These brand new Acid Chemical wheels are built to last! Coming in at 55mm in diameter and 86a in hardness, these bad boys are ready for action and packed with steez. Acid Chemical Wheels Pods Conical Green Skateboard Wheels - 86a 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 Warehouse Skateboards sells those too? We're not all wheels, and there's plenty of wood to go around.