Down Home, there is no set years on how long a tire will last. Michelins Website on tire quality care will help you get extra years out of your tires. I've alway's got at least 10 years out of my Michelin tires, but I will admit I had the tires broke down and inspected. This gives me peace of mind and I don't mind paying the extra cost. On your Michelin Tire Bill my bill was very expensive due to the truck tire shop that Michelin sent me too didn't know how to process the FMCA / Michelin Fleet Tire Program paperwork. Michelin had to cancel the entire tire transaction in my case. Michelin told me that I had to contact them first with my credit card # before going to the tire shop! I did not know this prior to the purchase.