximum width P wherein W?0.95P, BW?5 0.85P and P<SW.

Abstract: Proposed is a pneumatic tire having excellent durability, handling stability and uneven wear resistance even if weight reduction is achieved by improving a belt. The pneumatic tire according to the present invention having a carcass layer 5 toroidally extending from a tread portion 3 through a side wall portion 2 to a bead portion 1, and a belt layer 6 disposed at the outer side of the carcass layer 5 in the tire radial direction, in which the carcass layer 5 includes one or more carcass plies 5a, the belt layer 6 includes a first belt 7 having a first cord 7a inclined with respect to a tire equator S at an angle in the range of 15° to 75° and a second belt 8 having a second cord 8a extending in parallel to the tire equator S, said first belt 7 having a tensile strength smaller than that of the second belt 8.

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 layer to the other, forming with the circumferential direction angles of between 10° and 45°, which itself is topped radially by a tread, said tread being joined to two beads by means of two sidewalls and the crown reinforcement comprising at least one layer of circumferential reinforcement elements of an axial width less than that of at least one of the working crown layers. According to the invention, the ratio of the axial width of at least one layer of circumferential reinforcement elements to the axial width of the tread is greater than 0.6, and preferably greater than 0.65, and the ratio of the axial width of the tread to the maximum axial width of the tire is strictly greater than 0.89.

Abstract: A pneumatic tire including a carcass layer wherein reinforcing cords are arranged in a tire circumferential direction and ends thereof in a tire width direction extend to bead cores disposed in bead portions of both sides; and a belt layer including a layer provided on an outer side in a tire radial direction of the carcass layer. A range, inward in the tire width direction of ends of the belt layer in the tire width direction, is not less than 5% and not more than 95% of a maximum dimension of the belt layer in the tire width direction; and a carcass strength coefficient K of the carcass layer defined by the formula [carcass strength coefficient K (N/mm·kPa)]=[reinforcing cord count (cords/mm)]×[reinforcing cord strength (N/cord)]×[number of carcass layers]÷[maximum air pressure (kPa)] is such that 0 (N/mm·kPa)<K<0.15 (N/mm·kPa).

Abstract: A method of producing a pneumatic tire in which, a cord material of a secondary belt layer has a larger thermal shrinkage rate than that of the primary belt layer to effectively suppress the radial expansion of a tire and advantageously improve cutting-resistance of a tread as in the conventional tire. In the method, a ribbon-shaped strip 22 is folded in a region R, in a developed plan view of a material 21 forming the secondary belt layer, between a side end e of the forming material 21 and a position distanced from the side end toward the tire equatorial side by ¼ of the overall width of the forming material, such that the thus bent ribbon-shaped strip 22 extends in a curved manner to build a green tire.

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 radially inner spiral layer and at least one zigzag belt reinforcing structure located radially outward of said spiral layer. The zigzag belt width is preferably wider than the spiral layer.

Abstract: A heavy vehicle tire comprising at least four working plies formed of reinforcing elements which, from one ply to the next, cross one another, and comprising at least one protective ply. The tire is supplemented on each side of the circumferential mid-plane by a single working half-ply the reinforcing elements of which make an angle greater than 30° with the circumferential direction, the half-ply being radially on the inside of and adjacent to the radially outermost continuous working ply, its axially outer end being axially on the outside of the ends of the continuous working plies, and the reinforcing elements of the half-ply, the reinforcing elements of the radially outermost continuous working ply and the reinforcing elements of the protective ply the end of which is axially on the outside of the ends of the working plies being oriented in the same direction.

Abstract: A heavy duty pneumatic tire, which allows the inside narrow-width belt layers to have a wide width as desired, and which suppresses the amount of strain generated at side edge portions of the belt layer to be sufficiently small thereby effectively preventing the separation of the belt layer, therefore the belt, in which two inside narrow-width belt layers 1B, 2B and two outside wide-width belt layers 3B, 4B, which have a larger width than the narrow-width belt layers, are sequentially disposed in the outer periphery side of the crown area of the radial carcass 5, wherein a portion of the wide-width belt layer 3B adjacent to the outer periphery side of the two narrow-width belt layers 1B, 2B, corresponding to side-edge vicinity of the narrow-width belt layer 2B of the outer periphery side is formed to be convex in radially outward direction.

Abstract: 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. The tire comprises additionally at least in each shoulder a layer of reinforcement elements which are oriented circumferentially and have an undulation, the axially inner end of said additional layer being radially adjacent to the edge of a working crown layer, the axially outer end of said additional layer being located at a distance from the equatorial plane of the tire which is at least equal to the distance between said plane and the end of the working layer to which it is adjacent and the distance between said layer and the end of the axially widest working crown layer being greater than 1.5 mm.

