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Tyre Inspector Tool

If you notice a problem with one of your tyres, we can diagnose it here. Which of the following best describes the problem?

Symptom: Wear on Both Edges

Diagnostic: Under inflation

  • Reduces tread life through increased tread wear on the outside edges (or shoulders) of the tyre
  • Generates excessive heat, which reduces tyre durability and can lead to tyre failure
  • Reduces fuel economy through increased rolling resistance

Solution:

Add air to your tyre until it reaches the proper air pressure (bar: as measured by an air pressure gauge).

To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

Symptom: Wear in the Centre and Excessive Wear

Diagnostic: Over inflation

  • The centre of the tread bears most of the load and wears out faster than the outside edges.
  • To prevent this, always check tyres when they’re cold, before they’ve been driven or at least three hours after.

Solution:

Take air out of your tyre, using a tyre-pressure gauge, until your air pressure reading matches your vehicle manufacturer’s recommended psi. To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

Symptom: Uneven Wear

Diagnostic 1: Poor Alignment

Uneven front or rear tyre wear means that you need an alignment.

Solution:

Many vehicles are equipped with rear suspensions that can be adjusted for alignment. If this is the case, your vehicle may need a "front-end" alignment or a "four-wheel" alignment, depending on the symptoms you are experiencing. See your tyre dealer for an inspection.

More on Alignment in our Scheduled care tips

 

 

Diagnostic 2: Over-inflation issues

  • The centre of the tread bears most of the load and wears out faster than the outside edges.
  • To prevent this, always check tyres when they’re cold, before they’ve been driven or at least three hours after.

Solution:

Take air out of your tyre, using a tyre-pressure gauge, until your air pressure reading matches your vehicle manufacturer’s recommended psi. To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

More on Air pressure

 

Symptom: Scalloped

Diagnostic 1: Poor Alignment

Uneven front or rear tyre wear means that you need an alignment.

Solution:

Many vehicles today are equipped with rear suspensions that can be adjusted for alignment. If this is the case, your vehicle may need a "front-end" alignment or a "four-wheel" alignment, depending on the symptoms you are experiencing. See your tyre dealer for an inspection.

Symptom: Sawtooth Edges and Feathered Edges

Diagnostic: Misalignment

If a vehicle is misaligned, the edges of the tread have a sawtooth or feathered appearance. This is caused by erratic scrubbing against the road.

Solution:

You car most likely needs a toe-in or toe-out alignment correction. Please see your tyre professional for inspection.

Symptoms: Dips and Cups

Diagnostic: Worn Parts

  • Cupping (also called dipping or scalloping) is most common on front tyres.
  • Rear tyres can cup, however, as well.

Solution:

Worn parts may be a sign that wheels are out of balance or that suspension or steering system parts need service or replacement. Please see your tyre professional for inspection.

Symptom: Damage

Diagnostic: Tyre Damage that Requires Repair

Tire Damage Issues:

  • Most punctures from nail holes or cuts up to 6mm" confined to the tread may be repaired by a tyre professional using industry-approved procedures.
  • An on-the-wheel plug-only repair is not reliable and is dangerous because afterwards the inside of the tyre must be checked for punctures.

Solution:

  • The proper repair of a radial tyre (most tyres) includes the placing of a rubber patch on the inner liner of the tyre and a rubber filling in the hole.
  • Do not attempt to repair tyres with tread punctures larger than 6mm" or any sidewall puncture. Also, do not have tyres repaired that are worn below 1.6mm" tread depth.
  • Replace your damaged tyre with a spare tyre – but be sure to first check the spare tyre's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle for an inspection to a tyre professional.

Symptom: Bar Across Tread

Diagnostic: Worn-Out Tyre

  • All tyres have tread-wear indicator bars at 1.6mm" of the remaining tread.
  • When the tread is worn down to 1.6mm" or when you can see the tread-wear indicator bars on any section of the tyre, the tyre is worn out and should be replaced.

