Tyre Outer Edge Wear MOT Advisory: Causes and Fix

Understanding Tyre Outer Edge Wear

So, you’ve just received your MOT results and noticed an advisory for tyre outer edge wear. It’s not uncommon to feel a bit anxious about what this means for your vehicle. Let’s break it down in plain English, so you can understand the implications and what steps to take next.

Tyre outer edge wear refers to the uneven wearing of the tread on the outer side of your tyres. This can be a sign of various underlying issues, from misalignment to suspension problems. It’s essential to address this wear not just for the sake of your MOT but also for your safety on the road. After all, tyres are your only contact with the road, and any irregularities can affect handling and braking.

What Causes Tyre Outer Edge Wear?

There are several reasons why you might see outer edge wear on your tyres. Understanding these causes can help you pinpoint the issue and decide on the best course of action.

1. Wheel Alignment Issues

One of the most common culprits of outer edge tyre wear is improper wheel alignment. If your wheels are not aligned correctly, it can cause the tyres to wear unevenly. This misalignment can occur due to hitting potholes, curbs, or simply from regular wear and tear over time. When the wheels are out of alignment, the outer edges of the tyres may make more contact with the road, leading to accelerated wear.

2. Suspension Problems

Another significant factor can be related to the suspension system. Worn suspension components, such as bushings or shock absorbers, can affect how your vehicle sits and handles on the road. If the suspension isn’t functioning correctly, it can lead to uneven tyre wear. For instance, if the suspension is too soft or too hard, it might not distribute weight evenly across the tyres, causing one side to wear more than the other.

If you are weighing up alternatives, our guide to Anti-Roll Bar Link Worn MOT Advisory covers similar ground from a different angle.

3. Incorrect Tyre Pressure

Maintaining the correct tyre pressure is crucial for even tyre wear. Over-inflated or under-inflated tyres can lead to various wear patterns, including outer edge wear. If your tyres are consistently over-inflated, the centre of the tread will wear more quickly, while under-inflation can cause the outer edges to wear down faster. Regularly checking your tyre pressure can help prevent these issues.

4. Driving Habits

Believe it or not, your driving style can also contribute to tyre wear. Aggressive driving, such as hard cornering or rapid acceleration, can put extra stress on the outer edges of your tyres. If you tend to take corners sharply or brake hard, you might find that your tyres wear unevenly over time.

5. Tyre Quality and Type

The type of tyres you have can also play a role. Some budget tyres may not be as durable or well-designed as premium brands, leading to quicker wear. Additionally, certain types of tyres are designed for specific conditions; using the wrong type for your driving environment can also lead to uneven wear. Always consider investing in good quality tyres that suit your driving needs.

How Serious Is Tyre Outer Edge Wear?

Now that you know what causes this issue, you might be wondering how serious it is. The seriousness of tyre outer edge wear can vary, but it’s essential to take it seriously.

For more on this topic, take a look at our ABS Warning Light On MOT Advisory guide.

Minor Annoyance vs. Safety Critical

In some cases, outer edge wear might be a minor annoyance, indicating that you need to address alignment or pressure issues. However, if left unchecked, it can become a safety-critical problem. Uneven tyre wear can lead to reduced grip, especially in wet conditions, increasing the risk of skidding or losing control of the vehicle. If you notice significant wear, it’s best to have it checked out sooner rather than later.

Typical Repair Cost Range

When it comes to addressing tyre outer edge wear, the repair costs can vary depending on the underlying cause. Here’s a breakdown of what you might expect:

Wheel Alignment

If the issue is simply a matter of wheel alignment, you can expect to pay between £30 and £100 for a professional alignment service. This is a relatively straightforward fix and should be done regularly to maintain your vehicle’s performance.

Suspension Repairs

If the wear is due to suspension problems, the costs can increase significantly. Depending on the specific components that need replacing, you might be looking at anywhere from £100 to £600. For instance, replacing worn bushings or shock absorbers can be costly, but it’s essential for your vehicle’s safety and handling.

You might also find our Injector Leak MOT Advisory guide useful alongside this one.

Tyre Replacement

In some cases, if the outer edge wear is severe, you may need to replace the tyres altogether. A new tyre can cost anywhere from £50 to £200, depending on the brand and type. It’s worth noting that if you’re replacing one tyre, it’s often recommended to replace them in pairs (front or rear) to maintain balance and handling.

How Urgent Is It? Can You Wait or Fix Now?

The urgency of addressing tyre outer edge wear largely depends on the severity of the wear and the underlying cause. Here’s a guide to help you decide:

Minor Wear

If the wear is minor and you’ve noticed it during your MOT, you might have a bit of time to address it. However, it’s still wise to get it checked out soon. Regularly monitoring your tyre pressure and alignment can help prevent further issues.

Moderate to Severe Wear

If the wear is moderate to severe, it’s best to address it as soon as possible. This is especially true if you notice any changes in handling or if the wear is affecting your ability to drive safely. Ignoring the problem can lead to more significant issues down the line, including potential blowouts or loss of control.

We have covered related ground in our Windscreen Chip in Drivers View MOT Advisory guide, which is worth reading if this subject interests you.

What to Watch For If It Appears Repeatedly

If you find that the tyre outer edge wear keeps reappearing, it’s a sign that something more serious might be at play. Here are a few things to keep an eye on:

Alignment and Suspension Checks

If you’ve had your alignment checked and adjusted, but the wear continues, it might be time to have your suspension system thoroughly inspected. Worn components can lead to persistent alignment issues, which will continue to cause uneven wear.

Tyre Pressure Monitoring

Make it a habit to check your tyre pressure regularly. If you notice that your tyres are consistently losing pressure, it could indicate a leak or other issues. Keeping your tyres properly inflated can help extend their lifespan and improve safety.

Driving Style Assessment

Consider your driving habits. If you’re prone to aggressive driving, it might be worth adjusting your style to reduce stress on your tyres. Smooth acceleration and gentle cornering can help prevent uneven wear.

You can check the exact safety score for any model on the Euro NCAP website.

How This Affects the Car's Value and Your Negotiation Position

If you’re in the market to buy or sell a vehicle, understanding how tyre outer edge wear affects value is crucial. Here’s what you need to know:

Impact on Resale Value

For sellers, a vehicle with a history of tyre outer edge wear can be a red flag for potential buyers. It may indicate underlying issues with the suspension or alignment, which can deter buyers or lead to lower offers. You might want to consider addressing any wear before listing your vehicle to maximise its value.

Negotiation Leverage

For buyers, if you’re considering a vehicle with this advisory, it can provide you with leverage during negotiations. You can use the advisory as a bargaining chip to negotiate a lower price or request that the seller address the issue before finalising the sale. Always remember to check the full MOT history of any vehicle you’re considering; you can do this easily through the GOV.UK MOT history checker.

Conclusion

Tyre outer edge wear can be a concerning advisory on your MOT, but understanding its causes and implications can help you take the right steps. Whether it’s a simple alignment issue or something more serious, addressing the problem promptly is essential for your safety and the longevity of your vehicle. Regular checks and maintenance can prevent these issues from arising in the first place, so make it a habit to keep an eye on your tyres.

If you’ve received an advisory for tyre outer edge wear, don’t panic. Take it as an opportunity to assess your vehicle’s health and ensure you’re driving safely. And remember, before buying a used car, always check its full MOT history to avoid any nasty surprises down the line. You can easily do this through the DVLA vehicle check. Safe driving!