A tire having a pair of high strength sidewalls lying opposite one another, wherein each sidewall has a plurality of plies that are shaped during manufacture to have a series of pleats or corrugations formed therein and stretching from the tire beads radially outward along the sidewalls. Each of the series of sidewall corrugations includes a pattern of alternating inwardly extending depressions and outwardly extending projections that extend continuously around the tire. The corrugations provide the sidewalls with an integral structural reinforcement, whereby the tire is advantageously capable of providing run flat support and avoiding damage to the rim on which the tire is mounted. According to a preferred embodiment, the tire herein disclosed is ideally suited for use on a motorcycle rim.

A tire having a pair of high strength sidewalls lying opposite one another, wherein each sidewall has a plurality of plies that are shaped during manufacture to have a series of pleats or corrugations formed therein and stretching from the tire beads radially outward along the sidewalls. Each of the series of sidewall corrugations includes a pattern of alternating inwardly extending depressions and outwardly extending projections that extend continuously around the tire. The corrugations provide the sidewalls with an integral structural reinforcement, whereby the tire is advantageously capable of providing run flat support and avoiding damage to the rim on which the tire is mounted. According to a preferred embodiment, the tire herein disclosed is ideally suited for use on a motorcycle rim.

Durability of a pneumatic tire is enhanced by effectively promoting heat radiation by air cooling. A plural of projections are comprised on a surface of a tire side portion. The projection comprises a front side surface which is a side surface of a tire rotational direction side and an outer end surface which is a side surface of a tire outer radial direction side. The front edge portion intersects a straight line extending in a tire radial direction as viewed in a tire wide direction. A tip angle made by the top surface and the front side surface on the edge portion of the projection is equal to or less than 100. The outer end surface comprises a projection having an inclination side surface which is inclined in a tire rotating rivers direction toward a tire outer radial direction.

A pneumatic tire includes a plurality of projections formed on a surface of a tire side portion at an interval in a tire circumferential direction. A thickness of the projection is smaller than a width of a top surface of the projection in a tire circumferential direction. The thickness is a distance from the surface of the tire side portion to the top surface of the projection. The width of the projection is 10 mm or more. The interval of the projections is 3 times or more and 10 times or less as large as the thickness of the projection.

A run-flat tire includes a carcass, a tire side portion and a side reinforcement layer. The carcass bridges between a pair of bead portions. The tire side portion links between a bead portion and a tread portion. A carcass maximum width position of the tire side portion, at which the width of the carcass is at a maximum, is provided at the tire radial direction outer side relative to a position that is at 40% of the tire section height. The side reinforcement layer is provided at the tire width direction inner side of the carcass. A thickness of the side reinforcement layer at the position that is at 40% of the tire section height is not more than 65% of a thickness of the side reinforcement layer at the carcass maximum width position.

An anti-roll off assembly. The assembly comprises a band, a plurality of compression-resistant well filler assemblies and a coupler assembly. The band is configured to extend substantially around a circumference of a well portion of a wheel. The compression-resistant well filler assemblies are coupled to the band and are configured to be positioned against the well portion to block off respective volumes along circumferential portions of the well portion. The coupler assembly is configured to increase a tension force of the band and comprises a first trunnion, a second trunnion and a threaded member. The first trunnion is in contact with the band and has a first threaded opening. The second trunnion is in contact with the band and has a second threaded opening. The threaded member comprises a first end threadedly engaged with the first threaded opening and a second end threadedly engaged with the second threaded opening.

An anti-roll off assembly. The assembly comprises a band, a plurality of compression-resistant well filler assemblies and a coupler assembly. The band is configured to extend substantially around a circumference of a well portion of a wheel. The compression-resistant well filler assemblies are coupled to the band and are configured to be positioned against the well portion to block off respective volumes along circumferential portions of the well portion. The coupler assembly is configured to increase a tension force of the band and comprises a first trunnion, a second trunnion and a threaded member. The first trunnion is in contact with the band and has a first threaded opening. The second trunnion is in contact with the band and has a second threaded opening. The threaded member comprises a first end threadedly engaged with the first threaded opening and a second end threadedly engaged with the second threaded opening.

The tire maximum width in the reference condition is the center value or more and the upper limit or less of the tire maximum width specified in the standard, and the tire maximum width position in the reference condition is located at the position, with a distance of more than 50% of the tire cross-sectional height, outward in the tire radial direction from the bead baseline.

A tire fitted with a transponder comprises: a crown comprising a crown reinforcement having an axial end at each of its edges, connected at each of its axial ends by a sidewall to a bead having an interior end; a carcass reinforcement layer formed of parallel reinforcers, which is anchored in each bead around a bead wire to form a main part and a turn-up; and the transponder comprising a dipole antenna consisting of a spring defined by a pitch P and a diameter D. A ratio between the pitch (P1) and the diameter (D1) for a loop of a first region of the spring is greater than 0.8, and the transponder is situated axially on the outside of an interior end of the bead and radially between the upper end of the bead wire and the axial end of the crown reinforcement.

The reinforcing element (45) comprises an assembly (49) made up: of a multifilament strand made of aromatic polyamide or aromatic copolyamide (46) and of a multifilament strand made of polyester (48). The two strands (46, 48) are wound in a helix around one another, and the reinforcing element (45) is twist-balanced. The twist factor K of the reinforcing element (45) ranges from 5.5 to 6.5 where K is defined by the formula: K=(RTi.sup.1/2)/957 in which R is the twist of the reinforcing element (45) expressed in twists per metre and Ti is the sum of the counts of the multifilament strands of the reinforcing element (45) in tex.