The Cal 7 Polyurethane Skateboard Wheels for Longboard Cruiser 90x52mm 78A four pack offers a quality wheel for your street deck to keep the ride smooth and easy. 90x52mm wheels feature center set, 44.45mm hubs constructed of sturdy, impact-resistant plastic. Hub is wrapped in durable polyurethane to a depth of 19.05mm. Durometer rating of 78A, combined with the wheels extra width, makes for a steady, shock-absorbing ride. Hot colors coordinate or contrast with any board to add some style to your kit. Package of four (4).