I plan on switching to winter tires later this year and want to just leave my Michelin Pilot Sport A/S3 in tire bags in our garage. I can either leave them in a garage in Tahoe where the temps will range from 20* to 60* from November - April, or I can leave them in our Bay Area garage where temps should range from 40* to 80* during that same time period. Does anyone have any expert opinion on which is less harmful for the tires? It is safe to leave them unmounted and off rims for that long?