F1 Streetburners are a true flatspot resistant urethane that don't sacrifice the slide. The Spitfire F1 Streetburner Koston Kockfight Wheels are formulated to withstand any street terrain. A Pro Edition, Eric Koston Spitfire wheel. Survive the slide. 100 Duro. Sizes available as seen below. Available in colorways as seen below. Colors are limited to specific size. See colors below for correlating size. Wheels sold in set of four.