Written by the fitting team at 24/7 Mobile Tyre Services, Glasgow. Last reviewed: July 2026. We re-check the tyre age regulations against gov.uk annually.
Here is the paradox that brings people to this page. The tyres look fine. There is plenty of tread. And somebody has just told you they need replacing because of their age.
A tyre is a rubber product, and rubber has a shelf life. Tread depth measures wear. It tells you nothing at all about age.
A tyre that has sat through nine Scottish winters on a driveway can be perfectly legal, deep treaded, and still measurably worse in the wet than a new one. Both facts are true at the same time.
Quick answer: Tread depth measures wear, not age. Rubber hardens and cracks over time regardless of mileage. There is no legal maximum tyre age for ordinary cars in the UK, but manufacturers commonly advise having tyres inspected annually from around five years old and replacing them at around ten years, whatever the tread depth.
How to find out how old your tyres are, in 90 seconds
This is the single most useful thing on this page, and almost no driver has ever been shown it.
Find the DOT marking on the sidewall. The last four digits are the date of manufacture.
- First two digits = the week
- Last two digits = the year
So 3121 means week 31 of 2021. 0518 means week 5 of 2018.
If you find a three digit code, that tyre was made before 2000. If one is fitted to a car you drive, it is very long past time.
Three things real fitters know that will save you squinting:
- The full DOT code appears on one side of the tyre only. If you cannot find it on the outboard face, it is on the inboard face
- On some cars you will need the steering on full lock to see the inside face
- A torch and your phone camera, used as a mirror, gets you there in seconds
Check all five. That includes the spare. We will come back to that one, because it is the important bit.
What UK law actually says about tyre age
Precision matters here, because a lot of published advice on this gets it flatly wrong.
For ordinary cars, vans up to 3,500kg and motorcycles, there is no legal maximum tyre age. None. Anyone telling you a ten year old tyre on your hatchback is illegal has misread the rules.
There is a legal limit, but it applies to specific vehicles. From 1 February 2021 across England, Scotland and Wales, it is illegal to fit tyres aged 10 years or older to:
| Vehicle | Axle affected |
|---|---|
| Goods vehicles over 3,500kg maximum gross weight | Front axle |
| Buses, coaches and minibuses | Front axle |
| Minibuses with single rear wheels | Rear axle |
For those vehicles, the date code must also be legible. An affected tyre is a dangerous failure item at annual test and attracts an ‘S’ marked prohibition at a DVSA roadside check.
What applies to every vehicle, cars included: a tyre in poor condition, meaning cracked, perished, cords showing or bulging, is an MOT failure and a roadworthiness offence regardless of age or tread depth.
Read that carefully, because it is the whole point. Age does not fail an MOT. The condition that age produces does.
Those 2021 regulations followed years of campaigning after a 2012 coach crash in which a tyre nineteen years old was fitted to the front axle. That is the reason the rule exists, and it is worth knowing.
The four cases where age beats tread
1. The low mileage second car. Two thousand miles a year. Full tread at eight years old, and rubber that has been through eight Scottish winters of salt, frost and rain.
Common around Bearsden and Newton Mearns, where a second car does the school run and not much else.
2. The caravan, motorhome or trailer. This is the highest risk case in the country.
The vehicle stands on one spot under load for months. UV hits one exposed sidewall. Flat spots develop. Annual mileage is tiny, so tread depth tells you almost nothing.
Industry advice commonly points to replacement well before ten years on these. We covered what happens when it goes wrong in a caravan tyre failing on the A82.
3. The classic, weekend or track car. Garage storage genuinely helps. It does not stop ageing, it slows it.
4. The spare you have never used. Here is the one that makes people go and open their boot.
A ten year old space saver with full tread is probably the most common ageing tyre in Britain. Nobody checks it. And it is the one tyre you will fit at the worst possible moment, in the dark, in the rain, on a road you do not know.
Go and read the DOT code on your spare this weekend. Related: what to do when the spare is also flat.
How to tell an old tyre is actually finished
A five point inspection you can do yourself in a driveway.
- Fine crazing across the sidewall or in the tread grooves. The classic crow’s foot pattern
- Cracks at the base of the tread blocks, visible when you flex the tyre
- Hardness and a glazed look to the tread surface. Old rubber feels different under your thumbnail
- Deformation. Flat spots, bulges, uneven shoulders
- Behaviour. Longer stopping distances in the wet, more road noise, poor grip on cold mornings
That last one is the one drivers notice first without knowing why. A hardened compound simply does not key into a cold, wet surface the way fresh rubber does.
