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. Formula Four's True lasting Performance Urethane comes not from a single benefit, but from a combination of qualities and features that together produce a truly great wheel, Formula Four Performance Urethane is unlike any other.
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
- 99a durometer
- Asymmetrically shape designed for Lock-In grinds