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		SPIRAL WINDING Toyo's Z-rated tires use a special Spiral Winding construction to reduce noise and improve ride quality. To provide smooth ride quality and low noise in our H, Z and W speed-rated tires, Toyo engineers have developed a unique Spiral Winding technology. A continuous band of 15mm nylon cord is wound around the circumference of the tire over two steel belts to eliminate the overlap joint splice, common in conventional tire construction. This joint splice can reduce ride quality and high-speed stability. The New Toyo Spiral Winding Technique Provides Significant Benefits, Such As: Improved uniformity at high speeds. Increased high-speed endurance. More comfortable ride. Reduced noise level.