Choose a language
tire tread unusual



The Tire Doctor will see you now. If you notice a problem with one of your tires, we can diagnose it here. Which of the following best describes the problem?


car edito infographic indention tips and advice

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.
car edito infographic budgebubble tips and advice


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

map search desktop
Search by
Address, City or Postal Code
Locate me
You are using an unsupported web browser
You are using a website browser that is not supported by this website. This means that some functionnality may not work as intented. This may result in strange behaviors when browsing round. Use or updgrade/install one of the following browsers to take full advantage of this website