Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Compagnie Generale Des Etablissments Michelin

Eddy Baranger

Carlos-Manuel Dos-Santos

Guillaume Bacher

Benoit Buffetaud

Christophe Chebaut

Heavy goods vehicle tire, having a crown portion covered radially on the outside by a tread, this tread having at least two cut-outs, the central portion of the tread having a width Lc of between 35% and 70%, the crown portion comprising a reinforcement having at least two working layers having reinforcing elements, these reinforcing elements consisting of UHT-grade threads, having a mechanical breaking strength R satisfying the following relation: R&#x2265;(4180&#x2212;2130&#xd7;D), where D is the diameter of the thread expressed in millimetres, this tread being formed of at least two layers of superimposed material, the material forming the first layer with a breaking elongation of more than 600% at a temperature of 60&#xb0; C., this tread being such that, in the central portion, the cavity ratio per unit volume is not more than 10% and the surface cavity ratio as new is not more than 10%.

Heavy goods vehicle tire with improved endurance

Tire tread

Growing community of inventors

Clermont-Ferrand, France

Eddy Baranger