Spitfire Formula Four Conical 101a Wheels are the newest wheel by Spitfire. Tested by Spitfire Team riders, Formula Four Performance Urethane lasts longer, withstood more abuse and performed superior to all other wheels. Spitfire Formula Four Urethane was developed to combine all the desired properties of a performance wheel without sacrificing any one attribute at the expense of another. 

Specs:

• More speed and control on all surfaces
• Unmatched flatspot resistance
• Smooth anti-stick slide
• High rebound compound
• 100% true performance urethane
• Holds shape longer