Spitfire Andrew Reynolds Formula Four 93A Soft Sliders wheels. Controllable smooth slide and reliable grip. Soft duro with high rebound compound absorbs more impact and vibrations. Unmatched F4 flatspot resistance. Holds speed over any surface. Classic Shape: The number 1 wheel shape in skateboarding. Medium width riding surface with round sidewalls. Designed for control in all situations. Features: Diameter: 54mm Durometer: 93a Width: 33.5mm Riding Surface: 16.5mm Color: Natural