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Spitfire Formula Four Conical 99a
Spitfires conical shaped skateboard allows you to go faster and have more control over your board without comprimising your weight. If you add that to their world class polyurethane compound you are looking at one of the most awesome trick skateboard wheels. As for picking a hardness just remember the lower the duro number (99a) the more they grip and the higher the number (101a) the better for grinds and slides.