Tyre age is a useful question, but it is not a magic pass-or-fail number. A sensible tyre decision combines the date code with tread, sidewall condition, repairs, storage history and the vehicle manufacturer’s recommendation. The sidewall gives you a starting point; it does not replace an inspection.
Where to find the date code
Michelin’s tyre-marking guidance explains that the date code appears at the end of the TIN/DOT marking and uses four digits. The first two represent the production week and the last two the year. For example, a code ending in 4724 indicates the 47th week of 2024. The full marking may be visible on only one sidewall, so a tyre may need to be turned or the car positioned differently to see it.
Why buyers should check it
If you are buying replacement tyres, the code helps you ask an informed question about stock rotation and storage. If you are inspecting a used car, it lets you compare tyre age with the car’s mileage, service history and visible wear. A very new tyre is not automatically better if it is damaged; an older-looking tyre should not be judged only from its date stamp either.
Inspect more than four digits
- Check tread-wear indicators and tread depth across the width of the tyre.
- Look for cuts, bulges, cracking, puncture repairs and uneven shoulder wear.
- Confirm size, load index and speed rating against the vehicle specification.
- Ask whether tyres on the same axle are the same type and size.
- Have a trained tyre professional assess anything unusual.
Do not use the sidewall maximum as your daily pressure
The maximum pressure printed on a tyre sidewall is not necessarily the pressure recommended for your vehicle. Use the vehicle manufacturer’s door-jamb label, fuel-flap label or owner’s manual for the correct cold pressure and loading conditions. That advice is specific to the vehicle, tyre size and expected load.
When a tyre shop gives a vague answer
Ask for the code to be pointed out, not merely described. Ask whether the tyre has been stored in a dry, protected environment and whether there is any sign of ageing or deformation. For a used car, include the spare in the inspection: it can be older than the four tyres on the ground and still be needed in an emergency.
The useful conclusion
The tyre date code is a conversation starter. It gives a week and year of manufacture; it does not tell you how the tyre was used, stored or damaged. Combine the code with a condition check and your carmaker’s recommendations, then make the final call with a qualified tyre professional.
Source: Michelin India tyre-marking guide.
