303 Firecrest Tubeless wheels are designed for the real world… a world of imperfect conditions, road surfaces, and elements where the bottom line is simple. Efficiency = speed. Redesigned with a purpose-made approach for the demands of modern bikes; with reduced wind resistance, rolling resistance, rider fatigue, and weight. The 303 is faster, lighter, and more capable over varied terrain—whether the surface is pavement in all its conditions or no pavement at all.