Solution:

Take your vehicle to a tyre professional for an inspection and have a professional measure the remaining tread with a tread-depth gauge.

Symptom: flat tyre

Diagnostic: Tyre Damage that Requires Repair

  • Most punctures of nail holes or cuts up to 6mm confined to the tread may be repaired by a tyre professional using industry-approved procedures.
  • An on-the-wheel plug-only repair is not reliable and is dangerous because after a puncture the inside of a tyre must be inspected.

Solution:

  • The proper repair of a radial tyre (most tyres) includes the placing of a rubber patch on the inner liner of the tyre and a rubber filling of the hole.
  • Do not attempt to repair tyres with tread punctures larger than 6mm or any sidewall puncture. Also, do not have tyres repaired that are worn below 1.6mm tread depth.
  • Replace your damaged tyre with a spare tyre – but first be sure to check the spare tyre's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle for an inspection to a tyre professional.

Symptom: soft tyres

Diagnostic: Under inflation

  • Reduces tread life through increased tread wear on the outside edges (or shoulders) of the tyre
  • Generates excessive heat, which reduces tyre durability and can lead to tyre failure
  • Reduces fuel economy through increased rolling resistance

Solution:

Add air to your tire until it reaches the proper air pressure (psi, as measured by an air pressure gauge). To find the proper air pressure, consult your vehicle’s owner’s manual or find your recommended psi on the sticker on your door jamb.
More on Air pressure

Excessive Wear

Overinflation issues:

  • On an overinflated tyre, the center of the tread bears most of the load and wears out faster than the outside edges.
  • To prevent overinflation, always check tyres when they’re cold or before they’ve been driven.
  • Or, check tyres at least three hours after they have been driven.

Solution:

Take air out of your tyre, using a tyre pressure gauge, until your air pressure reading matches your vehicle manufacturer’s recommended psi. To find the proper air pressure, consult your vehicle’s owner’s manual or find your recommended psi on the sticker on your door jam. (Here’s how.)

Damage

Damage That Requires Repair

Tire Damage Issues:

  • Most punctures nail holes, or cuts up to ¼" confined to the tread may be repaired by trained personnel using industry-approved procedures.
  • An on-the-wheel plug-only repair is not reliable and is dangerous because the inside of a tire must be inspected after a puncture.

Solution:

If your vehicle is equipped with one of the several types of temporary spares, replace your damaged tire with the spare, but be sure to first check the spare tire's sidewall for the correct inflation pressure, speed, and mileage limitations. Take your vehicle into an authorized Michelin retailer for an inspection as soon as possible.

The proper repair of a radial tire includes the placing of a rubber patch on the inner liner of the tire and a rubber filling of the hole by a professional. Do not attempt to have repaired tires with tread punctures larger than 1/4" or any sidewall puncture. Also, do not have tires repaired that are worn below 2/32" tread depth.

Wear on Both Edges

Underinflation Issues:

  • Reduces tread life through increased treadwear on the outside edges (or shoulders) of the tire
  • Generates excessive heat, which reduces tire durability and can lead to tyre failure.
  • Reduces fuel economy through increased rolling resistance (soft tyres make your vehicle work harder)

Solution:

Add air to your tyre until it reaches the proper air pressure (psi, as measured by an air pressure gauge). To find the proper air pressure, consult your vehicle’s owner’s manual or find your recommended psi on the sticker on your door jamb. (Here’s how.)

If your tyre continues to lose pressure, visit your local authorized Michelin tyre dealer.

Wear in Center

Overinflation issues:

  • On an overinflated tyre, the center of the tread bears most of the load and wears out faster than the outside edges.
  • To prevent overinflation, always check tyres when they’re cold or before they’ve been driven.
  • Or, check tyres at least three hours after they have been driven.

Solution:

Take air out of your tyre, using a tyre pressure gauge, until your air pressure reading matches your vehicle manufacturer’s recommended psi. To find the proper air pressure, consult your vehicle’s owner’s manual or find your recommended psi on the sticker on your door jam. (Here’s how.)

