The invention is directed to a pneumatic vehicle tire which includes a foam sound absorber in its interior, adhesively attached to the inner surface opposite from the tread and extending in an annular manner over the circumference of the tire. The sound absorber adheres to a previously applied, self-sealing sealant which, at least immediately after its application, has a tackiness required for the adhesive attachment of the sound absorber. The sound absorber is made up of a plurality of annular component sound-absorber elements that extend in the circumferential direction. Two directly adjacently arranged annular component sound-absorber elements are spaced apart from one another in the axial direction by a clear distance.

A tyre comprising an impermeable layer suitable to ensure the sealing under pressure of the air contained in the inner cavity of the carcass and a foam material with auxetic characteristics, which is housed inside the cavity and suitable to provide sound absorption.

A tyre comprising a layer suitable to ensure the sealing under pressure of the air contained in the inner cavity of the carcass and a foam material for sound absorption based on a polycondensate of polyphenolic compounds of natural or synthetic origins housed inside said inner cavity. Preferably, the foam material is based on flavonoid tannins.

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.

An insert specifically adapted for use with an off-road tire, such as an off-road tire of a motocross motorcycle, or an off-road bicycle. The insert includes an inflatable tube and a foam element which generally conforms to the contours of the off-road tire to provide support to the tire when the tube is inflated. The ability to deflate the insert facilitates installation of the insert between the wheel rim and off-road tire. When inflated, the insert occupies the space between the wheel rim and tire to support a load during use of the wheel.

The present invention relates to a soundproof tyre for vehicle wheels comprising a noise reducing element made by vulcanising a vulcanisable and expandable elastomeric compound comprising at least one elastomeric polymer, at least one expanding agent, and at least one compound selected from the group of (i) fatty acid amides and (ii) polymers and copolymers of caprolactone, lactic acid, glycolic acid, and mixtures thereof.

The pneumatic tires of this invention are of the tubeless type, are capable of self-sealing punctures made therein, and generate a low level of noise during use on a vehicle. These tires have a sealant/noise reduction layer which is disposed inwardly from the supporting carcass and which is typically the innermost layer of the tire. The sealant/noise reduction layer is comprised of a dispersed phase and a continuous phase, wherein the dispersed phase is comprised of a sealant material, and wherein the continuous phase is comprised of a foamed polymeric material.

A pneumatic tire comprises a tread portion extending in a tire circumferential direction and having an annular shape; a pair of sidewall portions disposed on opposite sides of the tread portion; and a pair of bead portions disposed inward of the sidewall portions in a tire radial direction; wherein a sound absorbing member is fixed via an adhesive layer to an inner surface of the tread portion along the tire circumferential direction, and the adhesive layer comprises a solid pressure-sensitive adhesive without including a base material.