What Causes Flat Spots on Tyres and Can They Be Fixed?

If your car begins vibrating after sitting unused for several days or weeks, the tyres may be part of the problem. In some cases, prolonged parking can cause tyre flat spots, where one section of a tyre temporarily or permanently becomes flatter than the rest of the tread. The result can feel like a repeating thump, vibration, or roughness that changes with road speed.

Some flat spots disappear after the tyres warm up during normal driving, while others indicate more permanent tyre damage. Understanding the difference can help you decide whether the tyres simply need time to recover or should be professionally inspected.

What Is a Flat Spot on a Tyre?

A flat spot develops when one section of the tyre becomes less rounded than the rest.

Normally, a tyre continuously changes shape slightly as it rotates and carries the weight of the vehicle. When a car remains parked in the same position for an extended period, the section touching the ground supports the vehicle continuously.

This can temporarily alter the shape of the tyre.

When the car starts moving again, that affected section may produce a noticeable vibration until the tyre returns to its normal shape.

More severe flat spotting can become permanent, particularly if other factors such as incorrect pressure, long-term storage, heavy vehicle weight, or tyre damage are involved.

What Do Tyre Flat Spots Feel Like?

The most common symptom is vibration.

You may notice:

• A rhythmic thumping sensation
• Steering-wheel vibration
• Vibration through the seat or floor
• A rough ride immediately after setting off
• Noise that increases with speed

The sensation often feels as though the tyre is no longer perfectly round.

Temporary flat spotting may be most noticeable during the first few miles of a journey and then gradually improve as the tyres warm up.

If the vibration remains unchanged after driving, another tyre or wheel issue may be responsible.

What Causes Tyre Flat Spots?

Several conditions can contribute to flat spotting.

Leaving a Vehicle Parked for Long Periods

Extended parking is one of the most common causes.

Cars that are used only occasionally may remain in exactly the same position for weeks or months.

The tyre section contacting the ground remains under continuous load, which can cause temporary deformation.

This is particularly relevant for:

• Second cars
• Classic vehicles
• Vehicles stored over winter
• Cars left while owners are travelling
• Low-mileage vehicles

The longer the vehicle remains stationary, the greater the possibility of noticeable deformation.

Low Tyre Pressure

Underinflated tyres flex more than correctly inflated ones.

When a vehicle sits for an extended period with low pressure, the tyre’s sidewall and contact patch may deform more significantly under the vehicle’s weight.

Correct inflation is therefore especially important before storing a car.

Pressure should always be set according to the vehicle manufacturer’s recommendations.

Cold Temperatures

Temperature can affect tyre flexibility.

Rubber may become less flexible in colder conditions, making temporary flat spotting more noticeable after the vehicle has been parked overnight or for several days.

As the tyre warms through normal driving, it may gradually recover its normal shape.

Heavy Vehicles

Vehicle weight affects how much pressure is placed on each tyre.

Heavier vehicles, SUVs, vans, electric vehicles, or cars carrying additional loads may place greater stress on the tyre contact patch during long periods of parking.

This does not mean heavier vehicles automatically develop flat spots, but correct tyre specification and pressure become particularly important.

Hard Braking

Flat spotting can also occur in a very different way.

During severe braking where a wheel locks and slides rather than rotates, one area of the tyre can be dragged across the road surface.

This can remove rubber from one part of the tread.

Modern ABS systems are designed to reduce wheel lock, but tyre damage from sliding can still occur in certain situations.

Unlike temporary parking flat spots, tread damage caused by sliding is usually permanent.

Are Tyre Flat Spots Dangerous?

It depends on the type and severity.

A temporary flat spot that disappears after normal driving may not indicate permanent structural damage.

However, persistent vibration should always be investigated.

Permanent deformation or tread damage can affect:

• Ride quality
• Tyre balance
• Road contact
• Handling
• Tyre wear

A tyre that has also developed cracking, a bulge, sidewall damage, or exposed structural material may require replacement regardless of the flat spot itself.

If you are unsure, a professional tyre inspection is safer than continuing to drive and hoping the vibration disappears.

Can Flat Spots Disappear on Their Own?

Temporary flat spots often can.

After the vehicle begins moving, heat builds within the tyre and the rubber becomes more flexible.

This may allow the tyre to recover its normal shape.

You may notice the vibration gradually reducing after several miles.

However, recovery depends on factors such as:

• How long the vehicle was parked
• Tyre age
• Temperature
• Tyre construction
• Vehicle weight
• Tyre pressure

If the vibration persists after a reasonable drive, the tyres should be checked.

Do not assume every persistent vibration is caused by flat spotting.

Can Permanent Flat Spots Be Repaired?

Usually not in the same way that a simple tread puncture can be repaired.

If part of the tyre has been physically worn away or permanently deformed, there is no practical way to restore the missing material or original tyre structure.

Replacement may be necessary.

A technician should first confirm whether the tyre is actually the cause because similar vibration can also result from:

• Wheel imbalance
• Bent wheels
• Suspension problems
• Wheel-bearing faults
• Tyre internal damage
• Alignment issues

Correct diagnosis helps avoid replacing a tyre when the problem is elsewhere.

How Can You Tell Flat Spots From Wheel Imbalance?

The symptoms can feel similar.

Both can create vibration that becomes more noticeable at certain speeds.

However, there are some useful clues.

Temporary flat spotting often:

• Appears after prolonged parking
• Is strongest immediately after setting off
• Improves as the tyres warm

Wheel imbalance often:

• Remains consistent
• Appears within a particular speed range
• Does not disappear after the tyres warm
• May be felt strongly through the steering wheel or seat

These are general patterns rather than guaranteed diagnoses.

Professional wheel and tyre inspection provides a more reliable answer.

