Tread Unusual

Diagnostic: underinflation

A tire is called underinflated when it doesn’t have sufficient air pressure to meet the vehicle manufacturer’s recommended psi (pressure per square inch). Underinflated tires lead to flats and tire blowouts.

Underinflation:

reduces tread life through increased tread wear on the outside edges (or shoulders) of the tire
generates excessive heat, which reduces tire durability and can lead to tire failure
reduces fuel economy through increased rolling resistance (underinflated tires make your vehicle work harder)

Diagnostic: overinflation

On an overinflated tire, the centre of the tread bears most of the load and wears out faster than the outside edges.
To prevent overinflation, always check tires when they’re cold, before they’ve been driven on or at least three hours after.

Solution:

Adjust inflation pressure using a tire pressure gauge when tires are cold and before they are driven on. To find the proper air pressure, consult your vehicle’s owner’s manual or find your recommended psi on the sticker on your door.

Diagnostic 1: poor alignment

Uneven front or rear tire wear means you need an alignment.
Changes in your vehicle's handling or steering response (e.g., pulling to one side).

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 local Michelin authorized tire dealer for service and inspection.

Diagnostic 2: overinflation issues

On an overinflated tire, the centre of the tread bears most of the load and wears out faster than the outside edges.
To prevent overinflation, always check tires when they’re cold, before they’ve been driven on or at least three hours after.

Solution:

Diagnostic 1: poor alignment

You need an alignment when you notice:

Uneven front or rear tire wear means you may need an alignment.
Changes in your vehicle's handling or steering response (e.g., pulling to one side).

Solution:

Diagnostic 2: overinflation

On an overinflated tire, the centre of the tread bears most of the load and wears out faster than the outside edges.
To prevent overinflation, always check tires when they’re cold, before they’ve been driven on or at least three hours after.

Solution:

Diagnostic: worn parts

Cupping can be attributed to bent or worn suspension parts, wheel misalignment, an imbalance of the tire/wheel assembly, etc. Once this type of wear pattern has occurred, it is irreversible and the tires will continue to wear unevenly.
However, rear tires can cup 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 local authorized Michelin retailer for inspection.

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Tread Unusual

Symptom: wear on both edges

Diagnostic: underinflation

Underinflation:

Solution:

Symptom: wear in centre and excessive wear

Diagnostic: overinflation

Solution:

Symptom: uneven wear

Diagnostic 1: poor alignment

Solution:

Diagnostic 2: overinflation issues

Solution:

Symptom: scalloped

Diagnostic 1: poor alignment

Solution:

Diagnostic 2: overinflation

Solution:

Symptom: sawtooth edges and feathered edges

Diagnostic: misalignment

Solution:

Symptoms: dips and cups

Diagnostic: worn parts

Solution:

Symptom: damage

Diagnostic: tire damage that requires repair

Solution:

Symptom: bar across tread

Diagnostic: worn-out tire

Solution: