How To Tell If You Have A Flat Tyre And What To Do About It

A flat tyre can represent a real inconvenience on your journey and can potentially cause damage. However, if you are able to identify the problem quickly you can avoid further damage.

A flat tyre can occur while you are driving which you’re likely to notice through your steering wheel. The steering will become unstable after you hear and feel unusual vibrations and a loud noise. As a consequence, you will have trouble keeping up your speed.

But your car could also suffer from a slow puncture which causes, as the name indicates, slow deflation of the tyre allowing it to go undetected for a long period of time. You should be able to notice a slow puncture with a visual inspection. You can start by comparing the tyre with the others, then you can check for nails or other debris that may have run over on the road, and finally examine if there are any unusual wear patterns of the sidewall. However, it is not advisable to solely rely upon visual inspection.

Common Causes Of Flat Tyres

Flat tyres can bring your journey to an abrupt halt. Understanding the reasons behind these unexpected deflations can not only help in diagnosing the issue but also in implementing preventive measures. Here are the primary causes of flat tyres:

Sharp Objects: The most frequent culprits are nails, screws, shards of glass, and other debris that might be scattered on the road. Driving over these can pierce the tyre, leading to a puncture.
Valve Stem Issues: The valve stem is the tiny protrusion where you inflate the tyre with air. If damaged or corroded, it can lead to air leakage and subsequently, a flat tyre.
Tread Wear: Over time, the tread on tyres wears down. Tyres with significantly reduced tread depth are more susceptible to punctures and flats, especially when driving on rough surfaces.
Tyre Bead Leaks: The bead is where the tyre seals against the rim of the wheel. If this seal is imperfect, air can escape, leading to a slow deflation.
Overinflation: Tyres that are filled beyond their recommended air pressure level can burst, especially when exposed to potholes or other road imperfections.
Underinflation: Tyres that aren’t inflated enough are more prone to flats as they can suffer from sidewall cracks. Moreover, underinflated tyres generate more heat, which can lead to premature tyre failure.
Structural Damage: Hitting a deep pothole or slamming into a curb can cause immediate tyre damage. The impact can result in internal structural harm or external visible damage like cuts or bulges.
Vandalism: Unfortunately, intentional acts, such as someone letting the air out of tyres or slashing them, can also be the cause.
Age: Even if not visibly worn out, older tyres can become brittle and more prone to punctures. It’s essential to replace tyres that have exceeded their recommended lifespan, even if they seem fine externally.
Defective Tyres: Sometimes, manufacturing defects or recalls can be the underlying cause. It’s a good practice to keep track of any recalls related to your vehicle’s tyres.

By recognizing these potential causes, drivers can take proactive measures to avoid unexpected tyre failures. Regular tyre checks and maintenance, along with safe driving habits, can reduce the risk of experiencing a flat tyre.

Can You Drive With A Flat Tyre?

Driving with a flat tyre is a question many vehicle owners ponder, especially during unexpected situations on the road. The short answer is no – it is not advisable to drive with a flat tyre. Here’s why:

Safety Concerns: A flat tyre drastically affects the car’s handling. With a deflated tyre, your vehicle can pull to one side, making it harder to steer. Braking distance can also increase, and there’s a risk of the tyre completely disintegrating while in motion, which could lead to severe accidents.
Damage to the Wheel: Driving on a flat tyre, even for a short distance, can cause irreparable damage to the wheel. Once the tyre is flat, the weight of the car rests on the wheel which can cause it to warp or even crack.
Increased Repair Costs: Continuing to drive on a flat tyre may cause more damage than just replacing the tyre itself. It can damage the rim, result in misalignment issues, or even harm the suspension components, leading to much higher repair costs.
Potential for Further Punctures: A flat tyre is more susceptible to further damage from sharp objects on the road. Driving with one flat tyre increases the risk of other tyres becoming punctured or damaged.
Impact on Vehicle Stability: Tyres play a significant role in maintaining the balance and stability of a car. A flat tyre can unsettle this balance, making the car unpredictable, especially at higher speeds or in corners.

