A pneumatic tire that can enhance durability and productivity of a carcass edge portion is disclosed. The pneumatic tire can include a tread portion, a side wall portion, and a bead portion and in which a carcass is installed at the bottom of the side wall portion and the tread portion, wherein the carcass is configured with a bottom carcass sheet and an upper carcass sheet, one end of the bottom carcass sheet having a termination point at a position that winds up a bead core of the bead portion in an outward direction, and one end of the upper carcass sheet having a termination point at an inner side surface of the bead portion.

Resistance to unseating of a tire operating at low pressure is achieved by a tire comprising at least one bead having an axial width at the seat D comprising at least one main circumferential reinforcing element (22) of which the radially innermost point (222) is at a radial distance Z and at an axial distance Y from the radially innermost point (211) of the bead, and such that Y/D is at least equal to 0.5 and Z/D is at most equal to 0.4. This same bead comprises at least one bead layer (23) surrounding the bead filler rubber (21) and such that its axially outermost end (231) is radially on the outside of the end (311) of the carcass layer (31) and it also comprises at least one additional circumferential reinforcing element (24), radially on the inside of the radially outermost point (223) of the main circumferential reinforcing element (22).

A tire includes: a ring shaped tire frame member that is made of a resin with plural tire pieces joined along a tire circumferential direction; a joint portion reinforcing belt that is adhered to the tire frame member, that extends around the tire circumferential direction, and that covers a joint portion of the plural tire pieces; and a tread layer that is provided further to the tire radial direction outside than the tire frame member and the joint portion reinforcing belt.

Aircraft tire comprises carcass reinforcement (5) comprising a first family of carcass layers extending between two beads (3), having at least one carcass layer wrapped, within each bead, from the inside towards the outside of the tire, around a bead wire (6) to form turn-up (511) having free end (E.sub.1) radially outside of radially outermost point (E) of the bead wire. The second family comprises at least two carcass layers, adjacent each to the next, extending, within each bead, from outside towards inside of the tire, as far as their respective ends (E.sub.2) which are radially inside of axial straight line (D.sub.Y) through centre (O) of bead wire (6) and axially inside of a radial straight line (D.sub.Z) through centre (O) at axial distance (d.sub.2) at least equal to 5 mm. The carcass layers of the second family are axially inside of at least one turn-up of a carcass layer of the first family.

A pneumatic tire has two carcass layers including carcass cords are laid between a pair of bead portions, bead cores and bead fillers are disposed in the bead portions, and at least two belt layers are disposed on the outer circumferential side of the carcass layers, the tire being characterized in that both ends of the inner carcass layer are folded back from the tire inner side to the tire outer side around the bead cores, and the ends of the folded back portions of the inner carcass layer are disposed between the innermost belt layer and the outer carcass layer, while both ends of the outer carcass layer are disposed so as to pass between a main portion of the inner carcass layer and the bead fillers, and both ends of the outer carcass layer terminate at the bead portions without being folded back around the bead cores.

A pneumatic tire includes an up ply, a down ply, and a cord reinforcing layer. The up ply has: a main body section and a wound section. The down ply is provided on a tire outer surface side of the up ply. The cord reinforcing layer is provided from the inner side to the outer side in the tire axial direction of the bead core to cover the up ply, and has reinforcing cords. A tip of the wound section is located outward in a tire radial direction from a rim flange. An outer end in the tire axial direction of the cord reinforcing layer is located outward in the tire radial direction from a bead upper line and inward in the tire radial direction from the rim flange. The bead upper line extends from an outer surface in the tire radial direction of the bead core.

Tire comprising carcass reinforcement (7) comprising turned-up carcass layers (71, 72) and non-turned-up carcass layers (73, 74), each turned-up carcass layer (71, 72) comprising main part (711, 721) wrapped, in each bead (4), from the inside of the tire towards the outside around bead wire (8) of diameter D, to form turn-up (712, 722) of which end (E1, E2) is positioned radially on the outside of radially outermost point E of bead wire (8) at a radial distance (a1, a2), each non-turned-up carcass layer (73, 74) having an end (E3, E4) which is positioned at radial distance (b3, b4) from the radially outermost point of E of bead wire (8), the radial distance (a1, a2) is at least equal to 0.5 times the section height H of the tire and the radial distance (b3, b4) is at most equal to diameter D of bead wire (8).

The crosslinkable rubber composition comprises a first elastomer consisting of polybutadiene having a Mooney plasticity ranging from 40 to 70 Mooney units, the content of the first elastomer being strictly greater than 50 phr, a second elastomer, and a carbon black having a specific surface area within a range of values extending from 15 m.sup.2/g to 25 m.sup.2/g and an oil adsorption number of compressed sample (COAN) within a range of values extending from 65 ml/100 g to 85 ml/100 g.

Disclosed is a tire (1) which comprises: a bead core (10); a first bead filler (20); a first carcass (30); a second bead filler (40); and a rubber chafer (50) disposed at the outer side of the second bead filler (40) in the tread width direction. The second bead filler (40) covers a first bead filler outer end part (23) in the tread width direction, and a second bead filler inner end part (48) is disposed outside the bead core (10) in the tire radius direction. The rubber chafer (50) covers the second bead filler (40) in the tread width direction, and the loss tangent of the second bead filler (40) is smaller than the loss tangent of the rubber chafer (50).

A pneumatic tire having a designated orientation for mounting to a vehicle includes a tread, sidewalls, beads including bead cores, respectively, and a carcass including a carcass ply. Each bead includes a rubber apex, an outer bead and an inner bead, the rubber apex includes an outer apex portion and an inner apex portion, the outer apex portion includes a first outer apex portion positioned inward from the carcass ply in the axial direction and a second outer apex portion positioned outward from the carcass ply in the axial direction, the inner apex portion includes a first inner apex portion positioned inward from the carcass ply in the axial direction and a second inner apex portion positioned outward from the carcass ply in the axial direction, and the second outer apex portion has height which is greater than height of the second inner apex portion in the radial direction.