Spitfire - Formula Four 99D Radial Wheels (Natural)

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.

Radial Shape – Round edges, slim to medium riding surface offers a quick, responsive , round edge shape.