All this tire talk has me nervous. I fear I have done them wrong and they are going to leave me.<br/>After shelling a bunch a few years back for new Michelin tires I'm uneasy that I have done them wrong and they won't last.<br/>I have NOT covered them when the RV sits, and it sits way more than driven.<br/>What is the verdict on covers? Good or bad, or just not needed (in the...