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HOW TO READ DOT IDENTIFICATION

The Department of Transportation (DOT) marking is your tire's identification number. Think of it as a birth certificate for your tire. It shows the plant where your tire was manufactured, along with the week and the year it was manufactured.

DOT SAFETY CODE TRANSLATION
DOT example

DOT: Department of Transportation
B6: Plant Code
3T: Optional code for size
OP11: Dimensional code (sculpture)
1214: Week and year produced