Abstract: A motorcycle radial tire which comprises a tread curved so that the maximum cross section width of the tire lies between the tread edges, a carcass having at least one ply of organic fiber cords extending between beads of the tire and turned up around bead cores disposed one in each bead, a belt disposed radially outside the carcass and comprising a breaker and a band, the breaker comprising a first ply disposed adjacently to the carcass and a second ply disposed on the radially outside of the first ply, the first and second breaker plies made of parallel cords inclined with respect to the tire equator so that the first ply cords cross the second ply cords, the edges of the first breaker ply folded back upon the second breaker ply so that a space is provided between the axially inner edges of the folded portions, the band disposed radially outside the breaker to extend over said space, the band comprising a ply of organic fiber cords wound spirally at an angle of not more than 5 degrees with respect to the ti

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

Abstract: A tire for motor cycles has a belt layer containing aromatic polyamide fiber cords spirally wound around a carcass substantially parallel to the equator of a tire, wherein the belt layer is imaginarily divided into a central region (M) and shoulder regions (S and S) at the border points (P and P) spaced apart in the axial direction by a distance of 0.25 times to 0.35 times the tread width (TW) from the equator of a tire and the initial modulus of elasticity of the belt cords in the central region (M) is set to be larger than that of the cords in the shoulder regions (S and S).

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

Abstract: Pneumatic tire is provided with a belt layer including a first belt ply of which width is more than 0.9 times and less than 0.95 times the tread width and a second belt ply of which width is more than 0.88 times and less than 0.92 times the tread width, that are arranged in sequence from a carcass side.One of the belt plies is composed of two belt ply parts which are separated by a gap on the tire's equator. The other belt ply is composed of a middle belt ply part and two side-belt ply parts which are separated by a gap at two division points each spaced apart from the equator in the axial direction by a distance of 0.2 to 0.3 times the other belt ply width.Initial elasticity EA of the middle belt ply part is preferably larger than the initial elasticity EB of the other belt ply parts, especially, the ratio EA/EB is more preferably 2.0 or more and 4.0 or less.The gaps are preferably 0.5 mm to 4.0 mm.

Abstract: A tire for a motorcycle comprising a tread, sidewalls extending inwardly from both ends of the tread in a radial direction, bead portions positioned at the radially inward ends of the sidewalls, a toroidal reinforcement carcass composed of reinforcement cords which extend approximately parallel with each other in the radial direction of the tire and of which both end portions are turned up around bead cores, a breaker arranged on the radially outer side of the carcass, the breaker comprising reinforcement tire cords whose tensile strength is not less than 7 g/d and initial modulus is not less than 200 g/d laid at angles of 10.degree. to 45.degree. to the circumferential direction, and a band over the breaker and having a width greater than the breaker so as to axially extend past the outermost edges of the breaker and comprising parallel reinforcement cords laid at angles of 10.degree. to 25.degree.

Abstract: An ATV tire is disclosed which has a plurality of blocks on the tread which extend from one side to another side of said tread in a zig-zag manner form and are spaced apart circumferentially, each of the blocks including a center region C1, middle regions C2, C2, side regions S1, S1 and shoulder regions S2, S2, the center region C1 extending in an axial direction symmetrically about the equator of the tire and having a cut-off portion G therein, the middle regions C2, C2 and the side regions S1, S1 forming a V-shaped bending portion, and the shoulder regions S2, S2 extending axially. The ATV tire is used on the ATV which can run on both rough land and water. When the ATV runs on rough road, the strong traction is attained by such blocks. When running on water, the blocks function as so called of water wheel to blades to attain strong propulsion especially due to the V-shaped bending portion.

Abstract: There is disclosed a method for making a pneumatic tire comprising providing a pair of circular half body members including the pair of circular half body members with each other by welding their tread base portions to form a tire main body, applying a tread main body including an uncured breaker and an uncured tread to the outer periphery of the tire main body to form a row cover tire; and to vulcanize the row cover tire in a mold to weld the tread main body and the tire main body by the heat at the vulcanization and to form tread grooves.

Abstract: A snowmobile including a body a pair of rear wheels with tires a motor for driving the rear wheel, an axis connected to a handle originally for a front wheel, and skid member mounted on the axis. The skid member comprises a skid, extending in the longitudinal direction of the body, bent upward in its front part, support members protuberantly provided on the upper surface of the skid, and rotatably connected to the axis and at least one fin, protuberantly provided on the under surface of the skid, extending front to rear from a position beneath the above mentioned support member, located at the substantial center in its longitudinal direction of the skid, and the length of the fin is set in a range of 40 to 60% of the length of the skid.

