Cooper ZEON RS3-S All-Season Radial Tire - 235/40-18 95Y Asymmetric Design: The asymmetric design allows for tread pattern tuning. This design allows for cross-rotation which reduces heal-toe wear, promotes even wear, less noise and increased overall tread life. The outboard tread pattern is tuned for excellent dry handling and traction. The inboard of the pattern is optimized for wet weather conditions. Dual pitch sequence provides a low tread pattern noise. Increased grooves create more void on the inside of the tread pattern which helps maintain better wet performance. Circumferential Grooves: Wide,circumferential grooves are positioned toward the inside of the tread pattern. This increases the size of the outside shoulder and the intermediate tread element rows which allows for more rubber on the outside of the pattern for ultimate dry traction, increased handling and exceptional cornering ability. The increased void and two circumferential grooves on the inside of the pattern channel water out of the tread for hydroplane resistance. Advanced technology mold profile provides for a square tread footprint which means more tread-to-road contact. Silica formulated tread compound is designed for exceptional wet driving performance, while promoting longevity.