DOT date codes and tire age

What “DOT” means here

US-bound tires carry a Department of Transportation identification sequence. Toward the end of that sequence is a four-digit date code on tires made in recent decades: the first two digits are the week (01–52/53), the last two are the year.

Example for illustration only: 2424 would indicate the 24th week of 2024. Always read the actual sidewall on the tire in front of you.

Why age matters

• Rubber compounds change over time with heat, UV, ozone, and storage conditions
• A tire can look “new” in tread depth yet be older inventory
• Vehicle manufacturers and tire makers publish guidance on inspection and replacement intervals — follow those sources

Practical shopping tips

Ask the retailer for the date codes on the specific set you will receive. Prefer transparent sellers who will confirm week/year before mounting. Storage history also matters; a licensed installer can help inspect for cracking, flat-spotting, and other issues.

We do not set a universal “must replace by” age on this site. Use OEM guidance, tire-manufacturer guidance, and professional inspection.