Seismic Skate Systems Blast Wave Mango Defcon Skateboard Wheels - 78mm 78.5a (Set of 4) One (1) set of 78mm Seismic Skate Systems Blast Wave Mango Longboard Skateboard Wheels - 78.5a; includes four (4) wheels Diameter: 78mm Durometer: 78.5a Color: Mango Does not include bearings.