Knowing how old your tyres are helps you identify age-related deterioration before it becomes a safety concern. This guide explains how to read a tyre date code, what cracking can mean, which condition checks to record, and when to arrange a professional inspection or replacement.
Overview
Tyres do not wear only through mileage. Time, heat, sunlight, moisture, storage conditions, under-inflation and vehicle use can gradually affect the rubber and internal structure. A tyre that still has visible tread may therefore deserve closer attention if it is several years old or shows damage.
The first step is to find the tyre’s date code. Most modern tyres use a four-digit code on the sidewall, usually following the letters DOT in markets where the DOT identification system applies. The final four digits identify the production week and year. For example, 2322 means the tyre was manufactured in the 23rd week of 2022. This is the production date, not the date it was fitted to your vehicle.
There is no single universal replacement age that applies to every tyre, vehicle or climate. Tyre manufacturers may set different inspection and service recommendations, and local inspection rules may also vary. Treat age as one part of the decision alongside tread, inflation history, damage, cracking, handling and the manufacturer’s guidance.
What to track
1. The tyre date code
Inspect both sides of each tyre where possible. The complete date code may appear on only one sidewall, so you may need to look behind the wheel or ask a tyre professional to confirm it. Record the code for every tyre rather than assuming all four were made together.
| Example code | Meaning | What to record |
|---|---|---|
| 0819 | 8th week of 2019 | Production week and year |
| 4521 | 45th week of 2021 | Production week and year |
| 2322 | 23rd week of 2022 | Production week and year |
If you find a three-digit date code, the tyre is from an older coding system. Do not try to infer the year from the code alone; have the tyre checked by a qualified professional and consider replacement, particularly if its history is unknown.
2. Tread and wear pattern
Check whether tread is wearing evenly across the tyre. Wear concentrated on one shoulder can point to alignment or suspension issues, while wear in the centre or both shoulders can be associated with incorrect inflation. Cupping, scalloping or isolated bald areas also warrant investigation. Use the vehicle manufacturer’s or local legal tread guidance, but do not rely on tread depth alone when the tyre is aged or damaged.
3. Cracking and physical damage
Look for fine lines in the sidewall, between tread blocks and in the grooves. Light surface marks may be cosmetic, but cracking that is deep, spreading, exposed to the inside of the sidewall, or accompanied by bulges or deformation should be assessed promptly. Never drive on a tyre with a bulge, visible cords, a deep cut, a puncture that has not been professionally repaired, or suspected internal damage.
4. Pressure and usage history
Record cold inflation pressures and compare them with the vehicle manufacturer’s recommendation, normally found on the driver’s door-frame label, fuel flap or handbook. The number printed on the tyre is generally a maximum or technical value, not necessarily the correct pressure for your car. For a repeatable routine, use the tyre pressure maintenance tracker.
Also note whether the vehicle is used for short trips, long motorway journeys, towing, heavy loads, frequent parking in direct sun or seasonal storage. These details help explain changes in condition and may affect how often the tyres should be inspected.
Cadence and checkpoints
A simple inspection schedule makes tyre age easier to manage:
- Monthly or before a long journey: check pressure, visible damage and obvious changes in tread or sidewall condition.
- At every seasonal wheel change: record tread condition, date codes, storage position and any cracking. Rotate positions only when permitted by the tyre and vehicle manufacturer.
- At routine servicing or inspection: ask for the inner sidewalls, valve areas and tread shoulders to be checked, especially if they are difficult to see at home.
- As tyres become older: arrange more careful, regular inspections in line with the tyre manufacturer’s advice. Some manufacturers recommend annual professional checks after a certain service age, often around five years, but the applicable guidance for your tyres should take priority.
When storing seasonal tyres, keep a note of which wheel was fitted where and protect the tyres from prolonged exposure to sunlight, heat, chemicals and moisture. The seasonal tyre storage guide covers practical storage checks.
Use a vehicle-by-vehicle log for households or fleets:
| Vehicle | Position | Brand and size | Date code | Condition | Next action |
|---|---|---|---|---|---|
| Example car | Front left | Record from sidewall | Record four digits | Even wear; no cracks | Recheck next month |
| Example car | Rear right | Record from sidewall | Record four digits | Shoulder wear | Check alignment |
How to interpret changes
Age without visible damage: do not dismiss the date code, but do not replace solely because the tyre has reached an arbitrary age. Check the manufacturer’s service guidance, usage history and inspection results.
Fine surface cracking: photograph and monitor it, then request a professional opinion if it becomes wider, deeper or more widespread. Cracking can progress differently depending on climate, storage and exposure.
Cracking with bulges, vibration or pressure loss: stop using the tyre if it is safe to do so and arrange an urgent inspection. These symptoms can indicate damage beyond what a visual check can confirm.
Uneven wear on an otherwise younger tyre: investigate pressure, alignment, balancing, suspension and driving conditions before fitting a replacement. Replacing only the tyre may not solve the cause.
Used tyres with no reliable history: confirm the date code and inspect them carefully before purchase. If the code cannot be read or the tyre’s condition is uncertain, the apparent saving may not justify the risk. When comparing premium and budget tyres, include age, condition and remaining service life rather than price alone.
When to revisit
Revisit this check monthly, before extended trips, during seasonal tyre changes and whenever the vehicle develops vibration, pulling, unusual noise or repeated pressure loss. Update your log whenever a tyre is moved, repaired or replaced. A new tyre should also be recorded with its date code so its service history starts with accurate information.
Before ordering replacements, confirm the approved size, load rating, speed rating and seasonal specification for your vehicle. The tyre size and rating guide can help you read the sidewall, while the fitment checker is useful when wheels are also being changed.
Finally, check manufacturer guidance and regional inspection requirements when they change, and ask a qualified tyre professional to assess any uncertainty. A practical next step is to photograph each sidewall today, record every four-digit date code, check pressures while the tyres are cold, and schedule the next inspection in your vehicle log.
