I never worry too much about tires. I keep good tread on my cars all the time. I drive on the average of 2500 miles a week in the rig. I have on the average of 5 flats a yr on her. Not bad when you are managing 18 of them. I am lucky to get 1 flat in 5 yrs on the cars I own. It can happen I know, but we kind of learn to watch for hazards out there. Now that I have jinxed myself...off I go....lol