The G-Force R1 S (S for Sprint) radial is BFGoodrich's Racetrack & Autocross Only special-use DOT-legal racing tire designed for drivers of race-prepped vehicles looking to run their quickest times in autocross, sprint race and time attack events. Offering more ultimate dry grip, G-Force R1 S tires come up to temperature quicker and provide more grip in cooler ambient temperatures on tracks that are easier on tires (compared to the standard G-Force R1). The G-Force R1 S will wear quicker than the standard g-Force R1 tires and are not as well suited for extremely hot days. While G-Force R1 S radials meet DOT requirements, they are not appropriate for highway use. G-Force R1 S radials are not recommended for driving in wet conditions.