Spitfire 56mm 101DU Formula Four Classics Skateboard Wheels Natural / Blue • Spitfire Team Skateboard Wheels• 56mm• 101DU medium hard skateboard wheels• 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 56mm 101DU Formula Four Classics Skateboard Wheels Natural /