Bias ply tires show diagonally crossed fabric layers in their substructure; resulting from this, the denomination of this tire design is dissipated. At normal tires of this type the cords main direction of the carcass fabric layers intersect the tires circumfernce line at a cord angle of 35° - 38°. In high-speed tire and racing tire the cord angle approximately amounts 26°.
The figure shows a bias ply tire with intersecting cords und four layers in it`s substructure. Depending upon the demands on strength, textile fibers or steel cords are used as material for the fabric layers.
Diagonally crossing layers of fabric in the cord casing
