Spitfire Formula Four Classic 93A 53mm burton Their “outside-the-lines” way of thinking

Their “outside-the-lines” way of thinking

Featuring breathable recycled PET textile uppers

Now with All-Trac cold weather rubber compound

This hi-tech approach is also reflected in the 1906R’s upper design

and park laps

Spitfire Formula Four Classic 93A 53mm burton Their “outside-the-lines” way of thinkingIntroducing the new Formula Four 93 Duro Soft Sliders. The most controllable and consistent sliding soft wheel out. Soft Duro combined w High Rebound compound absorbs more impact & vibrations easier on your body for longer sessions. 93 Duro Holds speed through even the roughest terrain. Reliable grip when you need it. Unmatched Formula Four flatspot resistance. Set of 4 Wheels