More Details on Spitfire Formula 4 Conical 101a Natural:
FORMULA 4 Unbeatable lasting performance SPITFIRE urethane. Fast as hell. Long lasting, abrasion resistance, smooth anti-stick slide with a controllable grip. Guaranteed.
CONICAL Full riding surface without the weight. Symmetrical, cut in sidewalls for speed, control and slide when you need it.
101a Durometer
