Goodyear does not mention the word "concrete" in any of its tire storage recommendations.
From what I've read one of the general concerns with a tire being parked in one place on any surface for a long period of time is the oils being drawn out of the rubber.
The concern with concrete in particular is that it can continue to undergo chemical reactions related to "curing" for *years* after it is poured. (
Concrete Scientific Principles)I can't find the link now. But, I have seen it in writing from an "authoritative source" that tires should not be left parked on concrete for this reason.
But, then again, almost everybody is full of bull. Give me money for a study and I can make it say almost anything you want.
I read a thing a while back where one of the world's biggest eggheads claimed that less than 1% of all so-called scientific studies actually follow the scientific method!
I have no idea if that is true. And I don't have a concrete answer for you! (Ha-ha!)
Here's what I do know: **** happens. You're advised to use tire covers to protect your tires from the sun. So why not cover them to protect them from what you're parked on?
Wally world rubber mats are whole lot cheaper than tires. So, I put a rubber mat down when I'm parked just in case there is some kind of chemistry going on that could damage my tires. Either I'm wasting $30 for peace of mind or I'm saving myself a lot of money?