1,209,356. Pneumatic tyre. MICHELIN & CIE (COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN), 23 Feb., 1968 [27 Feb., 1967], No. 9002/68. Heading B7C. A pneumatic tyre is characterized by its beads, each of which is reinforced by a single beadwire of circular cross-section the centre of which is no further from the surface of the heel of the bead than it is from the surface of its base. The surface of the heel may be conical or the surface of revolution of a circular arc.