Spitfire Bighead Skateboard Wheels (48mm 50mm 51mm 52mm 53mm 54mm 57mm 59mm 63mm) One (1) set of 57mm Spitfire Wheels Bighead White / Light Blue Skateboard Wheels - 99a; includes four (4) wheels Diameter: 57mm Durometer: 99a Color: White / Light Blue 100% guaranteed authentic