A radial tire has a pair of bead portions; a carcass which is toroidal and extends across the bead portions; a tread portion positioned at a crown portion of the carcass; and sidewall portions of the carcass, and at least one belt reinforcing layer is disposed at the entire tread portion and/or at both...http://www.google.de/patents/US5931211?utm_source=gb-gplus-sharePatent US5931211 - Radial tire with specified belt reinforcing layer cord
