QuestionI would like to know what year my tires were made I don't understand how when mine has letters and mumbers. One has USA 0813 Dot M67 EY-ER 0508 and one has M671 are these tires safe.
AnswerCarol,
Here's how to tell how old the tires are:
First locate the letters "DOT" on the sidewall of the tire. Nearby will be the DOT code. DOT codes are 10 to 12 digits long. BTW the digits can be numbers or letters.
The first 2 digits are a code for the manufacturing plant.
The next 2 digits are a code for the tire size.
The next 3 or 4 digits are a code for the type of tire.
The last 3 or 4 digits are the date code. The format is week/week/year/year or week/week/year. These are always numbers.
Starting in the year 2000, the date coding used was 4 digits. That means the largest number you should see for the year is 09. Before 1999 the format was 3 digits. 1999 and 2000 are transition years, so you will find both 3 and 4 digits.
The date code only has to be on one side – and it is permissible for there to be a partial DOT code, so long as one side has the complete code.
It looks like you have identified the DOT number:
M6 = Goodyear in Lawton, OK
7E = P255/55R20 (BTW, This might also be a 285/25R20)
YER = This would be a code the tire manufacturer would assign, so I can't translate it.
0508 = the 5th week of 2008 - early Feb 2008.
