For some time now I have wondered where the "replace tires at 5 years" rule had came from. Tire makers? Turns out its not a Law just a recommendation, so even if the tires spent 3 years of its life in a dark or dim warehouse some place it still counts. Really? This is a Link to the NHTSA’s website and it turns out the 5 year rule is really just a recommendation and here is the complete story. I can upload the PDF but not sure its needed. Tires - NHTSAhttps://www.nhtsa.gov › 9719_S1N_Tires_Nwsltr_June13_062713_v4_tag BTW we have all heard or lived the Chinese trailer tire horror stories, tires new on a trailer, failing on the first trip out and replacements also failing. So why no recall on those if we are really concerned with tire safety??