The wheel hub, also known as the rim, is the barrel-shaped, center-mounted part of the tire that is used to support the tire. Common car wheels include steel wheels and aluminum alloy wheels. Steel wheels have high strength and are often used in large trucks; however, steel wheels are heavy in quality and have a single shape, which does not conform to today's low-carbon and fashionable concepts, and is gradually being replaced by aluminum alloy wheels. The advantages of JWHEEL aluminum alloy wheels are obvious: the density is small, about 1/3 of steel, which means that the same volume of aluminum alloy wheels will be 2/3 lighter than steel wheels. Statistics show that the quality of the vehicle is reduced by 10%, and the fuel efficiency can be increased by 6% to 8%. Therefore, the promotion of aluminum alloy wheels is of great significance for energy saving, emission reduction and low-carbon life.