Spitfire Formula 4 features more speed and control on all surfaces, unmatched flatspot resistance, smooth anti-stick slide, high rebound compound. 100% true performance urethane.
99A Duro is made for speed and lasting control on all surfaces. One of Spitfires most ridden duros worldwide.
Classic Full Shape: Wider version of the classic shape designed for lasting speed and more controllable slide.
56mm x 37mm with a 23mm riding surface and Formula Four 99A durometer
