Spitfire Wheels Formula Four Skateboard Wheels. Engineered for precision and durability, these wheels feature Spitfire's exclusive Formula Four urethane compound that promises unmatched speed, control, and resistance to flatspots. Perfect for skaters who demand the best in resilience and grip through every turn and trick. Whether you're hitting the streets or the park, Spitfire Formula Four Wheels are designed to elevate your ride and withstand the toughest skating conditions. Choose Spitfire and ride the best.