This package includes 1 set of wheels (4wheels) and 8 bearings. Spitfire Formula 4 features more speed and control on all surfaces, unmatched flatspot resistance, smooth anti-stick slide, high rebound compund. 100% true performance urethane. The Conical Full is a wider version of the Conical Shape. Wide riding surface, cut in sidewalls to decrease weight. A solid, controllable shape for all terrains. 58mm x 37mm, 101A. Amp bearings are the epitome of durability and speed. These high-quality ABEC 5 bearings are strong enough, fast enough, and more than resilient enough to help you carve or cruise your own path. With a thermally applied coating to enhance corrosion resistance and hardened steel balls for a higher Rockwell rating, these bearings will ensure long-lasting durability to keep you rolling. Including fritcion-free rubber shields pre-lubricated with Amp Synthetic Speed Oil.