Ricta Wheel Dynamics 54mm, 78a Clouds with glow in the dark urethane, white core, debossed and pad printed lettering. Wheel Diameter (Millimeters) 54Wheel Durometer/Hardness 78aRoad Surface (Millimeters) 18Wheel Width (Millimeters) 34 Ricta Clouds are the most diverse cruiser wheel family in skateboarding. Ricta Clouds 78a Skateboard Wheels Glow In The Dark 54mm