Delivering the latest in skateboard wheel technology, Spitfire introduces their popular Formula Four wheels in a radial-shaped 54mm diameter with a special Soft Sliders 93a durometer to take on the roughest terrain. That crusty, gritty street spot that wasn't feasible to skate in the past will transform into a noticeably smooth experience thanks to the softer durometer, flatspot-resistant urethane. Providing a wider cut than classic wheels, the radial-shaped Soft Sliders display subtle branding and a flaming stripe on the sidewalls for a timeless look.