A pneumatic tire includes a carcass ply that is wound up around a bead core from an inside to an outside in a tire axial direction; an inner metal reinforcing layer and an outer metal reinforcing layer that are wound up on an outside of the carcass ply from the inside to the outside in the tire axial direction; and a buffer layer that is provided between the inner metal reinforcing layer and the outer metal reinforcing layer, and is wound up from the inside to the outside in the tire axial direction. The buffer layer includes a rubber having a higher hardness than those of a carcass rubber configuring the carcass ply and a covering rubber configuring the inner metal reinforcing layer and the outer metal reinforcing layer.

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.

A pneumatic tire 1 having a toroidal carcass 6 extending from a tread portion 2 through a sidewall portion 3 to a bead core 5 in a bead portion 4, is provided in the bead portion 4 with a bead reinforcing rubber layer 10 along an outer surface in the tire axial direction of the carcass 6. The bead reinforcing rubber layer 10 is formed from a band-like rubber strip 15 wound spirally circumferentially of the tire. In a tire meridian section including the tire rotational axis, each of the inner surface Si and the outer surface So in the tire axial direction of bead reinforcing rubber layer 10 has adjacent rubber strip 15's interfaces 16, and the number of the interfaces 16 on the inner surface Si is smaller than the number of the interfaces 16 in the outer surface So.

Aircraft tire (1) comprising two beads (2). In each bead (2) portion (8) comprises surface layer (9) in contact with rim (3) via radially interior bead face (4) and having a shear stiffness K.sub.1. Portion (8) comprises a rigid layer (10), radially on the outside of and adjacent to the surface layer (9), having a shear stiffness K.sub.2 at least equal to five times the shear stiffness K.sub.1 of the surface layer (9), and a deformable layer (11), radially on the outside of and adjacent to the rigid layer (10) and radially on the inside of and adjacent to the carcass reinforcement portion (5) radially on the inside of the bead wire (7), having a shear stiffness K.sub.3 at most equal to 0.3 times the shear stiffness K.sub.1 of the surface layer (9).

Tire comprising two beads comprising a bead wire and a carcass anchored around the two bead wires by turning back, a squat filler of small height, a sidewall stiffening reinforcement which is metallic, an outer strip of soft rubber compound, placed axially on the outside of the carcass and of the filler, and a protective layer of rubber compound, wherein the assembly formed by the stiffening reinforcement and the outer strip has a thickness EB(R) and the protective layer has a thickness EE(R), R being the distance with respect to the radially innermost point of the bead wire, and wherein the thicknesses EB(R) and EE(R) satisfy a set of geometric conditions.

A pneumatic tire includes: a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions. The tire is embedded with a transponder covered with a covering layer. A modulus M50 (0 C.) at 50% deformation at 0 C. of the covering layer is in a range of from 0.5 MPa to 2.0 MPa, and a modulus M50 (20 C.) at 50% deformation at 20 C. of the covering layer and the modulus M50 (0 C.) at 50% deformation at 0 C. of the covering layer satisfy a relationship 1.0<M50 (20 C.)/M50 (0 C.)2.5.

A pneumatic tire includes: a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions. The tire is embedded with a transponder covered with a covering layer. A modulus M50 (20 C.) at 50% deformation at 20 C. of the covering layer being in a range of from 0.4 MPa to 1.5 MPa, and the modulus M50 (20 C.) at 50% deformation at 20 C. of the covering layer and a modulus M50 (100 C.) at 50% deformation at 100 C. of the covering layer satisfying a relationship 1.0<M50 (20 C.)/M50 (100 C.)2.5.

A heavy-duty pneumatic tire includes a carcass ply including a main portion extending between bead cores and a pair of turn-up portions, a first reinforcing layer of a steel cord disposed in each bead portion in a U-shaped manner, and a second reinforcing layer of an organic fiber cord disposed in each bead portion and at least a part of the second reinforcing layer extending in a radial direction of the tire at an axially outward location of the first reinforcing layer. The second reinforcing layer includes an axially inner second ply and an outer second ply. The outer second ply has an inner end positioned below the bead core. The inner second ply has an inner end located axially inward of the inner end of the outer second ply, and has a substantially same length as the outer second ply in a tire cross-section.

Provided is a run-flat tire. A first bead filler is disposed on an outer circumferential side of a bead core, a second bead filler is disposed on an outer side in a tire width direction of a turned up portion of the carcass layer along the turned up portion of the carcass layer, and a thickness G on a first reference line of a side reinforcing layer, a thickness G1 on a second reference line of the side reinforcing layer, and a thickness G2 on a third reference line of the side reinforcing layer satisfy the relationships of 0.8GG11.0G and 0.5GG20.7G.

A pneumatic tire includes: a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on both sides of the tread portion; and a pair of bead portions disposed on an inner side in a tire radial direction of the sidewall portions. The tire is embedded with a transponder covered with a covering layer. A modulus M50 (0 C.) at 50% deformation at 0 C. of the covering layer is in a range of from 0.5 MPa to 2.0 MPa, and a modulus M50 (20 C.) at 50% deformation at 20 C. of the covering layer and the modulus M50 (0 C.) at 50% deformation at 0 C. of the covering layer satisfy a relationship 1.0<M50 (20 C.)/M50 (0 C.)2.5.