An insert for a vehicle wheel suitable for being inserted in an inner annular cavity resulting between a tire and a rim of the vehicle wheel is provided. The insert has an annular element that extends in a circumferential direction (C) about a main axis (X-X), and is made in one piece of polymeric material. Dips or protrusions formed on the annular element extend about the circumferential direction (C) and along a respective preferential extension direction (A-A), which lies on a plane secant to the circumferential direction (C). A vehicle wheel having a tire, a rim, and the insert suitable for being inserted in an inner annular cavity resulting between the tire and the rim of the vehicle wheel is also provided.

A run-flat tire includes a tire casing and a steel rim connected to an opening side of the tire casing to form a cavity, wherein a shock absorbing elastic component is provided along a radial direction in the cavity, one end of the shock absorbing elastic component is connected to the tire casing, and a gap is provided between another end of the shock absorbing elastic component and an outer wall of the steel rim. Specifically, a first annular shock absorbing cushion is provided along a circumferential direction inside the cavity, one end of the shock absorbing elastic component is fixed on the tire casing, and another end of the shock absorbing elastic component is fixed on the first annular shock absorbing cushion; a second annular shock absorbing cushion is provided along the circumferential direction on the outer wall of the steel rim.

A run flat device configured to be fitted to a tubeless mounted assembly for a motor vehicle, which includes a wheel rim and a tire cover including beads mounted against edges of the rim, the run flat device including: an annular supporting structure which is configured to be mounted around the rim so as to support the cover following a drop in inflating pressure inside the mounted assembly, including: three composite spring segments forming sectors in an arc of a circle assembled circumferentially around the rim forming the annular supporting structure by means of transverse pins whose shape geometry is asymmetrical; and an arrangement for locking the beads against the edges which are configured to connect the annular supporting structure to these beads.

An insert for a vehicle wheel suitable for being inserted in an inner annular cavity resulting between a tire and a rim of the vehicle wheel is provided. The insert has an annular element that extends in a circumferential direction (C) about a main axis (X-X), and is made in one piece of polymeric material. Dips or protrusions formed on the annular element extend about the circumferential direction (C) and along a respective preferential extension direction (A-A), which lies on a plane secant to the circumferential direction (C). A vehicle wheel having a tire, a rim, and the insert suitable for being inserted in an inner annular cavity resulting between the tire and the rim of the vehicle wheel is also provided.