Wheels you can trust, these Spitfire Bighead wheels were hand poured and made in the USA and are guaranteed against defects, which is something that definitely inspires confidence. The 99a Duro makes this an all-around good wheels with a nice balance of speed and grip. They're great for beginners, skate parks, ramps, pools, and other smooth surfaces. The treaded surface provides improved grip and traction on smooth surfaces. With Spitfire's Bighead graphic, these are sure to make a statement at the park. Comes in a set of 4, ready to complete your skateboard.