Tire life expectancy
We have a 2007 Winnebago Journey with original Michelin RV extended life rubber tires. Our RV is stored in an enclosed barn and we keep the outside of the tires coated with armorall UV protectant tire...
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I too store indoors. My first set of Michelins were changed out at 10 years. The tire tech said they were in great shape and could easily have lasted another year. The second set of Michelins were replaced at 11 years of age. When dismounted, there were no signs of cracking on the inside of the tire. Whether the tire is new or not, I inspect them closely before any trip. I also maintain 90% of max tire pressure which reduces sidewall flex and improves tire life IMHO.
