Patent ID: 8550134

Claim:
A pneumatic tire comprising: at least one pair of parallel annular beads; at least one carcass ply wrapped around said beads; a tread; first and second sidewalls disposed between said tread and one of said at least one pair of beads; and a crown reinforcing structure disposed between said at least one carcass ply and said tread in a crown area of said tire, said crown reinforcing structure comprising: a first breaker between the at least one carcass ply and the tread; a second breaker between the tread and the first breaker; a third breaker between the tread and the second breaker; a fourth breaker between the tread and the third breaker; a fifth breaker between the tread and the fourth breaker, wherein the fourth and fifth breakers form a pair of working breakers, and wherein the first breaker is a split breaker comprising two circumferential strips essentially adjacent to the shoulders of the tire, each strip having an axial width comprised between 50% and 70% of the half tread width; and wherein the first breaker has an angle comprised between 40° and 80° with respect to the equatorial plane of the tire, and the second and the third breakers have angles comprised between 0° and 4° Left or between 0° and 4° Right respectively with respect to the equatorial plane of the tire and the fourth and the fifth breakers have essentially opposite angles comprised between 30° and 75° with respect to the equatorial plane of the tire.