Uneven Wear

Diagnostic 1: Poor Alignment

Uneven front or rear tyre wear means that you need an alignment.

Solution:

Many vehicles today are equipped with rear suspensions that can be adjusted for alignment. If this is the case, your vehicle may need a "front-end" alignment or a "four-wheel" alignment, depending on the symptoms you are experiencing. See your tyre dealer for an inspection.
More on Alignment in our Scheduled care tips

Diagnostic 2: Over-inflation issues

  • The centre of the tread bears most of the load and wears out faster than the outside edges.
  • To prevent this, always check tyres when they’re cold, before they’ve been driven or at least three hours after.

solution

Take air out of your tyre, using a tyre-pressure gauge, until your air pressure reading matches your vehicle manufacturer’s recommended psi. To find the proper air pressure, consult your vehicle owner’s manual or find your recommended psi on the sticker on your door.

More on Air pressure

Indentation

Normal Radial Sidewall

Indentations are quite natural on radial tires (which most all tires on the road are) and will not affect performance. Your tires feature one or more layers of fabric cord within its sidewall construction that run parallel to each other. (Steel cords are used within the tread.) Where the cords overlap, there is often slight indentation. (For more information on tire construction, click here

Bulging, however, is not normal on a tire. It signifies that there is a gap between the cords, and must be replaced immediately. Do NOT drive on this tire, even down the road to a tire retailer.

Remember this easy math: indentations = good; bulges = bad.

Bulge or Bubble

Damaged Tire That Needs to Be Replaced

A tire with a bulge or bubble cannot be repaired. Damage and Replacement Issues:

  • A bulge or bubble on the sidewall of a tire generally indicates damaged cords caused by a severe impact.
  • Damaged cords often are accompanied by a visible break in the inner liner.
  • If cords have been damaged, air has infiltrated into the plies and can result in a bulge.

Solution:

Immediately replace the tire with the spare and take the tire to an authorized Michelin tire retailer for a proper inspection.

Symptoms: Vibration or shimmy

Diagnostic: Tyres Out of Balance OR Steering & Suspension System Malfunction

Tyres that are out of balance can cause vibrations that lead to driver fatigue, premature or uneven tyre wear and unnecessary wear and tear on your vehicle's suspension.

Solution and advices:

  • The solution could be as simple as rebalancing your tyres
  • You might also need to fix your steering and suspension system.
  • Visit your tyre professional at the very first sign of vibration or "shimmy."
  • If rebalancing doesn't eliminate the vibration, have the alignment and/or suspension system components checked.
  • Tyres should be balanced when they are mounted on wheels for the first time or when they are remounted after being repaired.

Symptoms: Pulling to One side or Poor steering

Diagnostic 1: Poor Alignment

Uneven front or rear tyre wear means that you need an alignment.

Solution:

Many vehicles today are equipped with rear suspensions that can be adjusted for alignment. If this is the case, your vehicle may need a "front-end" alignment or a "four-wheel" alignment, depending on the symptoms you are experiencing. See your tyre dealer for an inspection.

Symptom: Poor handling

Diagnostic: Tyre Damage That Requires Repair

  • Most punctures from nail holes or cuts up to 6mm confined to the tread may be repaired by a tyre professional using industry-approved procedures.
  • An on-the-wheel plug-only repair is not reliable and is dangerous because after a puncture the inside of a tyre must be inspected.

Solution:

  • The proper repair of a radial tyre (most tyres) includes the placing of a rubber patch on the inner liner of the tyre and a rubber filling in the hole.
  • Do not attempt to repair tyres with tread punctures larger than 6mm or any sidewall puncture. Also, do not have tyres repaired that are worn below 1.6mm tread depth.
  • Replace your damaged tyre with a spare tyre – but be sure to first check the spare tyre's sidewall for the correct inflation pressure, speed and mileage limitations. Take your vehicle for an inspection to a tyre professional.