evo.com | Spitfire Skateboard Wheels > Prepare to get radical on these conicals. The Spitfire Formula Four Conical Full 99a Skateboard Wheels have a ripping shape for shifting between the bowl and street thanks to a powerful urethane formula that provides a perfected balance of give and grip. 99a Durometer More speed and control on all surfaces. Unmatched flatspot resistance. Smooth, anti-stick ride. High-rebound compound. Classic Full Shape Wider version of Spitfire's classic shape designed for lasting speed and more controllable slide. | Spitfire Formula Four Conical Full 99a Skateboard Wheels 2026 - 58