Ricta Clouds White / Red Skateboard Wheels - 55mm 86a (Set of 4) 55mm CLOUDS 86a Wheels. Ricta 86a Clouds are perfect for rolling on rough surfaces that would be difficult or impossible to skate with regular hard wheels. Excellent for ditches and rough street spots, 86a Ricta Clouds are a bit harder than our softer 78a Clouds. They still handle like a street/park wheel and even slide well. Ricta 86a Clouds are an excellent hybrid wheel for rugged spots.