The Ricta Wheel Dynamics Clouds GITD Red 55mm, 78a features glow in the dark sky blueurethane and core debossed and pad printed lettering. Soft 78a urethane: Perfect for cruising, filmer setups, skating ditches and rougher terrains. About Clouds 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. Ricta Clouds – Soft Skateboard Wheels For Every Terrain All Ricta skateboard wheels are sold as sets of 4. Features: Diameter: 55mm Durometer: 78a Width: 34.5mm Road surface : 21.mm