However, there’s a notable exception in the form of run-flat tyres. If your vehicle is equipped with these, you can typically drive for an additional 50 miles (though this distance can vary) at a reduced speed after a puncture. But even then, it’s a temporary solution and the tyre will need repair or replacement soon after.

If you suspect or identify a flat tyre while driving, the best course of action is to pull over to a safe location as soon as possible. Check the tyre and, if necessary, replace it with a spare or call for professional assistance. Driving with a flat tyre, even for short distances, is a risk not worth taking.

How Long Does Tyre Foam Last?

Tyre foam, often referred to as “tyre sealant” or “tyre inflator,” is a popular emergency solution for dealing with punctures and minor leaks. It’s essentially a liquid product that, when introduced into a tyre, can temporarily seal small holes, allowing you to continue driving for a short period. But how long can you rely on this solution? Let’s explore.

Immediate Effect: Once applied, tyre foam starts working immediately, sealing small punctures and inflating the tyre to a drivable pressure. This can be incredibly useful if you’re in a location where it’s not safe to change a tyre or if you don’t have a spare.
Duration: The longevity of the foam’s effectiveness varies by product, but on average, tyre foam can last anywhere from 50 to 100 miles of driving. Remember, this is a temporary solution meant to get you to a repair shop or a safe location, not a permanent fix.
Factors Affecting Longevity:
- Size of the Puncture: Tyre foam is effective for small punctures, typically up to 4mm in diameter. Larger holes or gashes might not be sealed effectively, or the seal might not last as long.
- Driving Conditions: Driving at high speeds, over rough terrains, or under heavy loads can reduce the effectiveness and longevity of the foam seal.
- Tyre Condition: Older or more worn tyres might not hold the seal as effectively as newer tyres.
After Use: Once you’ve used tyre foam, it’s essential to visit a tyre specialist or garage as soon as possible. The foam inside the tyre can create an imbalance, affect the tyre’s internal structure, and might not be compatible with certain types of tyre repairs. Furthermore, prolonged driving on a foam-sealed tyre can cause further damage.
Shelf Life: Even if you haven’t used it, tyre foam has a shelf life. Most products are good for 4-8 years in the can, but it’s essential to check the expiration date. Expired foam might not work effectively and could even damage the tyre.

In conclusion, while tyre foam is an excellent emergency tool to have in your vehicle, it’s essential to treat it as a temporary solution. After using it, seek professional assistance to ensure your tyre is safe and properly repaired.

What To Do If You Have A Flat Tyre

If it occurs while driving, as soon as you identify the symptoms previously described, pull over to the side of the road. Depending on your experience you may be able to put on the spare tyre yourself which, if you have one, is located in your vehicle.

However, this is not the case for all vehicles. On the other hand, if you do have a puncture repair kit you may be able to follow its instructions and fix the puncture temporarily until it is properly repaired by an expert. Otherwise, you will need to call out a breakdown service. The MQ Mobile tyres mobile services team can help you get back on the road as soon as possible. Our team will visit you at your most suitable location to fix any tyre-related problem.

How To Use A Tyre Inflation Kit

A tyre inflation kit, often comprised of a sealant and a compressor, is an invaluable tool for drivers. It offers a temporary solution to minor tyre punctures, allowing you to re-inflate your tyre and continue your journey for a limited distance until you can get a professional repair.