Abstract: 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 at least two working layers having different axial widths.

Abstract: A tire carcass to be used with any type of tire is shown herein. A tire carcass includes a first ply portion, a second ply portion, each ply portion having an inner sidewall ply, an outer sidewall ply, a first end, a second end, and a bead core, a bridge portion, wherein the first ends of the ply portions are separated by the bridge portion, and at least two bridge plies, wherein the bridge plies span the bridge portion, wherein each of the bridge plies have a first end and a second end.

Abstract: 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. The tire comprises additionally in each shoulder at least one layer of reinforcement elements which are parallel to each other in the layer and are oriented circumferentially, the axially inner end of said additional layer being radially adjacent to the edge of a working crown layer, at least part of said additional layer being radially and/or axially adjacent to the edge of the axially widest working crown layer and the axially outer end of said additional layer being radially internal to the axially widest working crown layer.

Abstract: A pneumatic tire for a motorcycle in which partial abrasion is suppressed by making the slip component of a tread lubber in the circumferential direction of tire as uniform as possible in the ground contacting plane. A cushion rubber layer 38 having elastic modulus lower than that of the tread rubber 30 is arranged on a spiral belt layer 22, and an inclination belt layer 24 including a cord inclining at an angle of 45 to 90 degrees to the circumferential direction of the tire is arranged on the cushion rubber layer 38. Consequently, shear deformation of the cushion rubber layer 38 during traveling can be transmitted to the tread rubber 30 after being smoothed by the inclination belt layer 24.

Abstract: 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.

Abstract: A heavy-duty pneumatic tire capable of sufficiently suppressing the amount of strain occurring in side edges of a belt layer is sufficiently suppressed, despite the required increase in width of the narrow belt layers on the inner layer side, so as to effectively prevent separation of the belt layer and, hence, separation of the belt. The tire includes two narrow belt layers (1B, 2B) on the inner layer side, and two wide belt layers (3B, 4B) on the outer layer side, which are larger in width than the narrow belt layers. The narrow belt layers and the wide belt layers are sequentially arranged on the outer circumferential side of a crown region of a radial carcass (5). The innermost narrow belt layer (1B) has side edges that are convex radially outwards.

Abstract: A puncture resistant pneumatic tire has a tread portion and a pair of lateral tread edges. A belt package is located radially inward of the tread portion and a carcass structure has at least one body ply which extends between and is turned up around a pair of bead cores. A protective band extends circumferentially about the tire radially beneath the tread portion and includes a plurality of circumferentially spaced metal rods, each of which extends in a lateral direction between the tread edges. The protective band may be located radially inward or outward of a spiral ply layer and the rods may be arranged in a staggered laterally offset layered relationship. The rods have a circular cross-section with a diameter of between 1/16 inch and ¼ inch and a length of between 7 inches and 8 inches and will deflect and dislodge the pointed end of road debris before it completely punctures the tire.

Abstract: A pneumatic tire includes a tire body having a crown portion and a pair of sidewalls. At least one reinforcing belt is disposed in the crown portion of the tire. A tag is carried by the reinforcing belt. In one embodiment, the tag is disposed in the location of one of the reinforcing cords that is disposed in the reinforcing belt. In another embodiment, the tag is disposed at the splice of the reinforcing belt. An alternative version of the tire has the tag carried in a depression formed in the outer surface of the tire sidewall. The tag may be encapsulated with an encapsulation material that is also disposed in the depression.

Abstract: A proper balance between ride comfort, steering stability, and road noise is achieved. A pneumatic tire (1) has a band layer (9) comprising a band ply (9A) where band cords are arranged at an angle of not more than 5 deg. with respect to the circumferential direction of the tire on the radially outer side of a belt layer (7). The band ply (9A) comprises a first ply piece (9a) covering only one side of end portions of the belt layer (7) and a second ply piece (9b) disposed adjacently to the first ply piece (9a), covering continuously the central portion of the belt layer (7) and another side of the end portions, and having a width larger than that of the above-mentioned first ply piece (9a). And, the band cords of said first ply piece (9a) and band cords of said second ply piece (9b) are different in modulus.

Abstract: Providing a pneumatic tire for two-wheeled vehicle which is capable of enhancing the braking performance and the high-speed turning performance, while assuring the ride comfort. The carcass has a semi-radial construction, whereby the necessary and minimum rigidity is ensured with the ride comfort being assured. In the crown part of the semi-radial bias carcass 16, a belt layer 26, which is a crossed belt layer, is provided, and inside of the tread end parts, a radial reinforcement band layer 22 in which a plurality of reinforcement cords 24 extending in the radial direction are arranged is provided.

