Cooper CS5 Grand Touring Radial Tire - 185/60R15 84T Tire only New generation coupled silica compound provides exceptional all-season performance, improves braking and lowers rolling resistance. 3D Micro-Gauge grooves allow the tread elements of the tire to interlock and stabilizes the tread. Asymmetrical tread pattern reduces irregular wear by allowing tires to be rotated from one side of the car to the other.