Here’s a step-by-step guide on how to use a tyre inflation kit:

Safety First:
- Ensure your vehicle is in a safe location, away from the flow of traffic. If possible, turn on your hazard lights.
- Before using the kit, read the manufacturer’s instructions as some details may vary between brands.
Prepare the Sealant:
- Remove the cap from the sealant bottle or can.
- Attach the hose from the sealant to the tyre’s valve. Ensure it’s securely fastened.
Apply the Sealant:
- Depending on the design, either squeeze the bottle or press the can’s button to release the sealant into the tyre. This process can take a few minutes.
- Once the sealant is fully released into the tyre, remove the hose from the tyre valve.
Using the Compressor:
- Locate the vehicle’s 12V power outlet (often the cigarette lighter port).
- Plug the compressor into the power outlet.
- Attach the air hose from the compressor to the tyre valve.
- Turn on the compressor. The tyre will begin to inflate.
- Monitor the tyre pressure using the gauge on the compressor. It’s essential to inflate the tyre to the recommended pressure indicated in your vehicle’s manual or on the tyre placard located inside the driver’s door or door jamb.
- Once the tyre reaches the desired pressure, turn off the compressor and disconnect it from the valve and power outlet.
Drive Immediately:
- After using the inflation kit, drive your vehicle for at least several miles (or as recommended by the kit’s manufacturer). This helps to distribute the sealant evenly inside the tyre and effectively seal the puncture.
Limitations and Precautions:
- Remember, a tyre inflation kit provides a temporary fix. After using it, visit a professional to inspect and repair or replace the tyre as necessary.
- Most manufacturers recommend not driving faster than 50 mph (80 km/h) and not covering more than 100 miles (160 km) after using a tyre inflation kit.
- If the tyre doesn’t inflate or loses pressure quickly after using the kit, there might be a larger puncture or damage that the kit can’t fix. In this case, avoid driving and seek professional assistance.
- Some tyre repair shops may charge extra for cleaning out the sealant or might not be able to patch a tyre that has been filled with sealant. Check with your local shops regarding their policies.

A tyre inflation kit is a handy tool for emergencies, but it’s crucial to understand its temporary nature. Always follow up with professional services to ensure your vehicle remains safe on the roads.

How To Prevent A Flat Tyre

Putting aside unpredictable issues such as nails in tyres, there are ways you can significantly reduce the risk of a flat tyre. One of them is trying to establish a routine of checking the tread and the air pressure across all your tyres, preferably once a week. The legal minimum tread level required is 1.6mm. However, we recommend the tyre to be replaced if below the tread depth of 3mm to avoid compromising the vehicle’s braking performance and the steering direction.

On the other hand, you may be able to have run-flat tyres fitted. These do not prevent a puncture but it does allow the tyre to remain functional afterwards, for approximately fifty miles. This way, you should be able to reach home or our tyre fitting centre in a safe manner for you and your vehicle. At MQ Mobile tyres we both fit and supply all types of tyres.

Identifying Run-Flat Tyres

Run-flat tyres are a special type of tyre designed to allow you to continue driving even after a puncture, giving you extra time to reach a safe location or a tyre service center. Here’s how you can identify if your vehicle is equipped with run-flat tyres:

Check the sidewall markings: Run-flat tyres typically have specific markings on the sidewall that indicate their capabilities. Look for phrases like “Run-Flat,” “SSR” (Self-Supporting Runflat), “ROF” (Run On Flat), or a symbol that resembles a flat tyre with an arrow. These markings indicate that the tyre is designed to run flat for a certain distance.
Refer to the vehicle owner’s manual: If you’re unsure whether your vehicle has run-flat tyres, consult the owner’s manual. It should provide information about the type of tyres recommended for your vehicle and whether run-flats are included.
Look for a TPMS (Tyre Pressure Monitoring System) icon: Many vehicles equipped with run-flat tyres also have a TPMS that constantly monitors tyre pressure. If your vehicle has a TPMS, you might see a specific icon or warning light on your dashboard that indicates the presence of run-flat tyres.
Check the spare tyre: In some cases, vehicles equipped with run-flat tyres may not have a spare tyre or a standard jack and toolkit. Instead, they might have a tire repair kit, sealant, or a run-flat mobility kit. If you find such equipment in your vehicle, it’s likely an indication that you have run-flat tyres.

