How To Read Tire Date Code
without the guesswork.
Tire Replacement Age And Tread Calculator — Decode the DOT date code, apply the exact maker age limit and let tread, damage or performance concerns decide first. Includes a practical guide and embedded calculator. Inputs stay in your browser.
Tread, physical condition and performance can require action before the age line. The entered age limit comes from the user—not a universal federal expiration rule.
Context matters.
- NHTSA says tires are unsafe at 2/32 inch of tread and recommends monthly pressure, tread and damage checks.
- Cuts, cracks, bulges, irregular wear, pressure loss, noise or vibration require professional attention regardless of tread or age.
- Some vehicle and tire manufacturers recommend replacement at 6–10 years; follow the exact maker and owner-manual limit entered above.
Sources & scope
This page shows the source trail, jurisdiction and review date alongside the result. Always confirm time-sensitive rules with the linked authority.
What to know before using the result.
How do I read the tire's DOT date code?
Use the final four digits of the DOT Tire Identification Number: the first two are the manufacturing week and the last two are the year. For example, 0308 means week 03 of 2008.
Do all tires expire at six years?
No. NHTSA says some vehicle and tire manufacturers recommend replacement at 6–10 years regardless of tread. Enter the exact limit from the vehicle owner manual or tire maker.
What overrides the age date?
Tread at 2/32 inch, cuts, cracks, bulges, irregular wear, pressure loss, noise or vibration can require replacement or professional inspection regardless of age.