A pneumatic tire having a dual reinforcing belt structure, which minimizes deformation of the tire tread section during high-speed driving, particularly deformation of the tire shoulder parts, suppresses a standing wave phenomenon, and enhances driving stability. The pneumatic tire having a dual reinforcing belt structure includes a tread section, a sidewall section and a bead section, in which the bead section is provided with a carcass in a turned-up manner, a plurality of belt layers are provided by lamination between the carcass and the tread section, and a reinforcing belt is provided on top of the belt layer, while the reinforcing belt is a dual reinforcing belt in which belts made of different materials are arranged.

A radial tire (1) for a heavy-duty vehicle of construction plant type, and aims to increase the rupture strength of the hoop reinforcement thereof having circumferential layers, ensuring satisfactory endurance of the crown reinforcement thereof. According to the invention, the at least one circumferential hooping layer (71, 72) comprises a median portion (711, 721) having a median width (L11, L21) and a median tensile elastic modulus (E11, E21), and two lateral portions (712, 722) that axially extend the median portion (711, 721) on either side and each have a lateral width (L12, L22) and a lateral tensile elastic modulus (E12, E22), the lateral width (L12, L22) is at least equal to 0.05 times the median width (L11, L21), and the lateral tensile elastic modulus (E12, E22) is at most equal to 0.9 times the median tensile elastic modulus (E11, E21).

To provide a tire that is not only improved in durability, steering stability, and low rolling resistance in high-speed driving but also excellent in tire productivity. A tire including a pair of bead cores (11), a carcass including at least one carcass ply (12) extending between the pair of bead cores (11), a belt (13) including at least one belt layer placed outward in a tire radial direction of the carcass, and at least one belt reinforcement layer (14) placed outward in a tire radial direction of the belt (13), in which a reinforcement cord of at least one of the carcass ply (12) and the belt reinforcement layer (14) includes a cord using a polyamide multifilament including a polycondensate of a dicarboxylic acid including an aromatic dicarboxylic acid with a diamine.

A pneumatic tire having a carcass and a belt reinforcing structure, the belt reinforcing structure comprising: a zigzag belt reinforcing structure formed of a strip of one or more reinforcement cords, the strip of one or more reinforcement cords being inclined at 5 to 30 degrees relative to the centerplane of the tire extending in alternation to turnaround points at each lateral edge, wherein the zigzag strip of cords is formed from two different reinforcement cords made of different materials, and a low angle belt of the tire has a higher EPI than the zigzag belt.

The present invention provides a tire that uses an elastomer-metal cord composite, which composite is obtained by coating metal cords with an elastomer, each metal cord being composed of a bundle of metal filaments arranged without being twisted, and which composite is capable of highly improving the performance of the tire. The above described tire is one including a belt (105) which includes at least two belt layers (105a) and (105b). In this tire, the belt layers (105a) and (105b) are each obtained by coating metal cords (2) with an elastomer (3), each metal cord (2) being composed of a bundle of a plurality of metal filaments (1) arranged in a row without being twisted; at least one pair of adjacent metal filaments in the metal cord (2) differ in at least one of the amount of shaping and shaping pitch; each of the belt layers (105a) and (105b) has a thickness t1 of more than 0.30 mm and less than 1.00 mm; and the distance g in the tire radial direction between the metal cords (2) in the two adjacent belt layers (105a) and (105b) is 0.10 mm or more and 1.20 mm or less at the center of the tire.

A pneumatic tire includes a carcass layer and belt layers including belt cords inclined with respect to a circumferential direction, the belt cords of different layers being arranged in a criss-cross manner. In at least one belt layer, an inclination angle α of the belt cords with respect to the circumferential direction at a center position and an inclination angle β of the belt cords with respect to the circumferential direction at a belt end position satisfy 15°≤β<α≤35°. A maximum ground contact length L1 and a ground contact length L2 satisfy 0.8≤L2/L1≤1.0, where L1 is the maximum ground contact length in the circumferential direction, W1 is a maximum ground contact width in a radial direction, and L2 is the ground contact length in the circumferential direction at a position 40% of W1 from the center position outward in a lateral direction.

The present invention provides a tire that uses an elastomer-metal cord composite, which composite is obtained by coating metal cords with an elastomer, each metal cord being composed of a bundle of metal filaments arranged without being twisted, and which composite is capable of highly improving the performance of the tire. The above-described tire is a tire (100) including a belt (105) which includes at least two belt layers (105a) and (105b). In this tire, the belt layers (105a) and (105b) are each obtained by coating metal cords (2) with an elastomer (3), each metal cord (2) being composed of a bundle of a plurality of metal filaments (1) arranged in a row without being twisted; the metal filaments (1) are shaped, and at least one pair of adjacent metal filaments (1) in the metal filaments (1) have different phases from each other; each of the belt layers (105a) and (105b) has a thickness of more than 0.30 mm and less than 1.00 mm; and the distance in the tire radial direction between the metal cords (2) in the two adjacent belt layers (105a) and (105b) is 0.10 mm or more and 1.20 mm or less, at the center of the tire.

A pneumatic tire having a carcass and a belt reinforcing structure, the belt reinforcing structure comprising: a zigzag belt reinforcing structure formed of a strip of reinforcement cords, the strip of reinforcement cords being inclined at 5 to 30 degrees relative to the centerplane of the tire extending in alternation to turnaround points at each lateral edge, wherein the strip of cords is formed from two different cords made of different materials.

A pneumatic tire having a carcass and a belt reinforcing structure, the belt reinforcing structure comprising: a zigzag belt reinforcing structure formed of a strip of one or more reinforcement cords, the strip of one or more reinforcement cords being inclined at 5 to 30 degrees relative to the centerplane of the tire extending in alternation to turnaround points at each lateral edge, wherein the zigzag strip of cords is formed from two different reinforcement cords made of different materials, and a low angle belt of the tire has a higher EPI than the zigzag belt.

A fiber belt including at least one ferrous element is provided. The inclusion of the ferrous element, for example a ferrous cord, may permit magnetic manipulation of the belt. In one embodiment, a tire belt is provided, the belt comprising: a plurality of non-magnetic cords oriented in a row substantially parallel to one another; at least one ferrous cord oriented in a row substantially parallel to the plurality of non-magnetic cords; and wherein the plurality of non-magnetic cords and the at least one ferrous cord are calendered in a rubber material.