How Old Are My Tires? We Can Help You Find Out!

If you need to find out how old your current tires are, start by reading its Tire Identification Number (often referred to as the tire’s serial number). Unlike vehicle identification numbers (VINs), Tire Identification Numbers are actually production codes that identify the week and year the tire was manufactured. 

Since 2000, the week and year the tire was produced has been provided by the last four digits of the Tire Identification Number. The first two digits being used to identify the week, while the last two digits tell the year.

Example of a tire manufactured since 2000 with the current Tire Identification Number format:

Tire Identification Numbers for tires produced prior to 2000 were based on the assumption that tires would not be in service for ten years. While they were required to provide the same information as today’s tires, the week and year the tire was produced was contained in the last three digits. The first two digits were used to identify the week a tire was manufactured, immediately followed by a single digit to identify the year.

While a tire might look like it has quite a bit of life left in it based on a visual inspection of the sidewalls and tread depth, it's important to keep the age of the tire in mind when considering the best time to replace your tires. For help on determining when the right time is to start shopping for new tires, read "When Should I Replace My Tires?"


Wednesday, August 28, 2013 by George Schadel

I would like to know when these tires I have were made. I'm trying to sell them and want to be upfront with people. Here is the tire ID number. DOT U9HR FF 1329< DO8R Thank you.
Thursday, August 29, 2013 by Doc

The code you supplied looks incomplete to me. Feel free to email me a picture of the entire string of numbers (
Thursday, April 16, 2015 by Lester

The DOT# on my tires are different from what is shown above. The tires are Firestone and were installed on my truck in 12/2009. The DOT #'s are VN9LD104509, and VN9LD104409. They have less than 25k miles on them but are showing cracks in the tread area. I don't know if they are safe or not.
Friday, April 17, 2015 by Doc

Your DOT codes indicate production on 45th and 44th week of 2009 for reference. Firestone's standard "aging" warranty is for four (4) years from the date of manufacture, so you are outside the warranty term for this issue. The cracks in the tread block are a safety concern to be sure. You may want to contact Firestone directly ( 1-800-367-3872) for more information.
Monday, May 4, 2015 by pam

my trailer tire says st22575R15 113L, can you tell me when it was made. If I'm figuring it right, is it Jan,13
Saturday, May 9, 2015 by Doc

Please look for a longer series of numbers that start with the letters DOT. Some trailer tires are not stamped with a DOT code however, so may not be possible to determine the age.
Thursday, June 4, 2015 by Heather

Hi! My trailer tires have the code JHCA B26. I can't seem to figure out how to read this. Is there another DOT number somewhere else? Thank you!
Saturday, June 6, 2015 by Doc

In many cases, the date code (last 4 digits) is only stamped on one side of the tire. You may want to check the other side of the same tire or one of the others for reference.
Saturday, September 30, 2017 by Alex Pan

My tires read dot 6Y6L WBLJ. They lack the 3 or 4 digits date code.
They are General Altimax RT43. How to tell the tire age?
Thursday, October 5, 2017 by Doc


The "complete" code is normally stamped on only one side of the tire, so the side you read only has the partial code. Check the other side of the same tire (or another tire) for the full story

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