The latest from spitfire the formula four agent orange wheelspitfire is the worlds 1 urethane for a reasonths latest shredded wheel from spitfire is the classic shape with a new graphicall spitfire wheels are hand poured shaped and specifically engineered in san francisco only the most advanced formulas and compounds are used for all wheelsspecificationsdiameter 54mmwidth 335mmriding 165mmhardness 101ashape classicride the fire