- Formula Four Full Conical 52mm 99a Skateboard Wheels by Spitfire.
- Spitfire's Formula Four urethane design.
- Spitfire's Conical wheel shape and hard polyurethane core for a true bearing seating and speed.
- Unmatched flat spot resistance.
- Includes 4 urethane wheels.
- 52mm sizing.
- 99a durometer rating.
- 100% urethane.