52mm Formula Four 101DU Classics Spitfire Skateboard Wheels Natural / Green • Spitfire Team Wheels• 52mm• 101DU hard skateboard wheel• Classic shape• Natural urethane• Set of Four• Formulated for a harder-faster ride• Unmatched flatspot resistance• Smooth anti-stick slide• More speed and control• 100% True performance urethane More from Spitfire at Slam City Skates More Skateboard Wheels Spitfire 52mm 101DU Formula Four Classics Skateboard Wheels Natural /