Remember that not all vehicles come equipped with run-flat tyres as standard. Some manufacturers offer run-flats as an optional upgrade, so it’s essential to confirm the tyre type when purchasing a new or used vehicle.

If you’re still uncertain whether you have run-flat tyres, consult a tyre professional or contact your vehicle manufacturer for clarification. They will be able to provide accurate information based on your vehicle’s specifications.

By being aware of whether your vehicle has run-flat tyres, you can better understand their capabilities and make informed decisions in case of a tyre puncture or emergency situation.

Can you Drive With A Screw In Your Tyre?

Discovering a screw embedded in your tyre can be a cause for concern. The question many drivers face in this situation is whether it’s safe to continue driving or if immediate action is necessary.

Here’s what you need to know:

Location Matters:
- If the screw is embedded in the tread (the main, thick part of the tyre that comes into contact with the road), there’s a chance that the tyre might still be air-tight.
- However, if the screw is in the sidewall or the shoulder (the areas on the side of the tyre), it’s more problematic. These areas aren’t as thick or robust, and a screw or any puncture here can be more dangerous.
Immediate Risks:
- While the tyre may not immediately deflate with a screw in it, driving can cause the screw to burrow deeper or shift its position, leading to a sudden loss of air or a blowout, especially at higher speeds.
- There’s also the risk of the screw falling out, causing rapid deflation.
Potential for Slow Air Loss:
- Even if the tyre doesn’t deflate immediately, the screw might cause a slow leak, gradually reducing the tyre’s air pressure. This can lead to uneven tyre wear, reduced fuel efficiency, and compromised handling of the vehicle.
Inspection and Action:
- If you notice a screw in your tyre, it’s advisable to pull over safely and inspect the tyre. Check for any noticeable loss of air or any damage around the screw.
- If you’re close to a professional tyre repair shop, you can drive there slowly and carefully. Avoid high speeds and sudden manoeuvres.
- If you’re uncertain about the tyre’s integrity or far from a repair shop, consider using a spare tyre or seeking roadside assistance.
Professional Repair:
- If the screw has not caused significant damage and is located in the tread, the tyre might be repairable. A professional will remove the screw and assess the puncture. If it’s not too large, they can patch it from the inside, ensuring the tyre retains its strength and structural integrity.
- However, if the screw is in the sidewall or if the puncture is too large, tyre replacement might be the only safe option.
Prevention:
- Regularly inspecting your tyres can help you catch foreign objects like screws before they cause more significant issues. If you frequently park or drive in areas with construction or where screws and nails are common, consider investing in tyre sealant or puncture-resistant tyres.

In conclusion, while it might be possible to drive a short distance with a screw in your tyre, it’s not advisable to do so for extended periods or at high speeds. Prioritize safety by addressing the issue promptly and seeking professional assessment and repair.

Identifying a Punctured Tyre

Understanding how to identify a punctured tyre is crucial to ensuring the safety and performance of your vehicle. In case of a puncture, swift identification and action can prevent further damage and potential hazards. Here are some key indicators to help you identify whether your tyre is punctured:

Drop in Air Pressure: The loss of air pressure is a telling sign that a tyre might be punctured. If you observe a sudden deflation or if the tyre pressure monitoring system (TPMS) of your vehicle signals a low-pressure warning, it’s likely that you’re dealing with a punctured tyre. However, identifying a slow puncture can be trickier, as the air loss is gradual and may go unnoticed without routine pressure checks.
Visual Inspection: It’s essential to visually examine your tyres, especially after traversing over rough or debris-filled surfaces. To identify punctured tyres, look for visible signs of damage such as nails, glass shards, or other sharp objects lodged in the tread. Also, inspect the sidewalls for any bulges, cuts, or tears, which could result in air leakage.
Irregular Tyre Wear: Uneven wear on your tyre tread can be indicative of a puncture or other tyre-related issues. To identify any potential punctures, you need to inspect the tread surface meticulously for irregular wear patterns, such as excessive wear on one side or specific areas. These irregularities could be indicative of an underlying issue that needs to be addressed promptly, including a potential puncture.
Altered Vehicle Handling: Changes in your vehicle’s handling and performance can also help identify a punctured tyre. If you notice an increase in vibration, pulling towards one side, or a change in steering responsiveness, a punctured tyre could be the cause. In addition, a decrease in fuel efficiency might be a sign of a flat or underinflated tyre.
Audible Clues: Paying attention to unusual sounds can help you identify a punctured tyre. A puncture can often cause a hissing noise, especially if the damage is substantial and air is escaping quickly.

