Guys, the bimmer I bought about a week back came with a set of winter tires, now they are sitting on my balcony horizontaly (all four stacked on each other). So they are in the sun (in bags though) and rain, etc... Some say they should be in a dry cool place sitting vertically (side by side)..
What is the proper way to store them without damaging them in any way (heat, etc.)??