Introducing the new 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