Spitfire Wheels presents the Formula Four Conical Yellow 99A Wheels On your mark get set shred These Spitfire Wheels feature the legendary Formula Four urethane mixture regarded as one of the best urethanes in the business. This formula gives the wheels outstandingly long-lasting ...Spitfire Wheels presents the Formula Four Conical Yellow 99A Wheels On your mark get set shred These Spitfire Wheels feature the legendary Formula Four urethane mixture regarded as one of the best urethanes in the business. This formula gives the wheels outstandingly long-lasting performance with extreme flatspot-resistance.
In addition the medium-hard 99A durometer urethane gives these wheels the optimum balance of slide-ability and grip on any terrain. These Formula Four Yellow 99A Wheels have a Conical shape. This shape allows you to easily lock into grinds on rails and ledges without excessive friction from the side of the wheel during the grind.
The result easier and longer grinds.