A method of preparing a sidewall support, the method comprising the steps of (i) providing a vulcanizable composition including an elastomer, a filler, a curative, and a eutectic composition; (ii) fabricating the vulcanizable composition into a green sidewall support; and (iii) subjecting the green sidewall support to curing conditions.

A run-flat tire and method of manufacturing is disclosed with a pair of post-cure sidewall-stabilizing run-flat inserts. Each of the pair of post-cure sidewall-stabilizing run-flat inserts extends circumferentially about a rotational axis of a tire; includes a first terminating end, and a second terminating end, opposite the first terminating end; and is disposed on a radially inner surface of a sidewall of a tire such that the first terminating end terminates above the bead core and the second terminating end terminates along at least one of the sidewall and a respective adjacent shoulder.

A motorcycle pneumatic tire for travelling over rough terrain, wherein: the tire has a plurality of fin-like projections provided in the tire circumferential direction with intervals therebetween in an outer surface of the sidewall portion such that the fin-like projections each protrude from the outer surface and extend in the tire radial direction; a surface of at least the end portion on the outer side in the tire radial direction of each fin-like projection is formed to have an arcuate configuration protruding toward the tire inner surface side in a cross section in the width direction of the tire; and the arcuate surface of the end portion on the outer side in the tire radial direction of the fin-like projection is smoothly connected to an outer side surface of a shoulder block provided on the outermost side in the tire width direction of the tread portion.

A run flat tire 1 comprises a carcass 6 formed of a carcass ply 6A extending between a pair of bead portions 4 in a toroidal manner and a side reinforcing rubber layer 9 having a substantially crescent cross-sectional shape disposed on an inner side of the carcass at each of sidewall portions. steel cords 60 each including 1 to 4 filaments 61 having a strand diameter in a range of from 0.25 to 0.30 mm are arranged in the carcass ply 6A, and an outer diameter D of each of the steel cords 60 is not less than 0.62 mm.

A pneumatic tire is provided with a carcass layer and a sidewall rubber disposed on an outer side in a tire width direction of the carcass layer. Additionally, the pneumatic tire is provided with a resin coating applied on a predetermined region of a sidewall portion. Additionally, a minimum value of a wall thickness t of a rubber of the sidewall portion in the region applied with the resin coating is in a range of 0.05 mmt4.0 mm. Additionally, a thickness of the resin coating is in a range of 20 m or more and 300 m or less.

A side reinforcing rubber layer includes a second rubber portion having a modulus constant between a boundary surface and a bead portion and larger than a first rubber portion arranged on a tread-portion-2 side. The boundary surface intersects outer and inner surfaces of the side reinforcing rubber layer at first and third points, respectively. The first and third points are arranged on the bead-portion side of second and fourth points, respectively, which are closest points to an outer end of a belt layer of the outer and inner surfaces, respectively. A distance between an inner end of the first rubber portion and the second point is larger than a distance between the second point and the first point.

A pneumatic tire is provided with a carcass layer and a sidewall rubber disposed on an outer side in a tire width direction of the carcass layer. Additionally, the pneumatic tire is provided with a resin coating applied on a predetermined region of a sidewall portion. Additionally, a minimum value of a wall thickness t of a rubber of the sidewall portion in the region applied with the resin coating is in a range of 0.05 mmt4.0 mm. Additionally, a thickness of the resin coating is in a range of 20 m or more and 300 m or less.

A method of preparing a tire including the steps of: providing a cured tire, the tire including a first bead, a second bead, a carcass layer extending from the first bead to the second bead, and an optional innerliner layer disposed interior to the carcass layer; applying a pair of reinforcing members to the carcass layer or to the optional innerliner layer, if present; and applying an air barrier composition to the pair of reinforcing members, and to a portion of the carcass layer or to a portion of the optional innerliner layer to thereby form an air barrier layer.

A run flat tire having a side reinforcing rubber part is disclosed. The side reinforcing rubber part is formed by a rubber composition having a ratio (M50H/M50N) of tensile stress (M50H) in 50% elongation at a measurement temperature of 100 C. to tensile stress (M50N) in 50% elongation at a measurement temperature of 23 C. of from 1.0 to 1.3. Ratio (t.sub.b10/t.sub.p10) of 10% vulcanization time (t.sub.b10) at a vulcanization temperature of 160 C. of a rubber composition for a bead filler to 10% vulcanization time (t.sub.p10) at a vulcanization temperature of 160 C. of a rubber composition for a covering rubber of a carcass ply is from 0.5 to 1.0.