gForce Rival S 1.5 – Now Available in 18″ & 19″ Rival S 1.5 — The same proven Rival S compound introduced in 2015 with enhanced internal construction to improve turn-in and transitional response during autocross competition. Rival S 1.5 is SCCA Solo legal in 13 sizes across 15″-19″ rim diameters. See the preview in […]