I noticed that my tires are turning blue. I did one track day on them in the fall. I am just noticing that they are blue now. It has been 4 months. My garage is heated. They are michelin power rs manufactured in week 39 of 2016 which is kinda old in my opinion but may have nothing to do with this. Im a little worried seeing the manufacture date now. I did buy these from a reputable online company. I just assumed they would be newer. Anyway... any opinions on this? I would like to hear them. Why are they blue? Should i not use them?
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