How long do tyres last? Age matters as much as mileage
8 min readBy Wheel Fit
The short answer Tyres wear out through mileage and degrade through age. A tyre with good tread that is ten years old is not a good tyre. Find the DOT code on the sidewall to see when yours were made.
Finding the age
Look for four digits after DOT, often inside an oval. The first two are the week, the last two the year. 1122 is week 11 of 2022.
The full code is only required on one side of the tyre, so if you cannot find it, look at the inner face. How to read a tyre sidewall covers where it sits among the other markings.
Why age matters
Rubber is a chemical compound and it changes over time. Oils migrate out, it hardens, and it becomes more prone to cracking — a process accelerated by UV, heat, ozone and being left standing under load.
A hardened tyre loses wet grip long before it looks worn out. This is why a low-mileage car that has sat outside for years can have a full tread depth and genuinely poor tyres.
Rough guidance
- Most manufacturers suggest inspecting annually from around five years.
- Many suggest replacement at around ten years regardless of tread.
- Caravans, trailers, classics and low-mileage cars are the usual candidates — they age out rather than wear out. See caravan and trailer tyres, where five years is the common recommendation.
- Spare wheels age too. A twelve-year-old space-saver is not a reassuring thing to be relying on — space-saver or sealant kit.
Where age is actually the law
Cars are not age-limited; some vehicles are There is no legal age limit for tyres on cars — the legal requirement is the 1.6mm tread minimum and that the tyre is in a fit condition. UK law does set a ten-year age limit on tyres in certain positions on heavy goods vehicles, buses, coaches and minibuses. If someone tells you your car's tyres are "illegally old", that is not a thing — but they may still be a bad idea.
What to look for on an older tyre
- Fine cracks in the sidewall or between tread blocks — often called crazing.
- A hard, shiny surface instead of slightly matt rubber.
- Deformation or flat spots from standing in one position for a long time.
- Any bulge, which means replacement now regardless of age — sidewall damage and bulges.
What actually determines mileage life
The honest answer is that there is no useful average, because it depends on: compound (a soft high-performance tyre may last a third as long as a hard touring one), driving style, whether pressures are maintained, alignment, and whether the car is front or rear wheel drive.
What you can control is pressure and alignment. Both have a bigger effect on tyre life than the brand on the sidewall.
| Factor | Effect | In your control? |
|---|---|---|
| Under-inflation | Shoulder wear, heat | Yes — check monthly |
| Alignment out | Rapid one-edge wear | Yes — get it corrected |
| Vehicle weight | Higher load, faster wear | Partly — EVs are heavier |
| Driving style | Hard cornering and braking | Yes |
| Compound / tier | Soft compounds wear faster | At purchase — budget vs premium |
| Standing and UV | Ageing regardless of use | Partly — storage matters |
Common questions
- How many miles should a tyre last?
- There is no honest single figure. Anyone quoting one is guessing, because compound, car weight, alignment and driving style each move it substantially.
- Should I buy a tyre that was made two years ago?
- A tyre stored properly does not begin its useful life until fitted, and a couple of years in a warehouse is normal. It is still worth checking the code — several years is a different proposition.
- My tyres have loads of tread but the car sat for years. Are they fine?
- Quite possibly not. Check the date code and look carefully for crazing and flat spots — how to tell if a tyre needs replacing.
- Does a nearly-new tyre still need replacing if it is old?
- If it is cracked or hardened, yes. Tread depth is a wear measurement, not a condition assessment.
Sources
Getting them checked
If you are not sure how old your tyres are, we will read the codes and assess condition while we are with you. Call 07989 606060. See also what uneven wear is telling you.
