24/09/2016
Driving on the road is a privilege, and with that privilege comes a responsibility to ensure your vehicle is in a safe and legal condition. Among the most critical components contributing to your vehicle's safety are its tyres. They are the sole contact point between your car and the tarmac, influencing everything from braking and steering to acceleration and fuel efficiency. Consequently, driving with tyres that do not meet legal standards is not only dangerous but also carries significant penalties. This article will delve into what constitutes illegal tyres, the repercussions of using them, and what steps you should take if you suspect your own tyres have fallen foul of the law.
What Makes a Tyre Illegal?
Several factors can render a tyre illegal for use on UK roads. The most common issues revolve around tread depth, tyre condition, incorrect tyre size or type, and improper repairs. Let's break these down:
Tread Depth
The legal minimum tread depth for car tyres in the UK is 1.6mm across the central three-quarters of the tyre's breadth. This tread is crucial for maintaining grip, especially in wet conditions, as it allows water to be channelled away from the contact patch. Tyres with tread below this limit are known as 'bald' tyres and offer significantly reduced grip, dramatically increasing stopping distances and the risk of aquaplaning.
Regularly checking your tread depth is essential. Most tyres have tread wear indicators (TWIs) – small raised bars in the main grooves. When the tread wears down to the same level as these indicators, it's time for a new tyre. You can also use a tread depth gauge, a simple and inexpensive tool, for a more precise measurement.
Tyre Condition
Beyond tread depth, the overall condition of your tyres is paramount. Tyres can become illegal due to:
- Cuts and Cracks: Deep cuts, gashes, or significant cracking on the sidewalls or tread can compromise the structural integrity of the tyre. These can lead to sudden blowouts.
- Bulges: Any bulging or blistering on the sidewall indicates internal damage, often due to impact. This makes the tyre extremely dangerous and liable to burst.
- Exposure to Chemicals: Prolonged exposure to oil, solvents, or other chemicals can degrade the rubber, making it brittle and prone to cracking.
- Perished Rubber: Over time, rubber naturally degrades. If your tyres look old, are covered in fine cracks, or feel hard and brittle, they may have perished, even if the tread depth is adequate.
Incorrect Tyre Size or Type
Tyres must be the correct size and type for your specific vehicle. This information is usually found in your vehicle's manual or on a sticker located in the driver's side door frame or fuel filler cap. Using tyres that are:
- Too small: Can lead to overheating and premature wear, and may not be able to carry the vehicle's load safely.
- Too large: May rub against the vehicle's bodywork or suspension components, causing damage and affecting handling.
- Incorrect Load or Speed Rating: Tyres have specific load and speed ratings that must be suitable for your vehicle. Using tyres with lower ratings than specified is illegal and dangerous, as they may fail under stress.
Improper Tyre Repairs
While tyre repairs can be a cost-effective solution for minor punctures, they must be carried out correctly and to British Standards. As per BSAU159, repairs are only permitted on the central three-quarters of the tyre's tread area (the 'minor repair area').
Punctures located within 4cm of the tyre's sidewall are generally considered unrepairable. This is because the sidewall flexes significantly during driving, and a repair in this area is unlikely to be safe or durable. Using a tyre that has been repaired outside of these guidelines is illegal.
Penalties for Driving with Illegal Tyres
The consequences of being caught driving with illegal tyres are severe and can impact your wallet, your driving record, and potentially your safety. The penalties are typically enforced by the police and can be applied during roadside checks or if your vehicle is involved in an incident.
Fines
The most common penalty is a substantial fine. For each tyre found to be illegal, you can receive a fixed penalty notice of up to £2,500. This means that if all four of your tyres are illegal, you could face fines totalling up to £10,000.
Penalty Points
In addition to fines, you will also receive penalty points on your driving licence. Typically, three penalty points are issued for each illegal tyre. Accumulating 12 or more penalty points within a three-year period can lead to disqualification from driving.
Insurance Issues
Driving with illegal tyres can also invalidate your car insurance. If you are involved in an accident while using unroadworthy tyres, your insurer may refuse to pay out for any damages or injuries, leaving you personally liable for all costs. This can have devastating financial consequences.
