Definitely doesn't look normal. With a May build date, tire age should not be an issue. That wouldn't be normal even if the tires were 4 years old. It does look most like some sort of damage. Maybe cold temperatures making the compound a bit more 'brittle'? But I'm guessing now, I don't even know if it is cold where you are. Strange for sure.
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I have accepted a new position at Tire Rack and am no longer in the sales department. gary@tirerack.com is available to assist with M3 questions.
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