Could Uneven Tyre Wear Feel Like a Flat Spot?

Yes.

Tyres can develop irregular wear patterns that make the vehicle feel as though one section of the tyre is uneven.

Cupping or scalloped tread wear can create a repeated vibration or droning noise as the wheel rotates.

Possible causes include:

• Wheel imbalance
• Worn suspension
• Incorrect alignment
• Tyre pressure problems
• Damaged components

G4 Tyres & Wheels includes uneven-wear analysis as part of its tyre inspection because unusual wear patterns can indicate problems beyond the tyre itself.

If flat-spot symptoms continue, checking the complete tread surface is important.

Can Wheel Balancing Fix a Flat Spot?

Balancing can correct uneven weight distribution around the wheel and tyre assembly.

It cannot restore a tyre that is permanently misshapen or has part of its tread worn away.

However, because flat spotting and imbalance can create similar symptoms, balancing may be part of the diagnostic process.

A technician may inspect the tyre first and then determine whether:

• The tyre is deformed
• The wheel is damaged
• Balancing is required
• Another mechanical fault exists

This is more effective than automatically adding balance weights without identifying the underlying issue.

How Can You Prevent Flat Spots During Long-Term Parking?

If you know your vehicle will remain unused for an extended period, a few simple steps may reduce the risk.

Check Tyre Pressure

Inflate the tyres to the pressure specified by the vehicle manufacturer.

Do not simply increase pressure beyond the recommended level unless the vehicle manufacturer provides specific storage instructions.

Avoid Leaving the Car Heavily Loaded

Remove unnecessary heavy items before long-term storage.

Reducing avoidable load means the tyres do not have to support additional weight while stationary.

Move the Vehicle Periodically

Where safe and practical, moving the vehicle changes which part of each tyre supports the weight.

Even repositioning the car can help prevent the same section remaining compressed continuously.

Store the Vehicle Appropriately

Extreme temperatures, direct sunlight, moisture, and long periods of inactivity can all affect tyres.

A suitable storage environment can help protect rubber components during extended periods off the road.

Inspect Before Returning to Regular Use

If a vehicle has been stored for months, check the tyres before immediately beginning a long journey.

Look for:

• Pressure loss
• Cracking
• Bulges
• Uneven shape
• Tread damage
• Embedded objects

Older tyres deserve particular attention even when their tread depth still appears good.

Does Tyre Age Make Flat Spotting Worse?

It can.

Tyre rubber gradually changes as it ages and may become harder and less flexible.

An older tyre may therefore recover less easily from deformation than a newer tyre in good condition.

Age should be assessed alongside:

• Tread depth
• Sidewall condition
• Pressure
• Cracking
• Vehicle usage

Tyres with significant age-related deterioration should be professionally checked regardless of whether they have flat spots.

Should You Replace Tyres After Long-Term Storage?

Not automatically.

A vehicle being parked for months does not itself mean every tyre needs replacement.

The decision should be based on the actual tyre condition.

A professional check can assess:

• Tread depth
• Pressure
• Sidewalls
• Age
• Uneven wear
• Cracking
• Bulges
• Air leaks

G4 Tyres & Wheels offers tyre inspections at its Guildford workshop covering these areas, which can be useful after a vehicle has spent a long period off the road.

What If the Vibration Starts After Hitting a Pothole?

If vibration begins immediately after a pothole impact, flat spotting from parking is unlikely to be the main explanation.

A pothole can potentially affect:

• Tyre structure
• Wheel shape
• Wheel balance
• Alignment
• Suspension components

Look for sidewall bulges, cuts, pressure loss, or visible wheel damage.

Even when nothing obvious is visible, a significant new vibration after an impact deserves inspection.

Internal tyre or wheel damage may not always be easy to see from outside.

Tyre Checks for Drivers in Guildford

Vehicles around Guildford, Jacobs Well, Woking, Worplesdon, Merrow, and nearby parts of Surrey may experience everything from daily commuting to long periods parked between journeys.

If your car has been unused and suddenly develops a vibration when you start driving again, checking the tyres is a sensible first step.

G4 Tyres & Wheels provides tyre inspections, new tyre fitting, wheel balancing, wheel alignment, puncture repair, and other wheel and tyre services from its Jacobs Well workshop.

A professional inspection can help distinguish temporary tyre deformation from permanent tyre damage or another wheel-related problem.

Frequently Asked Questions

How long do tyre flat spots take to disappear?

Temporary flat spots may improve after the tyres warm during normal driving. The exact time varies depending on tyre construction, temperature, vehicle weight, and how long the vehicle was parked.

Can tyres get flat spots overnight?

Temporary deformation can sometimes become noticeable after overnight parking, particularly in cold weather, although more significant flat spotting is more commonly associated with longer periods of inactivity.

Are flat spots permanent?

Some are temporary, while others are permanent. Flat spots caused by tread being physically worn away or severe long-term deformation are less likely to recover.

Can low tyre pressure cause flat spots?

Low pressure can increase tyre deformation while the vehicle is stationary and may contribute to flat spotting.

Why is my car vibrating after being parked for weeks?

Temporary tyre deformation is one possibility. Wheel imbalance, tyre damage, pressure loss, or other mechanical problems can also cause vibration.

Do Not Ignore Persistent Vibration

Temporary tyre flat spots are often more irritating than serious, particularly when the vibration disappears after the tyres warm up.

Persistent vibration is different.

If the vehicle continues to thump, shake, or feel rough after normal driving, the tyre, wheel, balancing, and related components should be inspected.

The key is determining whether the tyre has temporarily changed shape or whether permanent wear or damage has occurred.

Checking tyre condition before replacing parts gives you a clearer answer and helps ensure that the real cause of the vibration is addressed.