SKID AID
Annular tyre overlay (11) for drawing onto the rolling surface of tyres (40), which has a tread (17) on its outside and a gripping surface (15) on its inside, which tyre overlay (11) is so designed that contact between the rolling surface of the tyre (40) and the surfacing of the road is prevented by the tyre overlay (11) when the tyre overlay has been drawn onto a tyre. The said tyre overlay (11) is provided with a flange (21) which stops the tyre overlay (11) from shifting in the axial direction of the wheel. Advantageously, the tyre overlay is additionally stiffened by a flange (21) of planar form to keep the contact area on the surface below small.