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Tires/vibration

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Question
hi..i have michelin tires, which were bought in dec. of 2007. i have taken very good care of them; very good with the pressure and rotations. so now, a few weeks ago, going home from work, one of the tires lost the outside tread. the tire dealer said this is from the age of the tires. so i had to pay for the one tire, but lately when i drive the car vibrates like an army tank. so my question is, despite the fact that all 4 tires look good, and the pressure is correct, could  the vibration of the car be the tires telling me they need to  be replaced?  thank you!!

Answer
James,

First, it sounds like you only replaced a single tire.  If the problem was the age of the tire, why didn't you replace them all?  Are they all from the same time period?

Second, as a tire fails, it will go through a series of steps - and the first step is vibration - small at first, then gradually getting worse over the course of several hundred miles, before it fails catastrophically.  

So I'm wondering if the old tires are starting to fail.

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Barry Smith

Expertise

I have over 30 years experience in the design, manufacturing, and testing of tires. I have served as the technical advisor to the "800" number. I have authored or co-authored many publications - usually without credit. I can answer almost any technical question, but please don`t ask me to compare brands. I probably have prejudices because of my work experience.

Experience

Member SAE (Society of Automotive Engineers) Member Tire Society (Tire Technical Organization) SCCA Regional Competiton License holder Authored many training manuals on tires, their care and use.

Organizations
SAE (Society of Automotive Engineers) SCCA (Sports Car Club of America) Tire Society

Publications
You may want to visit my web site: http://www.barrystiretech.com/index.html

Education/Credentials
I am a graduate of the University of Dayton, Dayton, OH - BME, 1971 I attended graduate school at the University of Akron - but did not complete my PhD - something I regret.

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