Ricta Wheel Dynamics 57mm Clouds in transparent green with glow in the dark green core, debossed and pad printed lettering. Super-soft urethane for cruiser setups and general transportation. Ricta Clouds are the most diverse cruiser wheel family in skateboarding. With sizes from 52-60mm and 78a, 86a, and 92a durometers, Ricta makes a soft wheel for any terrain or setup. All Ricta skateboard wheels are sold as sets of 4. Features: Diameter: 55mm Durometer: 78a Width: 34.5mm Road surface : 21mm