Patent ID: 7926528

Claim:
A tyre tread for heavy vehicles comprising a plurality of grooves opening on to a running surface, each groove having an average orientation and being defined by facing walls, these walls being connected together by a groove bottom, each groove being defined geometrically by a transverse profile when new obtained by intersecting said groove by a section plane substantially transverse to the average direction of the groove, wherein the transverse profile of a plurality of the grooves is represented by one mathematical function, this transverse profile having two end points located at the running surface, and having variable curvatures (K), the variation of said curvatures in the section plane being mathematically continuous in such a way that between the end points of the transverse profile there is no discontinuity in the curvature values of said curvatures, and the transverse profile is continuously concavely curved from one of the end points to the other end point.