Sold as a set of 4 wheels
Ricta Chrome Clouds have a wide variety of sizes and hardness to cover the range of surfaces and styles of skateboarding that exist. Chrome Clouds take the Clouds and adds a solid center set core to it. Giving the wheel's urethane more support resulting in a slightly better roll speed. You wouldn't ask a fish to climb a tree, why ask your wheels to do what they don't do best either?
The 54mm 78a Ricta Chrome Clouds are the softest wheel in the line up. Great for those rough concrete bigger crack and rough stuff wheel needs.