SPITFIRE FORMULA FOUR APRIL YUTO CONICAL FULL 54MM 99D (Set of 4)

The Spitfire x April Yuto Horigome wheels put a two-time Olympic gold medalist's signature under your feet. This official collaboration pairs Yuto's exclusive graphics — the most decorated name in competitive street skating — with Spitfire's industry-leading Formula Four urethane. F4 is the pro standard: more speed and control on every surface, unmatched flat-spot resistance, a smooth anti-stick slide, and a high-rebound compound that keeps its shape and speed long after cheaper wheels mush out. Hand-poured and engineered in San Francisco, CA, it's a wheel that genuinely competes with anything on the market.

At 54mm, these run the Conical Full shape — one of the most popular shapes going. It combines a wide riding surface for stability and control with reinforced, cut-in sidewalls that lock in on ledges and rails while trimming weight for a lighter, more responsive feel. That makes it a dialed all-terrain choice: fast and confident across street, park, and rougher ground. The 99a durometer hits the versatile sweet spot — quick and slidey like a harder wheel, but forgiving enough for everyday pavement. Finished in a clean natural colorway. Sold as a set of four.

Specs:

• Diameter: 54mm
• Durometer: 99a (marked "99D" in Spitfire's branding)
• Shape: Conical Full (wide riding surface, reinforced cut-in sidewalls)
• Formula: Spitfire Formula Four (F4)
• Colorway: Natural
• Graphic: Yuto Horigome pro model (Spitfire x April collab)
• Made in: USA (hand-poured, San Francisco)
• Terrain: Street / park / all-terrain (ledges & rails)
• Brand: Spitfire Wheels
• Sold as: Set of 4

Need bearings, trucks, or hardware to finish a build? Grab them at checkout, or ask us in-store and we'll set you up.