Taking action after identifying a punctured tyre is paramount. Here’s what you should do:

Find a Safe Spot: Upon suspecting a puncture, identify a safe location to pull over, away from traffic. This will help prevent further tyre damage and ensure your safety.
Inspect the Tyre: Once parked safely, visually inspect the tyre for any signs of damage or embedded objects in the tread. Exercise caution while inspecting, especially if you’re unsure about the process or in a potentially dangerous location.
Measure Tyre Pressure: If possible, use a tyre pressure gauge to measure the air pressure in the tyre you suspect to be punctured. Compare this with the manufacturer-specified pressure. A significant difference can be indicative of a puncture.
Seek Professional Help: If you’re unable to identify the source of the puncture, or lack the tools or experience to deal with a punctured tyre, it’s best to consult a professional. Reach out to a roadside assistance service or a tyre professional for an accurate assessment and appropriate solutions.

Remember, promptly addressing a suspected puncture can prevent further damage and potential safety hazards. Regular tyre maintenance and routine inspections can help identify punctures early, reducing the risk of unexpected punctures.

Frequently Asked Questions (FAQ’s) About Flat Tyres

How do I know if I’ve got a flat tyre?
You may notice symptoms such as increased vibrations, a pulling sensation towards one side, or an audible thumping sound. Your car’s handling might feel unstable, and if equipped with a Tyre Pressure Monitoring System (TPMS), a warning light may illuminate on your dashboard.
How do you tell if a flat tyre has a puncture or just needs air?
You can begin with a visual inspection. Check for any visible punctures like nails or screws embedded in the tyre. If there’s no evident puncture, the tyre might have naturally lost air over time or could be experiencing a slow leak from the valve stem or bead.
What does a car flat tire look like?
A flat tyre will appear deflated with the sidewall touching the ground or the rim. The shape will be distorted, and it might look squished or bulging out at the bottom where it contacts the road.
Can you have a flat tire and not know it?
Yes, especially in the case of a slow leak or if the drop in tyre pressure is minimal. The symptoms might not be immediately noticeable, especially during short drives or at slow speeds.
Can you drive with a slightly flat tyre?
It’s not advisable. Even a slightly deflated tyre can affect the vehicle’s handling, increase fuel consumption, and cause uneven tyre wear. If you suspect your tyre is slightly flat, it’s best to check its pressure and inflate it to the recommended level before driving.
Can you hear a flat tyre?
Often, yes. A completely flat tyre can produce a repeated thumping or flapping sound as the flat part of the tyre hits the road. Additionally, if there’s a large puncture, you might hear a hissing sound as air escapes.
What feels like a flat tyre but isn’t?
Several issues can mimic the sensation of a flat tyre, including alignment problems, worn-out suspension components, brake issues, or even wheel bearing problems. If you’re unsure, it’s best to stop and inspect your tyres and then seek professional advice if needed.
Can a tyre go flat without a puncture?
Yes. Tyres can lose air due to a damaged or corroded valve stem, a deteriorating wheel rim that doesn’t seal properly, or age-related wear and tear. Temperature fluctuations can also cause tyre pressure to drop, albeit temporarily.

Posted on 13th November 2018

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