American Roadstar Pro A/S. Fuel efficiency, Ride comfort in wet traction, Road handling and road manners, Predictability and ease of control, Minimal impact, Design to work for all seasons. The 4 wide longitudinal grooves provide good drainage performance, keep excellent handling performance in wet road. The Grooves with different thickness and sipes design can destroy water film to guarantee the drainage performance effectively , and reduce noise greatly , providing a comfortable driving experience.The middle portion continuous strong tire tread ribs can improve the steering stability and straight performance at high speeds, to ensure stability and security. The Closed slanted grooves can disturb the spread direction of noise to decrease noise. Closed slanted grooves also can provide stability during cornering. The Optimization of pitch width and sequence effectively reduce the noise resonance, resulting in a quieter ride.