These brand new Spitfire Wheels wheels are built to last! Coming in at 58mm in diameter and 99a in hardness, these bad boys are ready for action and packed with steez. Spitfire Wheels Formula Four Classic Swirl White w/ Purple 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. Note: Bearings not included. Includes: One (1) set of 58mm Spitfire Wheels Formula Four Classic Swirl White w/ Purple Skateboard Wheels - 99a; includes four (4) wheels.