Cooper CS5 Ultra Touring All Season Radial Touring Tire - 235/45R18 94W 3D MICRO-GAUGE GROOVES - These sipes are an innovative technology that allows the tread elements of the tire to interlock which stabilizes the tread: This maximizes tread contact with the road surface to grip the road better significantly in wet conditions and light snow resulting in superior handling and increased traction MORE SIPING AT HALF-WORN - The CS5 Grand Touring has 40% more and the CS5 Ultra Touring has 54% more sipe length remaining at half-worn than the previous generation tire (CS4): Therefore, at half-worn the CS5 will have more siping left aiding in performance and improving it's worn appearance WEAR SQUARE - This is a visual wear indicator so that as your tire wears the shape of the visual wear indicator will change allowing you to approximate the tread life remaining on your tires: Knowing the approximate tread life remaining on your tires can give you more confidence in your vehicle: If the inner and outer Wear Square is at different stages, this indicates a possible wheel alignment issue allowing you to seek professional service STABILEDGE - "Stabiledge" is the bumper strategically located in several grooves of the tire's tread which help stabilize the tread elements during driving conditions, enhancing the steering precision while providing a better feel for the road: The stabiledge feature also assists in keeping the grooves open at the "tire-to-road" contact area providing good traction NEW GENERATION COUPLED SILICA COMPOUND - The secret to any tires traction begins at the molecular level: Silica provides exceptional all-season performance, improves braking, reduces heat generated in the tire and lowers rolling resistance for better fuel mileage: Coopers unique blend of silica has up to four times more silica than the previous generation of premium all-season tires which dramatically increases this tires performance: The CS5 Touring will be the first to use Coopers new second generation coupled silica compound