A generic term used to describe any non-steel road wheel. The most common alloy wheels are cast aluminum. Technically, an alloy is a mixture of two or more metals. These wheels are known for their light weight and strength.

Wheels are usually made of aluminum alloy. These wheels improve appearance and are less prone to corrosion. They are lighter than similar steel wheels.

Many car wheels are pressed from thick sheets of steel, but alloys are cast from a variety of metals including magnesium, which is why dudes from the 1970s may still call them mags. All being well, alloys should be lighter to make the suspension work better, and stronger to cope with cornering forces of sports cars. But most people buy them simply because they look cool.