The Stovebolt Site Forums The Shop Area General Truck Talk age of tires

I'll look and confirm, but I believe the codes are:

Four numbers - WWYY - two digits for week of the year made, and last two for year (post 2000).

or

Three numbers - WWY - where Y is the last digit of the year. These are pre-2000. I don't know how to tell of a 529 is the last week of 1999 or 1989.