WEARING SURFACE FOR TYRES FOR WINTER CONDITIONS
A wearing surface for tyres, especially for use on icy roads, of the kind where the rubber or rubber mix is supplied with an admixture of friction improving materials. The friction improving materials constitute approximately 20-60 % by weight of the rubber mix, and consist of a mixture of crystalline chrysolite (olivine) powder and a metal powder, being for example a steel powder and/or a powder from an aluminium alloy, and if desired an additional friction supporting material having good binding force to the rubber mixture.