I doubt very many people rotate on account of the weight of these g-rated tires and the hassel of removing the spare and reinstalling. I check the air in my spare before each trip and the spare hopefully stays there till it ages out. It's not like any of us are going to actually wear out our tires and need another one in the rotation to prolong replacing them. 5 or 6 years and my tires get replaced no matter what the tread looks like.
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