The Real Cost of Driving on Bald Tyres
23rd January 2026
Bald tyres are one of those problems that can quietly creep up on drivers. You might not notice a gradual loss of tread from day to day, but once tyres dip below the safe levels, the risks and costs rise quickly. While some people delay replacement to save money in the short term, the reality is that driving on bald tyres often ends up costing far more than a new set ever would.
It’s important to look past the prices of tyres and consider the safety, legality, fuel efficiency and the long-term impact on your vehicle as it will cost more if not rectified quickly.
What counts as a bald tyre in the UK?
In the UK, the legal minimum tread depth for car tyres is 1.6mm across the central three-quarters of the tyre, around the entire circumference. Tyres worn below this limit are classed as illegal. Even before reaching that point, performance starts to drop off, particularly in wet conditions where tread depth is essential for dispersing water and maintaining grip.
Many drivers assume that as long as the tyre has not completely worn smooth, it is still safe. In reality, tyres with low tread are far more likely to lose traction, especially during braking or cornering.
The legal and financial penalties
One of the most immediate costs of driving on bald tyres is the legal risk. If you are stopped by the police, the penalties can be very severe. Each illegal tyre can result in a fine of up to £2,500 and three penalty points per tyre. If all four tyres are below the legal limit, this could mean a fine of up to £10,000 and twelve points, enough to lose your licence altogether.
Illegal tyres will also result in an automatic MOT test failure. You will need to pay for tyre replacement before the vehicle can be retested, and in some cases, you may also need to cover the cost of a partial or full re-test. What started as an attempt to delay spending on tyres can quickly turn into an unavoidable and more expensive problem.
Safety risks that cannot be ignored
Worn tyres significantly increase stopping distances, especially on wet roads. Without adequate tread, tyres struggle to channel water away, increasing the risk of aquaplaning and loss of control.
In emergency situations, even a small reduction in grip can make the difference between stopping safely and being involved in a collision. Accidents linked to tyre condition can lead to costly repairs, insurance claims and, in the worst cases, serious injury. These are costs that go far beyond money.
Higher insurance and liability costs
Driving on bald tyres can also affect your insurance. If you are involved in an accident and your tyres are found to be below the legal tread limit, insurers may refuse to pay out. This could leave you personally responsible for repair costs to your own vehicle and any third-party damage.
In more serious cases, liability claims can escalate quickly. What may have seemed like a minor saving by postponing tyre replacement can expose you to thousands of pounds in unexpected expenses.
Increased fuel consumption and wear on your car
Tyres in poor condition do not perform efficiently. Bald or unevenly worn tyres can increase rolling resistance, forcing your engine to work harder. Over time, this leads to higher fuel consumption, meaning you pay more at the pump without realising why.
Low-quality traction can also place additional strain on other components, such as suspension and braking systems. These parts are designed to work with tyres that provide proper grip and cushioning. When tyres are worn, the extra stress can contribute to premature wear and additional repair bills.
The false economy of delaying tyre replacement
Many drivers delay changing tyres because the upfront cost feels significant. However, when you compare that cost with fines, increased fuel usage, potential insurance issues and the risk of accidents, the logic quickly falls apart.
Replacing tyres at the right time helps you maintain predictable handling, shorter braking distances and better overall vehicle performance. It also gives you peace of mind, knowing your car is safe, legal and efficient.
When should you replace your tyres?
You should replace your tyres when the central tread reaches 1.6mm. You can check this by using a 20p coin inserted into the central tread, if you can see the outer edge of the coin the tread is too worn and the tyre needs to be replaced. If the tyres show cuts and bulges, and are older than 6 years, it’s time to talk to a professional. Regular tyre checks, including visual inspections and pressure monitoring, can help you spot issues early and avoid last-minute replacements. Professional tyre checks are particularly useful before long journeys or seasonal changes, when road conditions are more demanding.
How Merityre can help keep you safe and legal
Merityre provides professional tyre inspections, advice and replacements to help you avoid the hidden costs of bald tyres. With a wide range of tyres to suit different vehicles, budgets and driving styles, Merityre makes it easier to stay safe without overspending.
By booking a service with us, you can avoid fines, reduce accident risk and keep your vehicle running efficiently.