Alloy wheels are wheels made from an alloy of aluminum or magnesium. Alloys are mixtures of a metal and other elements, which generally provide greater strength over pure metals, which are usually much softer and more ductile. Alloys of aluminum or magnesium are typically lighter for the same strength, provide better heat conduction, and often produce improved cosmetic appearance over steel wheels. The majority of wheels today are cast aluminum alloy, meaning they’re made by pouring molten aluminum into a mold. The manufacturing process for alloy wheels involves several steps, including melting the aluminum into a workable material, enamel casting, tilt milling, inspection, painting, and quality control. Steel wheels, on the other hand, are made with an alloy of iron and carbon. They are heavier but more durable and can be easier to repair and refinish.