Introducing Spitfire's Formula Four 93 Duro Soft Sliders!
- The most controllable and consistent sliding soft wheel out.
- Soft Duro combined w/ High Rebound compound absorbs more impact & vibrations - easier on your body for longer sessions.
- Holds speed through even the roughest terrain.
- Reliable grip when you need it.
- Unmatched Formula Four flatspot resistance.