Tires: travel trailer tires, dot code, travel trailer

Question
my used 1998 travel trailer has goodyear marathon tires. i am unable to indetify the manufacture date. please advise

Answer
All tires sold in the US have a DOT code generally located near the bead of the tire.  The letters DOT will proceed 10=12 letters, numbers or a combination of.  The full DOT may be on only one side of the tire.  The last 3-4 number are the date codes.

If you will forward these numbers to me I will glad to help you interpret them.