How to Tell If Tires Are Old or New: Easy DOT Code & Wear Guide

Learn how to identify if your tires are old or new by reading the DOT code and inspecting tread wear, cracks, and damage.

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To determine if tires are old or new, check the DOT (Department of Transportation) code on the sidewall. This code ends with a four-digit number representing the week and year of manufacture. For example, a code ending in '2520' indicates the tire was made in the 25th week of 2020. Additionally, inspect for signs of wear such as tread depth, cracks, or bulges, which indicate aging regardless of the manufacture date. Fresh, deep treads and a lack of damage generally point to newer tires.

FAQs & Answers

  1. How do I find the manufacture date on my tire? Check the DOT code on the tire sidewall; the last four digits represent the week and year of manufacture, e.g., '2520' means the 25th week of 2020.
  2. Why is it important to know the age of my tires? Tires degrade over time regardless of use; knowing the age helps ensure safety by preventing use of tires that might have dry rot, cracks, or weakened structure.
  3. Can tires be considered new if they have been stored for a long time? Even if unused, tires stored for many years may age and develop cracks, making them less safe than newly manufactured tires.
  4. What signs besides the DOT code indicate tire aging? Look for tread depth, cracks in sidewalls, bulges, or dry rot, which are physical signs of tire aging and wear.

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