Tyres are essential for your vehicle’s safety and performance. While many drivers regularly check tread depth and tyre pressure, sun exposure is often overlooked as a damaging factor. Prolonged exposure to sunlight and heat can cause your tyres to degrade prematurely, increasing the risk of blowouts and poor handling.
In this guide, we’ll show you how to spot sun damage on tyres so you can act early to protect your safety. We’ll also provide expert tips on tyre care to help extend their lifespan. For professional tyre inspections and advice, visit Asda Tyres’ tyre check service.
Why Sun Damage Happens
Tyres are made of rubber compounds vulnerable to ultraviolet (UV) rays and heat. The sun’s energy causes the rubber to dry out and break down through a process called oxidation, leading to cracks and brittleness. This deterioration weakens the tyre’s structure, potentially causing loss of grip and increased risk of tyre failure.
For a detailed explanation of how UV affects tyres, see the Tyre Industry Federation’s guide on tyre ageing.
How to Spot Sun Damage on Tyres
1. Look for Cracks on Sidewalls and Tread
One of the most common signs of sun damage is cracking, often called dry rot. These cracks usually appear on the tyre sidewalls and occasionally on the tread.
- Tip: Perform regular visual inspections and look for small or deep cracks. For guidance on inspecting your tyres, check out our guide to spotting tyre problems before they become a major issue.
2. Check for Discolouration or Fading
Sun exposure can cause your tyres to lose their deep black colour and develop a dull, greyish appearance.
- Tip: Compare tyres on different sides of your car—those parked in the shade may look noticeably darker. The TyreSafe website offers helpful advice on identifying tyre wear and damage.
3. Feel for Brittle or Hard Rubber
Healthy tyres feel flexible. Sun-damaged tyres often harden, losing elasticity and becoming brittle.
- Tip: Gently press and flex the sidewall. If the rubber cracks or feels rigid, it’s time for a professional inspection.
4. Inspect the Tread for Uneven Wear or Damage
Sun damage accelerates tread wear, leading to uneven patterns or chunks missing from the tread, which compromise grip.
- Tip: Use a tread depth gauge or the penny test to check your tyre tread regularly. Learn more about tread safety at the National Highway Traffic Safety Administration (NHTSA).
5. Look for Bulges or Deformations
Severe sun damage may cause the internal tyre structure to weaken, resulting in bulges or bubbles on the sidewall.
- Tip: Bulges are a serious safety hazard requiring immediate tyre replacement. For expert tyre fitting or replacement, visit Asda Tyres.
Why Switch to Summer Tyres?
Summer tyres are specifically engineered to provide superior grip, handling, and braking performance in warm weather conditions. Their softer rubber compounds and optimised tread patterns improve traction on both dry and wet roads, enhancing safety and driving comfort during the hotter months.
By switching to summer tyres, you benefit from better fuel efficiency and reduced stopping distances compared to all-season or winter tyres in warm climates. For drivers who experience high temperatures and lots of sun exposure, summer tyres are a smart choice to maximise vehicle performance.
When to Seek Professional Help
If you observe any of the above signs, it’s important to have your tyres professionally inspected. At Asda Tyres, our trained technicians provide thorough tyre checks and can recommend repairs or replacements to keep you safe.
Book your inspection easily online at our tyre fitting service page.
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