Inspection matters more than the birthday. A garage kept seven year old set may be completely sound. A nine year old set on a car parked under a tree on a west facing street may not be. Look at the tyre, not just the calendar.
What actually ages a tyre
- Ozone and UV. The two biggest factors by a distance, and both are far worse for a car parked outside all year
- Heat cycling and repeated flexing. Every journey warms and cools the compound
- Standing loads without movement. Caravans, stored vehicles, anything left on one spot
- Under inflation over time. Accelerates internal fatigue invisibly — it’s worth getting your tyre pressures checked regularly
- Contamination. Oil, fuel, solvents, and some driveway cleaners
- Salt. Of specific relevance in Scotland, where roads are salted for a good part of the year
Independent guidance from TyreSafe and manufacturers such as Michelin and Continental broadly agrees on these factors, even though the exact replacement timelines are recommendations rather than law.
So, replace or not?
A framework rather than a single number.
| Age | Condition | What to do |
|---|---|---|
| Under 5 years | Sound, adequate tread | Keep and monitor |
| 5 to 10 years | Sound | Inspect at least annually and at every service. Decide on condition, use and where the vehicle lives |
| 10 years or over | Any | Replace, whatever the tread. Manufacturer and industry advice, not law, for cars |
| Any age | Visible cracking or deformation | Replace now |
| Caravan, motorhome, trailer or spare | Any | Apply a shorter horizon than you would for a car |
One honest bit of cost framing. A set of tyres is one of the cheapest genuine safety upgrades a car can have. The difference shows up exactly once: in the wet, under braking, when you did not plan for it.
What to do with the ones you take off
Tyres cannot go in household waste. Your fitter should handle tyre disposal, usually for a small charge, and that charge should appear on the quote rather than as a surprise at the end.
Two things not to do. Do not sell or give away a perished tyre, and do not keep a spare you already know is a decade old. Both just move the problem to somebody who will not check.
A fitter’s note
There is a moment you only get from doing this job, and it is when an aged tyre comes off the rim.
A healthy tyre bead flexes. It has some give in it. An old one is stiff and unhelpful, the bead area feels brittle rather than springy, and you often see fine cracking appear at the flex point as it comes over the rim edge.
That is the tyre telling you what it would have done on a cold wet roundabout. You just get to see it in the daylight instead.
We photograph these when we find them. There is usually a DOT code in the same frame that explains everything.
FAQs
How do I check the age of my tyres? Find the DOT marking on the sidewall and read the last four digits. The first two are the week of manufacture, the last two are the year. So 2419 means week 24 of 2019. The full code is on one side of the tyre only.
Is there a legal age limit for car tyres in the UK? No. There is no legal maximum tyre age for ordinary cars, vans up to 3,500kg or motorcycles. A ten year limit applies to the front axle of heavy goods vehicles, buses, coaches and minibuses, and the rear axle of minibuses with single rear wheels.
Do old tyres fail the MOT? Not for age alone on a car. They fail for the condition age causes: cracking, perishing, bulging, exposed cords. In practice, an old tyre that has been outdoors for a decade often fails on condition — see our guide on what to do when your car fails the MOT on tyres.
How long do tyres last if you do not drive much? Low mileage does not preserve tyres, it just stops the tread wearing. Ozone, UV and standing loads keep working regardless. Low mileage cars are the most common case where age beats tread.
Are unused tyres still good after 10 years? An unfitted tyre stored properly, indoors, cool, dark and away from ozone sources, ages far more slowly than one on a car. Ten years is still beyond what most manufacturers recommend for fitting.
Should I replace my caravan tyres by age? Yes, and on a shorter horizon than a car. Standing loads, UV on exposed sidewalls and very low annual mileage make tread depth a poor guide. Check current manufacturer and caravan industry guidance for your specific tyres.
Does the spare wheel tyre go out of date? It absolutely does, and it is the tyre nobody checks. A full tread space saver made ten years ago is still a ten year old tyre, and it will be fitted at the worst possible time.
Are new tyres sometimes already a few years old? Yes, and it is worth checking. Tyres sit in distribution chains, and a “new” tyre can be a year or two old before it is fitted. Properly stored, that is not usually a problem. You are entitled to read the DOT code before it goes on your car, and any decent mobile tyre fitting team will show you.
Not sure how old your tyres are?
Send us a photo of the sidewall on WhatsApp and we will tell you the date.
If they do need replacing, we will fit them where the car already is. No garage trip, no waiting room.
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Message us on WhatsApp or call 07955 533000.
Related: tyre safety inspection, emergency tyre replacement, wheel balancing, puncture repair. Also worth reading: what to do when a garage says you need four new tyres and winter tyres in Scotland.
