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.

Radial Shape: A round edge, medium width riding surface shape. Offers the versatility of the Classic shape and the width of a conical.

55mm x 34.5mm with a 21mm riding surface and Formula Four 99A durometer.