| abstract |
A pneumatic tire ( 10 ) comprises a radial ply ( 12 ) carcass, a tread portion disposed radially outwardly of the crown area ( 14 ) of the carcass and a crown reinforcing structure interposed between the tread portion ( 19 ) and the carcass. The crown reinforcing structure includes a belt assembly ( 15 ) having at least a first ( 16 ), radially innermost and a second ( 17 ), radially outermost belt ply as well as a textile overlay structure ( 18 ) which is superimposed radially outwardly to said belt assembly ( 15 ). The textile overlay structure is reinforced with cords ( 40, 51 ) being made of materials including nylon and aramid. At initial elongation of the cords, the primary load bearing yarns are the nylon yarns; after appreciable elongation the primary load bearing yarns are the aramid yarns. |