99a DurometerMore speed and control on all surfaces. Unmatched flatspot resistance. Smooth, anti-stick ride. High-rebound compound.

Formula Four UrethaneFormula 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.

Classic Shape –The original Spitfire wheel designed and shaped by the pros who ride them.

Set of four wheels.

• Hardness: 99D
• Size: 52mm