The spitfire classic shape now in the stay lit glow in the dark colourway rated at a 80 durometer these wheels are designed for a smooth soft and speed lasting ridespitfire is the worlds 1 urethane for a reasonall spitfire wheels are hand poured shaped and specifically engineered in san francisco only the most advanced formulas and compounds are used for all wheelsspecificationsdiameter 56mmwidth 353mmriding 18mmhardness 80aride the fire