Abstract: The present invention relates to a radial tire for an aircraft having a belt structure capable of sufficiently satisfying a demand for recent high pressure resistance without increase in tire weight and more particularly to a radial tire for an aircraft having a carcass serving as a framework and toroidally extending between a pair of bead portions, and a belt disposed on a radially outer side of the carcass and consisting of at least two belt layers consisting of plies having a plurality of organic fiber cords coated with rubber, wherein the belt is configured in such a manner that elongation at break Lout of a radially outermost belt layer is smaller than elongation at break Lin of a radially innermost belt layer, a ratio Lout/Lin satisfies the relationship 0.8<Lout/Lin<0.95, and elongation at break of a radially outer belt layer is not more than elongation at break of a radially inner belt layer between respective radially adjacent belt layers.

Abstract: A tire includes: a carcass structure including at least one carcass ply, a belt structure, a tread band radially superimposed on the belt structure; two sidewalls; the belt structure including: at least one pair of lateral reinforcing layers incorporating reinforcing elements oriented in a substantially circumferential direction; a first belt layer radially superimposed on the pair of lateral reinforcing layers, provided with reinforcing elements inclined with respect to the equatorial plane of the tire; a second belt layer radially superimposed on the first belt layer, provided with reinforcing elements inclined with respect to the equatorial plane in a direction opposite to those of the first belt layer; an external belt layer applied in a radially external position with respect to the first and the second belt layers. Preferably, the tire is a super single wide base heavy load vehicle tire. The tire is particularly useful for heavy load vehicles such as, for example, trucks, trailers, or buses.

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: 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: 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 tire includes a carcass structure including at least one carcass ply of a substantially toroidal shape, having opposite lateral edges associated with respective right-hand and left-hand bead structures; a belt structure applied in a radially external position with respect to the carcass structure; a tread band applied in radially external position with respect to the belt structure; two sidewalls, each sidewall being applied laterally on opposite sides with respect to the carcass structure, the belt structure including at least one pair of lateral reinforcing layers substantially symmetrically arranged with respect to the equatorial plane of the tire and applied in correspondence with the axially external portions of the tire belt structure, the lateral reinforcing layers being provided with reinforcing elements oriented in a substantially circumferential direction; a first belt layer applied in a radially external position with respect to the at least one pair of lateral reinforcing layers, the first belt

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: 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: 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 heavy vehicle tire comprising at least four working plies formed of reinforcing elements which, from one ply to the next, cross one another, and comprising at least one protective ply. The tire is supplemented on each side of the circumferential mid-plane by a single working half-ply the reinforcing elements of which make an angle greater than 30° with the circumferential direction, the half-ply being radially on the inside of and adjacent to the radially outermost continuous working ply, its axially outer end being axially on the outside of the ends of the continuous working plies, and the reinforcing elements of the half-ply, the reinforcing elements of the radially outermost continuous working ply and the reinforcing elements of the protective ply the end of which is axially on the outside of the ends of the working plies being oriented in the same direction.

Abstract: A belt layer 7 of a heavy load radial tire includes second and third belt plies 7B and 7C in which belt cords are arranged at an angle in a range of 10 to 45° with respect to a circumferential direction of the tire, and a fourth belt ply 7D which is disposed outside of the second and third belt plies 7B and 7C and which is spirally wound in the circumferential direction of the tire. When ply widths of the belt plies 7B to 7D are defined as W2 to W4 and a tread ground-contact width is defined as Tw, the following relations are established: 0.85Tw?W2, 0.85Tw?W3, (W2?W3)?14 mm, W4?40 mm. A distance K between a tire equator and an outer end of the fourth belt ply 7D is in a range of 35% to 40% of the tread ground-contact width Tw. A reinforcing rubber layer 10 having the maximum thickness T1 of not less than 3.0 mm and a complex elastic modulus E* of in a range of 6.0 to 12.0 MPa is disposed between outer ends of the second and third belt plies 7B and 7C.

Abstract: The ground contact pressure on land portions 44 is uniformed so that drivability is improved and uneven wear is suppressed to improve wear resistance. The parts of the carcass layer 28 and belt layer 33 overlapping with the main grooves 42 are convexly curved toward the outside in the radial direction due to the internal pressure. The reinforcing layer 49 is arranged at the position spaced from the neutral axis of deformation in the compressed side in a certain distance, i.e. radially inside of the radially outermost carcass ply 30, and the steel cords 47 which extend in the direction including the tire width direction and its approximate direction and which act as supports for resisting against the compression force are embedded in the reinforcing layer. As a result, the above-mentioned curved deformation can be effectively suppressed.

