How long should tyres last before cracking?

Monday 4th August 2025

It’s easy to overlook checking your tyres until you notice a problem, but how long do you have until tyres become unsafe? The lifespan of your tyres depends on several factors, including your driving habits, where you park your car and how often you check your car’s tyres for signs of uneven wear or damage. In this guide, we’ll explain how long tyres typically last, what causes them to crack and when they should be replaced. 

How many miles should tyres last? 

Tyres generally last between 20,000 and 40,000 miles, although premium tyres tend to last longer than budget options, with some lasting up to about 60,000 miles. Front tyres are likely to wear out faster. This is because they carry a greater workload and handle most of the impact of steering, braking and engine power. They also take the brunt of the force when driving over potholes and road surfaces that are in poor condition. Rotating your tyres regularly can extend their lifespan, but if they have directional or asymmetric tread patterns, this may not be possible.  

What causes tyres to crack? 

1. Old tyres 

Ageing rubber is the most common cause of tyre cracking. Over time, rubber reacts with oxygen in the atmosphere, making your tyres more brittle. It takes prolonged exposure to oxidise, with cracks more likely to appear after 5 or more years of use. When purchasing a new set of tyres, check the sidewall for the manufacturer’s date to ensure they haven’t been sitting in storage for years. 

2. UV exposure 

The sun’s UV rays can slowly degrade tyres by breaking down the rubber’s chemical bonds. Regularly parking in strong direct sunlight can put your tyres at risk. Parking in a garage or shaded area can extend your tyres life. 

3. Incorrect tyre pressure 

It’s always important to make sure your tyres are inflated to the correct PSI (pound-force per square inch). Underinflated tyres stretch and flex more while driving, causing more friction, heating up the tyre tread excessively and putting a greater strain on the tyre sidewalls. Overinflated tyres will also wear unevenly as the increased pressure causes the sidewalls to bulge and increases wear in the centre of the tyre tread, resulting in a greater risk of the tyre cracking as the load is not evenly distributed. 

4. Harsh cleaning methods 

Using harsh chemicals to clean your tyres can corrode the rubber, causing them to crack, so steer clear of solvents and petroleum-based cleaners, and stick to simple hot soapy water or a specialist tyre cleaning solution instead.  

Are cracked tyres dangerous? 

Yes, cracks in tyres increase the risk of a blowout, which can lead to accidents. Cracks in tyres, no matter how small, compromise the tyre’s integrity and can reduce your braking and handling performance. 

Is it legal to drive with cracked tyres? 

Not all cracks are illegal, but most are. The law states that all tyres must be in a condition fit for the road. That means if you have cracks that expose the tyre cords or fabric, widespread cracking or cracks on your tyres’ sidewalls, not only are your tyres unsafe, but they are also illegal. Driving with illegal tyres can result in a fine of up to £2,500 and 3 penalty points on your licence for each illegal tyre.   

When should cracked tyres be replaced? 

Most people will need to replace their tyres due to tread wear before cracking becomes an issue. However, if you notice cracking on your tyres, you should replace them as soon as possible.  

Check out our price promise to ensure you get the best deal on tyres. Find your nearest Formula One Autocentres branch to make an appointment and buy your new tyres online from as little as £29. All tyre prices include fitting, valves, standard balancing, disposal and VAT – so there’s nothing else to pay on the day!