A system and method for a tubeless tire insert. The present invention includes an annular body having shock absorbing characteristics. A positioning system configured to vary a mean inner diameter of the insert is also included. The insert has a mean inner diameter X when the tire is being installed on the rim, and the insert has a mean inner diameter Y when the tire is installed on the rim, where X is greater than Y.

A tire-wheel assembly includes a run-flat support member that is provided with a support surface formed on an outer circumferential side, and that is disposed on a rim in a cavity portion of a pneumatic tire, the run-flat support member being formed by connecting a plurality of foamed bodies in a tire circumferential direction with a band-like member, and being disposed in an annular shape on an outer circumference of the rim.

Provided is an insert for a tire, capable of being fastened together with a rim and a tire, the insert including a flow path connecting an upper surface and a lower surface of the insert.

A run-flat tire insert for installation in a pneumatic tire mounted on a rim. The insert is a one-piece toroidal member formed from expanded polymer foam beads molded into a structural foam part. The insert has an inner diameter surface sized to fit snuggly about a periphery of a tire rim and an outer diameter sized to fit within a tire cavity. The insert is spaced from the tire inner casing surface during normal operation and supports the tire inner casing surface away from the rim in the event of a flat tire. A molding apparatus and a method of forming a run-flat tire insert is also disclosed.

An insert for a pneumatic tire including an annular member adapted to contact at least 10% of an interior surface of the pneumatic tire and provide an outward pressure thereagainst.

A process for making a wheel assembly for a lightweight vehicle includes the steps of: (a) providing a wheel which includes a rim having a recessed outer surface, (b) disposing a foam tire core on the wheel such that an inner annular surface of the foam tire core is in abutment with the recessed outer surface of the rim, (c) applying an adhesive agent on at least one of an inner surface of a rubber casing and an outer annular surface of the foam tire core, and (d) wrapping the rubber casing on the foam tire core such that the inner surface of the rubber casing is brought into press engagement with the outer annular surface of the foam tire core.

Disclosed herein are kits for use in adding degradable foam to a tire, methods for preparing a degradable foam-containing tire, tires containing degradable foam, and methods for degrading the degradable foam in tires containing degradable foam. The degradable foam comprises a combination of (i) at least one di- or polyisocyanate, (ii) at least one polysiloxane diol, at least one polysiloxane diamine, or a combination thereof, and (iii) optionally at least one polyol.

A tire insert for vehicle wheel which has an annular element made in one piece of polymer material is provided. The annular element has a base portion suitable for being accommodated in a rim seat of a rim and an enlarged portion having a section larger than the base portion. The enlarged portion is shaped to have shape and size to always be spaced apart from an inner tire side when the tire is inflated to a predetermined standard working pressure. When the tire is deflated, the enlarged portion comes into contact with the tire to support the tire while the vehicle wheel is running. A vehicle wheel having a tire, a rim onto which the tire is mounted, and the tire insert is also provided.

Provided is a tire structure capable of being combined with a rim, and the tire structure includes an air tube, a core provided on the air tube, and a tire outer layer provided on the core, and the core includes a body part positioned above a transverse diameter of the air tube and a wing part positioned under the transverse diameter of the air tube, and a lower end of the wing part is placed under an upper surface of the rim.

A multi-layer or multi-section foam insert replacement for a pneumatic inner tube emulates the effect of air pressure, across a wide range of temperatures and pressures, while maintaining the weight of a conventional air-filled pneumatic tube. Through the use of different density materials and/or the orientation and thickness of such materials, desirable handling properties are achieved. The multi-layer/multi-section foam insert can be produced by steam molding or extrusion of foam materials.