Re: Putting away car for winter... Tire ramps?
Concrete is slightly alkaline at about a pH of 8.5. Mild bases or acids will not harm rubber. Ozone is the real enemy of tires and rubber bushings.
I would get four jack stands and raise the tires off the ground. Walmart sells some for 9 bucks each. With modern wide radial tires, flattening is not really a concern though.
Last edited by David M; 01-02-2019 at 06:15 PM.