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Tyre Troubles: Why Part-Worn Spells Trouble for Your Insurance

Feb 13, 2024

stack of tyres against a black background; the tyres look worn and used

Did you know that part-worn tyres can void your car insurance? Second-hand tyres might seem like a good, budget-friendly idea at the time, but quality tyres are essential. Not only for your car insurance but also for road safety.


At Andrew Dodds Autocare, your local car garage in Ayr, we want to keep you informed so that you can rely on a fully insured and safe vehicle.

What is a part-worn tyre?


A part-worn tyre is a second-hand tyre that has the potential to be reused. They are usually taken from cars that are getting new tyres fitted. Most part-worn tyres are imported from Germany. In Germany, the legal minimum tread depth is 3 mm, while in the UK, it is 1.6 mm. German drivers, therefore, change their tyres earlier than we do, and these tyres are sent over to the UK to be resold.


In our experience, the majority of illegally sold part-worn tyres come from salvage yards. They are typically off of accident-damaged cars, meaning that they are unsafe to drive. 

Understanding the risks of part-worn tyres

About 98% of part-worn tyres circulating in the UK fail to comply with proper regulations⁽¹⁾. And a whopping 34% are dangerous for driving. These alarming statistics mean that most part-worn tyres are technically sold illegally.


Not only can using part-worn, re-treaded, or remoulded tyres lead to life-threatening defects, but it can also result in insurance companies not being liable for any injury, loss, or damage.


If you have part-worn tyres and get into an accident, your insurance company might not accept your claim. It's essential to maintain your vehicle with safe components. Unfortunately, using tyres that don't meet safety standards falls outside these parameters.

Are part-worn tyres safe?

In most cases, part-worn tyres are unsafe. They have a lower tread depth and are often sold by second-hand car dealers or salvage yards who don't perform the necessary legal requirements.


Sometimes, part-worn tyres are sold legally and undergo thorough checks. A part-worn tyre that has undergone proper checks and not been re-treaded must have an 'E' marking. The words 'PART-WORN' must be clearly printed onto the tyre in letters at least 4 mm high.


You should also look out for certain features to ensure the part-worn tyre is safe:


  • The structural integrity of the tyre should be intact, and it shouldn't have cuts longer than 25 mm.
  • The original grooves should be fully visible and at least 2 mm deep across the tread's breadth and around the tyre's circumference.
  • There should be no lumps or bulges internally or externally.
  • The ply or cord shouldn't be exposed internally or externally.
  • Tyres must pass an inflation test before being sold. If there is no external damage when fully inflated, the tyre passes.
Close up of BMW car tyre in snow

The Legal Checkpoints:
using part-worn tyres legally


To ensure that you've bought a legally sold part-worn tyre, it's important to understand specific checkpoints. Part-worn tyres that are sold legally must have an 'E' marking on them. This marking verifies that the tyre complies with all the necessary safety standards.


Additionally, the phrase 'Part Worn' must be visible in legible letters. The markings on the tire indicate that the seller has checked it and declared it safe to use. Selling used tyres that don't meet safety regulations is an offence, as stated in the Consumer Protection Act.

Government findings about part-worn tyres?

Below are some interesting facts from a government investigation into the sale of part-worn tyres purchased from online retailers⁽²⁾.

96%

of part-worn tyres had a tread depth of more than 4 mm.

85%

were not correctly marked and don't comply with regulations.

11%

of part-worn tyres investigated were more than 10 years old.

How much is a part-worn tyre?


We understand you might be looking for a good deal on your tyres. When you come across part-worn tyre prices, which are sometimes extremely cheap, it might seem like a fantastic deal. But is it too good to be true? We think so.


Used tyres are often sold without following the required rules and regulations. Not only does this increase the chances of accidents, but it can void your car insurance cover. While new tyres are more expensive than part-worn tyres, they are safer and can save you money if you were ever to make an insurance claim.

How long do part-worn tyres last?

Part-worn tyres will not last as long as brand new tyres. In fact, they might only last a quarter of the time or even less. Used tyres, therefore, may have hidden expenses and pose significant dangers to life.

Andrew Dodds Autocare, a car garage in Ayr, in the sunshine with five cars parked out front. The building is large and grey with a sloped roof.

Stay covered with Andrew Dodds Autocare

Andrew Dodds Autocare prioritise your safety and peace of mind. We understand that navigating the tyre market can be overwhelming. That's why we offer a comprehensive range of tyres to suit any budget.


Whether you're looking for economy, mid-range, or premium tyres, we have you covered. Our selection includes reputable brands such as Davanti, Triangle, Kumho, Goodyear, and more. Our team is committed to delivering high-quality tyres that meet safety standards at fair prices.


When it comes to your car, you deserve a trusted partner who understands vehicle reliability, safety, and compliance. At Andrew Dodds Autocare, we offer more than just tyres. We provide a complete solution for all your automotive needs.


Our technicians have extensive knowledge about vehicle tyre safety regulations. They can offer sound advice beyond the standard service. Give us a call 01292 299 023, and we will be more than happy to help.

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