Spitfire Formula Four Conical 101a Wheels are the newest wheel by Spitfire.
Tested by Spitfire Team riders, Formula Four Performance Urethane lasted 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. 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.
