Custom alloy wheels factory in China: What is an alloy wheel? Originally made popular in motorsports, where performance is the key industry drive, an alloy wheel is made from a mixture of metals or other elements. Typically, in the 1960s, alloy wheels were made by combining magnesium with other materials, hence the term “Mags”. These mag wheels really offered drivers a significant performance advantage, and were much better than the alternative aluminium alloys, which were having problems with consistency in the casting process. But as technology has advanced over the decades, aluminium alloy casting techniques have been developed and now …