Abstract: A golf cart having: a front wheel including a low pressure tire of which the tread is provided with a plurality of circumferentially extending grooves; and a rear wheel including a low pressure tire of which the tread is substantially smooth but provided with a plurality of spikes, and the low pressure tire is inflated to a low air pressure of 0.1 to 1.0 kg/cm.sup.2. The golf cart is characterized by the grooves extending substantially straight in the circumferential direction of the tire; the tire of the front wheel comprising a carcass of a bias construction; and the tire of the rear wheel comprising a carcass of a radial construction without a belt for stiff reinforcement beneath the tread.

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

Abstract: Radial tires for motorcycles comprising a tread portion, side wall portions, bead portions, a carcass, a breaker, and optionally a reinforcing cord layer arranged outside the carcass and extending from one bead portion to the other bead portion and bead apexes made of a hard rubber, said tread portion having a plurality of longitudinal grooves in the circumferential direction at an angle of at least 5.degree. with respect to the cords of the most outer ply of the breaker. The motorcycle radial tires of the invention have an improved transverse stiffness at the side wall portions and moreover do not cause cracks at the bottom of the grooves in the tread portion.

Abstract: A low pressure tire, which is effectively used with a relatively small load in all terrain vehicles suited to be driven on various uneven grounds such as bad roads, tillage and sandy soil, comprising crown and side portions which consist of a carcass ply formed of synthetic fibre monofilaments formed in a reed-screen pattern and a rubber layer.

Abstract: The present invention provides a tire assembly capable of use with a tire rim of a tube tire having a valve hole with a first diameter and capable of use with a tire rim of a tubeless tire having a valve hole with a second diameter, the first diameter being less than the second diameter, the tire assembly including an inner tube provided with a threaded air valve stem having an outer diameter less than the first diameter, and a tightening nut provided with a thread for threading engagement with the threaded valve stem, the tightening nut provided on one end with a flange portion having an outer diameter substantially equal to the second diameter.

Abstract: A pneumatic tire for use on a motorcycle, comprising a tire cover having a tread portion, a pair of opposed side walls integral with the tread portion and a pair of opposed bead portions integral with the respective side walls and adapted to firmly engage with associated rim flanges of a wheel rim. The tire cover includes a reinforcing structure for preventing the tire from collapsing when it is at least partially deflated, which reinforcing structure comprises a bias-ply carcass and a reinforcement layer. The reinforcement layer has both ends terminating adjacent and in spaced relation to the bead cores within the bead portions and is made of a plurality of juxtaposed textile cords. The reinforcing structure may have a pair of side reinforcing layers embedded in the tire cover adjacent the respective side walls.

Abstract: A pneumatic tire for use on a motorcycle, comprising a tire cover having a tread portion, a pair of opposed side walls integral with the tread portion and a pair of opposed bead portions integral with the respective side walls and adapted to firmly engage with associated rim flanges of a wheel rim. The tire cover includes a reinforcing structure for preventing the tire from collapsing when it is at least partially deflated, which reinforcing structure comprises a bias-ply carcass, a reinforcement layer of steel cord and a pair of side reinforcing layers embedded in the tire cover adjacent the respective side walls. The reinforcement layer has both ends terminating adjacent and in spaced relation to the bead cores within the bead portions and is made of a plurality of juxtaposed steel wires or cords.

Abstract: A bias-ply pneumatic tire for use in a motorcycle incorporating a textile cord carcass ply structure, which comprises at least one reinforcement layer of steel cord substantially forming a part of the carcass structure. The reinforcement layer is laid down on a bias at an angle within the range of 20.degree. to 45.degree. relative to the mid-circumferential plane of the tire. Both ends of the reinforcement layer terminate without being turned up around the respective bead cores nor secured thereto. The reinforcement layer may be positioned on the radially outermost surface of and/or between any adjacent pair of the textile cord plies of the carcass structure. In addition, the number of the reinforcement layer is not limited to one.

Abstract: A vehicle wheel structure for use with a pneumatic tire to be fitted around the wheel rim of the wheel structure. The wheel rim is provided with a flexible, endless band of rubber material held flat on the surface of the wheel rim which faces the pneumatic tire. To avoid a lateral displacement of the flexible endless band relative to the wheel rim, the band is formed with a plurality of ribs which, when the band is held flat on the surface of the wheel rim, engage into mating grooves formed in the wheel rim structure. Separate bead stoppers are also employed to press the bead portions of the tire against the respective rim flanges to achieve tight contact between the bead portions of the tire and the respective rim flanges and also to seal holes through which bolts extend for securing the bead stoppers in position.