Vulkaneo
What the DOT code on a tire means and why it matters
On every tire's sidewall, usually in an oval recess, sits the DOT marking. Most drivers never look at it — yet it answers the most common question: "how old is this tire?"
How to read it
The last four digits are the key: first two are the production week, last two the year. 3226 means week 32 of 2026; 0525 means week 5 of 2025.
When a tire is too old
Manufacturers speak of six years as the inspection limit and ten as absolute — regardless of tread. A tire ages even when not driven: the compound oxidises, sidewalls crack.
Why it matters at sale
A customer buying a "new" tire deserves to know its production year. A three-year shelf-aged tire is not defective, but it is not "new" as the customer imagines. Say it upfront — no surprises, no forum reviews.
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