In a cross-section of a pneumatic tire, a contour of the bead core is a polygon formed by tangent lines of circumferential portions of a bead wire, the contour includes a vertex with an acute angle and a bottom side opposite the vertex, the carcass layer is folded back along a circumference of the bead core in a bead portion, a folded back portion of the carcass layer from an outer end of the bead core extends in the radial direction, and a distance in the radial direction between a center of an arc profile of a tire outer surface and a straight line extending in the lateral direction through the vertex is within 20% of a radius r of the arc, and a distance in the lateral direction between the center of the arc and a straight line extending in the radial direction through the vertex is within 2r±0.4r.

In a cross-section of a pneumatic tire, a contour of the bead core is a polygon formed by tangent lines of circumferential portions of a bead wire, the contour includes a vertex with an acute angle and a bottom side opposite the vertex, the carcass layer is folded back along a circumference of the bead core in a bead portion, a folded back portion of the carcass layer from an outer end of the bead core extends in the radial direction, and a distance in the radial direction between a center of an arc profile of a tire outer surface and a straight line extending in the lateral direction through the vertex is within 20% of a radius r of the arc, and a distance in the lateral direction between the center of the arc and a straight line extending in the radial direction through the vertex is within 2r±0.4r.

A run-flat tire includes a side reinforcing rubber provided in a tire side portion. The run-flat tire is formed of a resin material, has a prescribed width in the tire width direction, and is provided with a reinforcing ring portion having an annular shape along the tire circumferential direction. The reinforcing ring portion is provided outside the tire radial direction of a carcass, and an elastic modulus of the reinforcing ring portion of the central region in the tire width direction is higher than an elastic modulus of the reinforcing ring portion in either position of the shoulder regions in the tire width direction.

A tire includes a circular tire frame member formed from a frame-resin material and a covered cord member. The covered cord member includes a reinforcing cord provided in the tire frame member and extending along a tire circumferential direction, a covering-resin layer formed from a covering-resin material, covering the reinforcing cord, and bonded to the tire frame member, and a bonding-resin layer. The bonding-resin layer is formed from a bonding-resin material having an elastic modulus higher than that of the covering-resin material, is interposed between the reinforcing cord and the covering-resin layer, bonds the reinforcing cord and the covering-resin layer together, and has a layer thickness thicker than a layer thickness of the covering-resin layer.

A tire 2 includes a pair of beads 12 and a carcass 14. A core 28 of each bead 12 includes a body 34 having a hexagonal cross-section, and a cover 36 covering the body 34. The cover 36 is wrapped around the body 34, and the number of turns the cover 36 is wrapped around the body 34 is greater than or equal to one and smaller than two. The cover 36 includes a plain weave fabric obtained by interlacing warp threads 72 and weft threads 74. The warp threads 72 and the weft threads 74 intersect. An angle of the intersection is greater than or equal to 45° and not greater than 125°. The warp threads 72 are inclined relative to a carcass cord 70. An angle of the inclination is greater than or equal to 22.5° and not greater than 67.5°.

A tire 2 includes a pair of beads 12 and a carcass 14. A core 28 of each bead 12 includes a body 34 having a hexagonal cross-section, and a cover 36 covering the body 34. The cover 36 is wrapped around the body 34, and the number of turns the cover 36 is wrapped around the body 34 is greater than or equal to one and smaller than two. The cover 36 includes a plain weave fabric obtained by interlacing warp threads 72 and weft threads 74. The warp threads 72 and the weft threads 74 intersect. An angle of the intersection is greater than or equal to 45° and not greater than 125°. The warp threads 72 are inclined relative to a carcass cord 70. An angle of the inclination is greater than or equal to 22.5° and not greater than 67.5°.

A tire has an axis of rotation. The tire includes two inextensible annular bead structures for attachment to a vehicle rim, a carcass-like structure having at least one reinforced ply, the carcass-like structure being wound about the two bead structures, a tread disposed radially outward of the carcass-like structure, and a shear band structure disposed radially between the carcass-like structure and the tread. The two bead structures include at least one layer of a three dimensional fabric including a tear drop frame structure and open cells defined by the tear drop frame structure.

A tire has an axis of rotation. The tire includes two inextensible annular bead structures for attachment to a vehicle rim, a carcass-like structure having at least one reinforced ply, the carcass-like structure being wound about the two bead structures, a tread disposed radially outward of the carcass-like structure, and a shear band structure disposed radially between the carcass-like structure and the tread. The two bead structures include at least one layer of a three dimensional fabric including a tear drop frame structure and open cells defined by the tear drop frame structure.

A tire has an axis of rotation. The tire includes two inextensible annular bead structures for attachment to a vehicle rim, a carcass-like structure having at least one reinforced ply, the carcass-like structure being wound about the two bead structures, a tread disposed radially outward of the carcass-like structure, and a shear band structure disposed radially between the carcass-like structure and the tread. The two bead structures include at least one layer of a lightweight foam material.

A tire has an axis of rotation. The tire includes two inextensible annular bead structures for attachment to a vehicle rim, a carcass-like structure having at least one reinforced ply, the carcass-like structure being wound about the two bead structures, a tread disposed radially outward of the carcass-like structure, and a shear band structure disposed radially between the carcass-like structure and the tread. The two bead structures include at least one layer of a lightweight foam material.