These brand new Bones Wheels wheels are built to last! Coming in at 53mm in diameter and 99a in hardness, these bad boys are ready for action and packed with steez. Bones Wheels STF V4 Retros White 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 53mm Bones Wheels STF V4 Retros White Skateboard Wheels - 99a; includes four (4) wheels.