The Nokian Hakkapeliitta RSi is a new R speed category friction tire which can withstand different road surfaces and is well-suited for cars with ABS brakes and traction control/electronic stability systems.The Nokian Hakkapeliitta RSi takes studless winter tire safety to a new level. The R-Rated RSi's increased lateral grip and improved handling properties in deep snow, ice, and slush make the advanced Hakkapeliitta RSi the leading studless winter tire in the world.Driving Safety Indicator:Provides visual indication of tire wear in millimeters. Shark Tooth Brake Booster:The RSi's "Shark Tooth" Brake Booster siping has reduced the braking distance on snow and ice over 30% creating a new standard for winter tires. The RSI's new patented Wedge Siping has created a more stable and comfortable ride while greatly enhancing the tire's lateral stability, safety, and performance. Shark Tooth Sipe Activators for Braking Stability:Creates 1000's of wedges to improve handling and stability in rain, snow, ice, and high speed driving.Arrowhead Tread Pattern (directional):Expels water, snow, and slush while providing uncompromised lateral grip.Canola Oil Silica Rubber Compound Formula:Only environmentally friendly rubber compound continues to maintain winter properties in cold while providing excellent grip in wet weather.Driving Safety Indicator:Provides visual awareness of tire wear in millimeters.Jointless Nylon Belt:Helps prevent tread separations while providing smooth, comfortable ride.