The present invention provides a tire which has at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler made of a vulcanized rubber composition comprising a natural rubber as a rubber component and having a difference between a dynamic tensile storage modulus E at 180 C. (A) and a dynamic tensile storage modulus E at 25 C. (B) {E(A)E(B)} of 2.0 MPa or more, the dynamic tensile storage moduli being measured under conditions of an initial tensile strain of 5%, a dynamic tensile strain of 1%, and a frequency of 52 Hz, and provides the tire excellent in achieving both the riding comfort in normal running and the durability in Run-flat running.

The present invention provides a tire which has at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler made of a vulcanized rubber composition comprising a natural rubber as a rubber component and having a difference between a dynamic tensile storage modulus E at 180 C. (A) and a dynamic tensile storage modulus E at 25 C. (B) {E(A)E(B)} of 2.0 MPa or more, the dynamic tensile storage moduli being measured under conditions of an initial tensile strain of 5%, a dynamic tensile strain of 1%, and a frequency of 52 Hz, and provides the tire excellent in achieving both the riding comfort in normal running and the durability in Run-flat running.

Provided is a pneumatic tire having both improved run-flat durability and excellent wet grip properties; the pneumatic tire including a rubber composition used in a tread part, and a rubber support layer having a gauge thickness in a specified range; the rubber composition including specified compounded amounts of natural rubber, a terminal-modified styrene-butadiene rubber, silica, and a thermoplastic resin, wherein the rubber composition is largely strain-dependent for the storage elastic modulus.

Provided is a pneumatic tire having both improved run-flat durability and excellent wet grip properties; the pneumatic tire including a rubber composition used in a tread part, and a rubber support layer having a gauge thickness in a specified range; the rubber composition including specified compounded amounts of natural rubber, a terminal-modified styrene-butadiene rubber, silica, and a thermoplastic resin, wherein the rubber composition is largely strain-dependent for the storage elastic modulus.

A run-flat tire has: a pair of bead cores; a carcass that straddles the pair of bead cores, and having end portions that are anchored on the bead cores; bead fillers that are made of resin and that extend from the bead cores along an outer surface of the carcass toward an outer side in a tire radial direction; and side reinforcing rubbers that are provided at tire side portions, and that extend in a tire radial direction along an inner surface of the carcass.

A wheel assembly for a surface vehicle is presented. The wheel assembly comprises a tire comprising an envelope structure which by its inner surface encloses a cavity. The envelope structure comprises an outer, surface-engaging side having a circumferential surface, and opposite side walls which are integral with and extend from the surface-engaging side. The sides walls by their free ends define an inner, rim-engagement side of the tire by which the tire is connectable to a wheel hub. Each of the opposite side walls comprises a surface pattern defining a suspension assembly within the side wall to thereby prevent stretching of the tire envelope towards its maximal volume when the envelope is compressed with gas, while allowing deformation of the tire envelope when loaded or depressurized such that the surface engaging side of the tire maintains a substantially constant contact with the surface.

A wheel assembly for a surface vehicle is presented. The wheel assembly comprises a tire comprising an envelope structure which by its inner surface encloses a cavity. The envelope structure comprises an outer, surface-engaging side having a circumferential surface, and opposite side walls which are integral with and extend from the surface-engaging side. The sides walls by their free ends define an inner, rim-engagement side of the tire by which the tire is connectable to a wheel hub. Each of the opposite side walls comprises a surface pattern defining a suspension assembly within the side wall to thereby prevent stretching of the tire envelope towards its maximal volume when the envelope is compressed with gas, while allowing deformation of the tire envelope when loaded or depressurized such that the surface engaging side of the tire maintains a substantially constant contact with the surface.

The present invention provides a tire which has at least one member selected from the group consisting of a side reinforcing rubber layer and a bead filler made of a vulcanized rubber composition comprising a natural rubber as a rubber component and having a difference between a dynamic tensile storage modulus E at 180 C. (A) and a dynamic tensile storage modulus E at 25 C. (B) {E(A)E(B)} of 2.0 MPa or more, the dynamic tensile storage moduli being measured under conditions of an initial tensile strain of 5%, a dynamic tensile strain of 1%, and a frequency of 52 Hz, and provides the tire excellent in achieving both the riding comfort in normal running and the durability in Run-flat running.

A tire includes: bead cores; a carcass; a bead filler that extends along an outer face of the carcass from the bead core toward a tire radial direction outer side; and side reinforcing rubber that is provided at a tire side portion, that extends in the tire radial direction along an inner face of the carcass, that decreases in thickness on progression toward the bead core side and toward a tread portion side, that has an end portion at the bead core side that overlaps with bead filler with the carcass sandwiched therebetween, and that has an elongation at break of 130% or above, wherein a thickness of the side reinforcing rubber at a midpoint between an end portion at the tire radial direction outer side of the bead filler running along the carcass, and the end portion is 40% to 80% of a maximum thickness.

A tire includes: bead cores; a carcass; a bead filler that extends along an outer face of the carcass from the bead core toward a tire radial direction outer side; and side reinforcing rubber that is provided at a tire side portion, that extends in the tire radial direction along an inner face of the carcass, that decreases in thickness on progression toward the bead core side and toward a tread portion side, that has an end portion at the bead core side that overlaps with bead filler with the carcass sandwiched therebetween, and that has an elongation at break of 130% or above, wherein a thickness of the side reinforcing rubber at a midpoint between an end portion at the tire radial direction outer side of the bead filler running along the carcass, and the end portion is 40% to 80% of a maximum thickness.