These brand new Antonio Durao Spitfire-Wheels”Spitfire 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. Spitfire Wheels Antonio Durao F4 Lock-Ins Burn Squad 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.