1-piece wheels - This is the most common type of aluminum wheel. The casting of wheels is the process of getting molten aluminum inside a mold to form a wheel. There are different ways this can be accomplished and although it sounds simple, this is truly an art when done properly.
2-piece wheels - These are made from a cast or billet center welded into a spun forged barrel. This type of wheel weighs less than a 1-piece wheel and comes in a variety of offsets.
3-piece wheels - This type of wheel utilizes two or three components assembled together to produce a finished wheel. The rim sections for 3-piece wheels are normally spun from disks of aluminum. Generally, spun rim sections offer the ability to custom-tailor wheels for special applications that would not be available otherwise. The rim sections are bolted to the center and normally a sealant is applied in or on the assembly area to seal the wheel.