A pneumatic tire comprising a carcass 11, at least one inclined belt layer 13 having a cord extending inclined at an angle of 30° or more relative to the tire circumferential direction, and a tread 15 arranged outward in the tire radial direction of the inclined belt layer 13, wherein a circumferential cord layer 14 arranged inward in the tire radial direction of the tread 15 has a high-rigidity region and a low-rigidity region and the high-rigidity region has a higher negative ratio in a ground contact width of the tread 15 than the low-rigidity region.

An outermost end of a carcass folded-up portion is located in a tire width direction inside than an end in the tire width direction of the outermost inclined belt layer, in the tire radial direction between a carcass main body portion and the innermost inclined belt layer. A carcass cord in the folded-up portion located on the outermost side of the tire and a belt cord of the outermost inclined belt layer cross each other to be inclined in the same direction in a tire circumferential direction as being from one side toward the other side in the tire width direction, a difference in inclination angle is 30° or less, a width of the outermost inclined belt layer is larger than that of the innermost inclined belt layer, and in-plane rigidity per unit width of the innermost inclined belt layer is higher than that of the outermost inclined belt layer.

The tire for a construction plant vehicle includes a tread and a crown reinforcement arranged radially internal to the tread. The crown reinforcement includes a protective reinforcement, a working reinforcement, and a hoop reinforcement. The protective reinforcement includes at least one protective ply that exhibits a force at break Fm.sub.NSP. The working reinforcement includes at least one working ply that exhibits a force at break Fm.sub.NST. The hoop reinforcement includes at least one hooping ply, each of which includes hoop reinforcing elements that make an angle at most equal to 10 with a circumferential direction of the tire. The working reinforcement is arranged radially internal to the protective reinforcement. A ratio Fm.sub.NSP/Fm.sub.NST is greater than or equal to 0.27 and less than or equal to 0.90.

A pneumatic tire according to the present disclosure is a pneumatic tire comprising an annular rubber-coated belt including a cord and a coating rubber with which the cord is coated, and comprises a resin layer located inside or outside the rubber-coated belt in a tire radial direction, and having an elastic modulus larger than an elastic modulus of the coating rubber, and a cushion material interposed in at least a space between an outer end of one of the rubber-coated belt and the resin layer in a tire width direction and the other one of the rubber-coated belt and the resin layer, and having an elastic modulus smaller than the elastic modulus of the coating rubber.

A pneumatic tire comprising a carcass 11, at least one inclined belt layer 13 having a cord extending inclined at an angle of 30 or more relative to the tire circumferential direction, and a tread 15 arranged outward in the tire radial direction of the inclined belt layer 13, wherein a circumferential cord layer 14 arranged inward in the tire radial direction of the tread 15 has a high-rigidity region and a low-rigidity region and the high-rigidity region has a higher negative ratio in a ground contact width of the tread 15 than the low-rigidity region.

A tire for a heavy construction-type vehicle includes a tread, a radial carcass reinforcement, and a crown reinforcement. The crown reinforcement includes a working reinforcement and a hoop reinforcement. The working reinforcement includes two working layers, each of which includes inelastic metallic reinforcers that are crossed from one layer to a next layer and that make an angle in a range of from 15 to 40 with respect to a circumferential direction. The hoop reinforcement, which is a ply that is wound circumferentially to form a radial stack of at least two hooping layers, includes circumferential elastic metallic reinforcers that make an angle equal to at most 2.5 with respect to the circumferential direction. The hoop reinforcement is radially positioned between the working layers, and the circumferential metallic reinforcers of the hoop reinforcement have a force at break equal to at least 800 daN.

Provided is a rubber-cord composite, a tire reinforcing member including the composite, and a tire including the reinforcing member. The rubber-cord composite includes a reinforcing cord, and the composite forms a spiral cord layer in the tire reinforcing member. The twist coefficient of the reinforcing cord is greater than 0.3.

Provided is a rubber-cord composite, a tire reinforcing member including the composite, and a tire including the reinforcing member. The rubber-cord composite includes a reinforcing cord, and the composite forms a spiral cord layer in the tire reinforcing member. The twist coefficient of the reinforcing cord is 0.3 or less.

A tire includes a tire frame member made of a resin material; a top tread disposed outside the tire frame member in a tire radial direction; a belt layer disposed between the tire frame member and the top tread, the width dimension BW of the belt layer in a tire axial direction being in a range of from 85 to 105% of the ground width dimension TW of the top tread; and a belt reinforcement layer disposed at end portions of the belt layer in a tire width direction, the belt reinforcement layer having lower stiffness than the belt layer.

A tire for a heavy construction-type vehicle includes a tread, a radial carcass reinforcement, and a crown reinforcement. The crown reinforcement includes a working reinforcement and a hoop reinforcement. The working reinforcement includes two working layers, each of which includes inelastic metallic reinforcers that are crossed from one layer to a next layer and that make an angle in a range of from 15 to 40 with respect to a circumferential direction. The hoop reinforcement, which is a ply that is wound circumferentially to form a radial stack of at least two hooping layers, includes circumferential elastic metallic reinforcers that make an angle equal to at most 2.5 with respect to the circumferential direction. The hoop reinforcement is radially positioned between the working layers, and the circumferential metallic reinforcers of the hoop reinforcement have a force at break equal to at least 800 daN.