Spitfire's premium formula four urethane in an asymmetrical shape and design featuring a conical profile opposite a straight edge side. Lock on in.
- Spitfire X Grimple Stix Lock In Full
- Formula Four Urethane - Resists Flatspotting
- 54mm Wheel
- Set of 4.
- 99a Durometer
- Lock In Full Shape - A Wider version of the Lock In Shape
