The U.S. Department of Transportation (DOT) has made it very easy to find union-made tires by requiring that each tire carry a code that shows the company and the location of the plant that manufactured the tire. DOT requires that each tire sold in the United States carry a code that looks something like this: DOT BE XX XXX XXX. The two letters or numbers that follow the DOT identify a particular factory as listed below. Download a PDF of the list here: https://unionlabel.org/2020/12/07/do-buy-november-december-2020-union-made-tires/