![Spitfire X Sci-Fi Fantasy Jerry Hsu Formula Four Classic 52mm 99a](http://skateworks.com/cdn/shop/files/sf-cp-wh-f4-99-sci-fi-jerry-hsu-classic_large_abcae58d-ce7a-4eda-b8b9-3729f214a909_{width}x.jpg?v=1710618756)
Spitfire X Sci-Fi Fantasy Jerry Hsu Formula Four Classic 52mm 99a Skateboard Wheels (set of 4)
High Rebound Compound
Formula Four Urethane – Formula Four urethane is unlike any other. Both in the streets and under high-speed stress tests in Spitfire's lab, Formula Four wheels retained more material, coned less and kept their original shapes and sizes longer than any other wheel.