MOT Test Failure
Tyres are a critical component checked during the Ministry of Transport (MOT) test. If your tyres do not meet the legal requirements, your vehicle will fail its MOT. You cannot legally drive your vehicle on the road if it has failed its MOT until the necessary repairs or replacements have been made.
Vehicle Impoundment
In some cases, particularly if the tyres are deemed to be in extremely dangerous condition, the police have the power to impound your vehicle until the tyres are replaced.
What Should You Do If You Suspect Your Tyres Are Illegal?
If you suspect your tyres may be illegal, it is crucial to address the issue promptly. Proactive tyre maintenance is key to avoiding these penalties and ensuring your safety.
Regular Inspections
We recommend that you check your tyres once a month, every month. This should include:
- Tread Depth: Use a tread depth gauge or check the TWIs.
- Tyre Condition: Look for any cuts, cracks, bulges, or signs of perishing on the sidewalls and tread.
- Inflation Pressure: Ensure your tyres are inflated to the correct pressure, as specified by your vehicle manufacturer. Under or over-inflated tyres wear unevenly and can be dangerous.
Seek Professional Advice
If you suspect your tyres are illegal, seek advice from a qualified tyre specialist or a reputable garage. Most garages offer free tyre checks, and organisations like TyreSafe provide resources to help you locate approved fitters.
Replace Immediately
If any of your tyres are found to be illegal, you’ll need to replace them promptly before any further driving. Driving on illegal tyres puts yourself and others at serious risk. It's also important to note that tyres should ideally be replaced in pairs. For example, if one of your front tyres is illegal, you should replace both front tyres to ensure balanced handling and braking.
Consider Tyre Repairs Carefully
If you experience a puncture and consider having your tyre repaired, ensure the repair is carried out by a professional to the relevant British Standard (BSAU159). Remember, repairs are only permissible in the central three-quarters of the tread. If the puncture is too close to the sidewall, a repair is not safe or legal.
Summary Table: Penalties & Consequences
| Infringement | Potential Penalties |
|---|---|
| Illegal Tread Depth (below 1.6mm) | Up to £2,500 fine per tyre, 3 penalty points per tyre |
| Tyre Damage (cuts, bulges, cracks) | Up to £2,500 fine per tyre, 3 penalty points per tyre |
| Incorrect Tyre Size/Type | Up to £2,500 fine per tyre, 3 penalty points per tyre |
| Improper Tyre Repair | Up to £2,500 fine per tyre, 3 penalty points per tyre |
| Accumulation of Penalty Points (12+) | Disqualification from driving |
| Accident with Illegal Tyres | Invalidation of insurance, potential liability for all costs |
| Failing MOT Test | Cannot legally drive vehicle until rectified |
Frequently Asked Questions
Q1: How often should I check my tyres?
It is recommended to check your tyres at least once a month and before any long journeys.
Q2: Can I be fined for just one illegal tyre?
Yes, you can be fined up to £2,500 and receive 3 penalty points for each illegal tyre found on your vehicle.
Q3: Is it legal to repair a tyre near the sidewall?
No, according to British Standard BSAU159, repairs are only permitted in the central three-quarters of the tread area. Repairs near the sidewall are not safe or legal.
Q4: What happens if my tyres fail the MOT test?
If your tyres fail the MOT, your vehicle is not legally roadworthy. You will need to replace or repair the tyres to pass the test before you can drive it legally.
Q5: Where can I find the correct tyre pressure for my car?
The correct tyre pressure information can usually be found in your vehicle's owner's manual or on a sticker located on the driver's side door frame, B-pillar, or fuel filler cap.
In conclusion, maintaining your tyres in a legal and roadworthy condition is not just a matter of avoiding penalties; it's a fundamental aspect of road safety. Regular checks, prompt attention to any signs of wear or damage, and seeking professional advice when needed will ensure you, your passengers, and other road users remain safe. Don't let illegal tyres put you at risk – stay informed and stay safe.
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