These brand new Spitfire Wheels wheels are built to last! Coming in at 55mm in diameter and 101a in hardness, these bad boys are ready for action and packed with steez. Spitfire Wheels Formula Four Lock-Ins White / Red Skateboard Wheels - 101a 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 55mm Spitfire Wheels Formula Four Lock-Ins White / Red Skateboard Wheels - 101a; includes four (4) wheels.