Abstract:
A bicycle tyre (100), comprising a carcass structure (2) and a tread band (7) applied in a radially outer position with respect to the carcass structure (2). The tread band (7) comprises a crown portion (7a) extending astride of an equatorial plane (X) of the tyre (100) and having a predetermined radius of curvature (R1) and a pair of lateral portions (7b) arranged on axially opposite sides with respect to the crown portion (7a) and each having a second radius of curvature (R2) greater than said first radius of curvature (R1).
Abstract:
To reduce noise while suppressing increase in rolling resistance, without affecting the formation of a carcass line, provided is a pneumatic tire 10 comprising an inner liner 17. The thickness of the inner liner 17 at least in part of a side portion 18 is 1.5 mm or more. When the tire 10 is mounted to a rim, and an internal pressure of 250 kPa or more is applied to the tire, in a case where a sectional width SW of the tire is less than 165 mm, a ratio of the sectional width SW to an outer diameter OD of the tire, SW/OD, is 0.26 or less; and in a case where the sectional width SW of the tire is 165 mm or more, the sectional width SW and the outer diameter OD of the tire satisfy a relation expression OD≥2.135×SW+282.3.
Abstract:
Rubber compositions are disclosed having a reinforcing filler of carbon black having select properties and a rubber, and tires and tire components and belt skims made from the rubber compositions. The rubber compositions can further include an additional reinforcing filler to form a blend of fillers. The rubber compositions are used to form belt assemblies having reinforcing components, such as metal cords. Also disclosed herein are methods of manufacturing belt assemblies and tires with belt assemblies disposed in the belt skim rubber compositions.
Abstract:
A tyre for bicycle wheels, having a carcass structure, a belt layer arranged in a radially outer position with respect to the carcass structure and a tread band arranged in a radially outer position with respect to the belt layer. The carcass structure has a carcass ply engaged with a pair of annular anchoring structures and including a plurality of reinforcing cords. The cords are inclined, with respect to an equatorial plane of the tyre, at a first angle between about 65° and about 90°. The belt layer has a reinforcing cord wound onto the carcass structure according to a winding direction oriented, with respect to the equatorial plane, at a second angle between about 0° and about 30°.
Abstract:
A method for manufacturing an annular carcass of a tire includes providing first and second ply materials, each including cords; winding at least a layer of the first ply material and a layer of the second ply material onto a carcass drum so the first ply material radially surrounds the second ply material; arranging two cables onto the cylindrical carcass preform; turning the part of the cylindrical carcass preform about the closer cable onto the part of the cylindrical carcass preform between the two cables; and expanding the cylindrical carcass preform to form an annular carcass having, in a bead area, inner and outer layers of the first ply material and inner and outer layers of the second ply material. The ply materials are arranged so the cords thereof are arranged cross-wise with respect to its neighboring ply materials or a neighboring ply material, considering the innermost or outermost layer.
Abstract:
There is provided a pneumatic bias tire capable of preventing a separation failure between carcass plies in the bending deformation of a tire side portion under an action of a high load. In a heavy duty pneumatic bias tire having a ply rating of not less than 58 and an aspect ratio of not more than 80%, a rubber volume as the product of a distance between ply cords in the carcass ply and a distance between ply cords of mutually adjoining carcass plies with respect to three or more inside carcass plies of an innermost carcass ply group in at least a portion corresponding to a position of a maximum tire width is 500-1350 mm3.
Abstract:
A carcass (14) includes two carcass plies (16) and (17). A carcass cord is provided at an angle of 65 to 88 degrees with respect to the circumferential direction of a tire (10). The carcass ply (16) is wound upon a bead (13) from an inside toward an outside in a radial direction. The carcass ply (16) overlaps symmetrically in a crown portion (18). The carcass plies (16) and (17) are fastened and reinforced in the radial direction by means of a band (15). An overlapping dimension (Wo) of the carcass ply (16) is set to be 30% to 90% of a tread width (W). The carcass ply (17) is extended to have a height (h) along a sidewall (12). The height (h) is set to be 20% of a height (H) of the sidewall (12) or more.
Abstract:
A combination system of pneumatic semiradial tires for front and rear wheels comprises a carcass of two carcass plies and a belt of two belt plies, in which cord extending directions in each of the carcass and the belt are opposite to each other with respect to the equator of the tire between the front tire and the rear tire, and is excellent in the turning performance when the combination system is applied to a racing vehicle running on a circuit course in one-way direction over a greater part of a full running distance.
Abstract:
A pneumatic tire has a carcass composed of at least one carcass ply extending from a tread part through sidewall parts and turned up around a bead core in each of two bead parts. The carcass ply comprises a plurality of ply strips which are continuously arranged in the tire circumferential direction with overlapping portions, wherein one end in the tire circumferential direction of one ply strip overlaps to an outer surface of an adjacent ply strip adjacently arranged on one end side, and the other end in the tire circumferential direction of the one ply strip overlaps to an inner surface of an adjacent ply strip adjacently arranged on other end side.
Abstract:
A heavy duty high speed cross ply tire has a carcass composed of at least one aromatic polyamide fiber cord ply, the product T.sqroot.D of the cable twist number T (turns/10 cm) of the belt cord and the square root of the total denier number D (deniers) of the cord is 2.466.times.10.sup.3 to 3.036.times.10.sup.3 and the elongation E (%) at breakage of the belt cord divided by the total denier number D is 7.78.times.10.sup.-4 to 12.22.times.10.sup.-4.