A manufacturing method in which a mass of aluminum alloy is shaped by applying pressure with a huge press machine. Since the internal structure of the metal is dense, high strength can be secured, and the thickness can be reduced accordingly to reduce weight. It is often used in harsh environments such as motor sports because it can achieve light weight and high rigidity that are ideal for aluminum wheels. On the other hand, the manufacturing cost is high and the price is high.
In the current general manufacturing method, melted aluminum alloy material is poured into a mold and molded. It is possible to make products with various designs, and since it is suitable for mass production, costs can be kept down. Recently, an increasing number of manufacturers are using their own technology to improve rigidity. Most of the aluminum wheels on the market are of the “cast” type.