Originally Posted by deadsp0t
If you were not going to move it, it might be a good idea to have something under the tires. I think the main idea is to keep the concrete from drawing the moister out of the tires.
Hmm never thought about that good point.
On a side note: If you plan on storing it a while with out a cover, you may even want to look for an in expensive heating system and a window unit for the summer just to keep dust down I think Mitsubishi makes some.