These brand new Maurio McCoy Ricta wheels are built to last! Coming in at 54mm in diameter and 99a in hardness, these bad boys are ready for action and packed with steez. Ricta Wheels Maurio McCoy Geo Naturals Slim Skateboard Wheels - 99a are sold in (1) set of four (4) wheels. You know, because that's how many wheels you need on a skateboard. Speaking of skateboards, did you know that Skaters Advocate sells those too? We're not all wheels, and there's plenty of wood to go around.