Abstract: A tire casing 302 is formed on an annular toroidally shaped building surface. The tire casing 302 has a cord attachment elastomeric layer 250 extending over the toroidally shaped building surface to a pair of radial inner ends 32R; a first and second bead stack 220, each bead stack 220 having an axially inner stack 222 and an axially outer stack 224 the axially inner stack 222 attached to one of the radial inner ends 32R of the first elastomeric layer 250; one or more continuous lengths of first ply cords 32A, and one or more continuous lengths of second ply cords 32B. The one or more continuous lengths of the first ply cords 32A in combination with the one or more continuous lengths of the second ply cords 32B form a bias angled cord reinforced belt structure, the first ply cords 32A forming one cord reinforced sidewall and the second ply cords 32B forming an opposite cord reinforced sidewall.

Abstract: A pneumatic radial tire has a carcass structure, a belt structure, and a tread. The belt structure has at least two plies of reinforcing cords, the cords in the at least two plies being inclined at angles greater than 5° relative to the tire centerline. The cords in the belt plies are inclined at equal but opposite directions relative to the tire centerline. The belt plies have a stiffness variation in the circumferential and meridional directions of the belt plies wherein the stiffness variation is in the range of 12 to 25% between a radially outermost belt ply and a radially innermost belt ply.

Abstract: A tire with a radial carcass reinforcement intended to equip a heavy vehicle such as a transport vehicle or construction machinery, the tire having an axial width grater than 37 inches. The tire includes a working crown reinforcement having at least two continuous plies formed from reinforcement elements crossed from one ply to the next, forming with the circumferential direction angles of between 10° and 35°. The working crown reinforcement is supplemented on each side of the circumferential mid-plane by at least three half-plies whose reinforcement elements form with the circumferential direction angles of between 10° and 40°. The half-ply extending axially the most towards the outside is in contact with at least two other working crown half-plies, and the three half-plies radially overlap the axially external ends of at least two continuous working crown plies.

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 radial tire 1 including a carcass 6 and a belt layer 7 is provided with a cord-reinforced layer 12 with reinforcing cords of organic fiber being disposed at angles of 30 to 60 degrees with respect to a tire circumferential direction at a buttress portion Bs thereof. A ply turnup portion 11 of the carcass 6 is terminated radially outside a tire maximum width point M. The cord-reinforced layer 12 is arranged such that its outer end portion in the radial direction 12U is pinched between the carcass 6 and the belt layer 7 and such that its radially inner end portion 12L is secured between the ply main portion 10 and the ply turnup portion 11 of the carcass 6.

Abstract: The invention relates to a tire with radial carcass reinforcement, intended for equipping a heavy vehicle such as a transport vehicle or construction machinery. It refers in particular to a tire having an axial width greater than 37 inches. The tire according to the invention has a working crown reinforcement, composed of at least two continuous working plies and completed on each side of the circumferential center plane by at least two half-plies whereof the metal reinforcing elements form angles greater than the smallest of the angles of the reinforcing elements of the continuous plies with the circumferential direction, with that half-ply extending axially furthest outwards being in contact with the axially widest continuous working crown ply, and the two half-plies radially covering the axially outer end of the said axially widest working ply.

Abstract: A two-piece tire assembly has a removable tread belt 12 for installing about the circumference of a tire carcass 14. The tread belt has at least a pair of belt layers, and one layer comprising inextensible reinforcing cables inclined at substantially zero degrees relative to the circumferential direction of the tire assembly. The cables in zero degree ply have a tensile breaking load of at least 27500 N.

Abstract: A method of fitting a tire for an off road motorcycle. The diameter of the rim of a rear wheel (12) is one inch smaller than the diameter of the rim of a front wheel (18). Further, at least a tire (24) of the rear wheel is substantially a tire having a radial carcass with an aspect ratio of less than or equal to 80% and has at least one spiral belt. By providing a one-inch difference between the diameter of the rim of the rear wheel (12) and the diameter of the rim of the front wheel (18), the basic characteristics of the motorcycle can be maintained with the outer diameter of the rear wheel (12) being substantially the same as that of a conventional rear wheel, and the aspect ratio of the rear wheel tire (24) can further be reduced to 80 to 70%. Further, a so-called spiral belt is combined in conjunction with the radial construction employed for the rear wheel tire (24) so as to moderately suppress the rigidity of the tread portion.

Abstract: In the method of mounting a pneumatic radial tire comprising a spiral belt and a pair cross belt members arranged in parallel to each other at both sides of an equational plane of the tire and at a given opening space onto a vehicle body, the tire is mounted as a front tire and/or a rear tire so as to contact a portion of the cord in the belt member facing the opening space with ground under a given condition in a forward rotating direction of the tire.