I've been told that the life of a trailer tire is about 7 years regardless of mileage. I presume this is true for any low mileage vehicle - if you don't wear the tread off driving then the tire rubber deteriorates in that time period. Correct? But what about farm tractor tires? I purchased a used Ford tractor in 1987 and I am still running the same rear tires - they have very worn treads but it suffices for my needs: mowing and pulling logs primarily. I use it about 150 to 200 hrs a year and with no flats or bursts. All my vehicles are housed under cover.
Bob
Bob