The latest from spitfire the gonz classic signature wheelthis 60mm wheel is a clasic remake of the old school style wheelspitfire 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 60mmwidth 40mmriding 22mmhardness 99aride the fire