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Sidewall Problems

Use Michelin's Sidewall Inspector to identify what you are looking at before deciding whether to drive the vehicle. An indentation where cords overlap inside the tire is a normal manufacturing feature and completely harmless. A protrusion or bubble indicates an internal structural failure and means the tire must be replaced immediately. The tool provides a clear, specific recommendation based on your description, including when to pull over without driving further.

FAQ

Read our Frequently Asked Questions.

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  • Rubber (both natural and synthetic) for flexibility and grip 

  • Steel in the belts and bead wires for structural strength 

  • Textile fibers (nylon, polyester, aramid) for the carcass plies 

  • Carbon black and silica to reinforce the rubber and improve durability and rolling resistance 

  • Chemicals and resins to bind everything together and tune performance properties 

The tread compound recipe is what varies most between tire types—winter tires use a softer compound that stays pliable in the cold, while performance summer tires use a stickier compound optimized for warm pavement. 

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