The U.S. Department of Transportation requires that all tires sold in the United States Carry a code which shows, among other things, the company and the plant that made the tire.

The code would look like this:

DOT AC L9 ABC 036

The two sympbols ( either two letters or a letter and a number ) which follow " DOT " indicate the company and the plant where a tire was manufacuted. Following are the codes for the four Goodyear Tire Plants in the USA.

 LOCAL

PLANT 

CODES 
 Local 831  Danville, Virginia

JE, MC, or PT
  Local 12  Gadsden, Alabama

JJ, MD or PU
  Local 307  Topeka, Kansas

JN, MJ or PY
  Local 878  Union City, Tennessee

JT, MK or TA

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