A forged wheel is manufactured from a billet, or a large square piece of solid metal. ... The manufacturing process results in a stronger wheel by eliminating cavities, porosity, and shrinkage. Due to its tighter grain structure, forged wheels are also mechanically stronger, ensuring better wear resistance over time. Forged wheels are custom built to order. Forged wheels are strong, dense, yet very light wheel that high performance car enthusiasts use for their cars almost exclusively.