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. Bones REDS are manufactured to Bones Skate Rated specifications in a manufacturing facility dedicated to producing the highest quality skate bearings. They are inspected twice before being shipped to skaters and offer the greatest combination of performance, durability and low cost in the industry. Because they offer near Bones Swiss performance at a fraction of the cost, they have become the best selling bearings.