American Roadstar A/S refined steering, jointless spiral-wound cap ply for maximum refinement, Responsive and direct, Grooves designed to minimize noise, Solid center rib design for stability at high-speeds, Design to work for all seasons. The Central longitudinal continuous main rib, provides straight driving stability and high-speed controllability,ensuring safety. While the Twin longitudinal main grooves with 3D groove walls are effective in preventing hydroplaning in wet road, and reduce noise. The Continuous blocks ensure efficient ground contact area,providing extreme control of stability. With the advanced design concept? silica compound and 3D sipe distribution? American Roadstar A/S provides reliable grip and excellent braking performance in wet and dry conditions. The 3D sipe design of snow pattern?improve the all-weather performance of the tire.