These brand new Spitfire Wheels wheels are built to last! Coming in at 56mm in diameter and 90a in hardness, these bad boys are ready for action and packed with steez. Spitfire Wheels Sapphire 90DU Clear / Blue Skateboard Wheels - 90a 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 56mm Spitfire Wheels Sapphire 90DU Clear / Blue Skateboard Wheels - 90a; includes four (4) wheels.