Spitfire Formula Four 93D Soft Sliders Radial Wheels (56mm) Spitfire's new Formula Four 93 Soft Slider wheels have arrived! After almost five years in the making, these wheels are like nothing else on the market. The Spitfire Soft Sliders defy everything you knew about wheels by being soft and able to absorb vibrations on rough surfaces, but still able to powerslide rough ground and ledges.
