My front right tire (stock Michelin) suddenly lost all of its air while cruising along on a parkway. By the time I felt the loss (seconds) in my steering and reaching the side of the road the tire was totally destroyed. I changed it and took the tire to the nearest Michelin dealer thinking that it would be replaced under the Michelin guarantee. The dealer examined the tire and reported that there were no obvious reasons for the loss of air, no punctures in the tread, valve appeared okay and concluded that somehow the tire lost air due to some external force that could not be determined because the tire was severely damaged. The sidewalls were shredded as if I drove the car for a considerable distance on the flat tire. He spoke to Michelin customer service and they offered to replace the tire for half the cost (0) of a new tire (0). I think this is a very poor effort on Michelin's part in support of their product. Since there is no evidence of a puncture they are blaming the user for the failure instead of assuming the doubt and replacing the tire, after all the tire could have failed due to "poor workmanship or manufacturing defect" Bottom line Michelin's guarantee is very explicit in stating what it will "not" cover- everything or nothing depending on who reads it. If there is no evidence of a puncture then Michelin assumes the tire is free of defects but somehow was damaged from some external force ergo forget any guarantee. At the end of the day I did not accept the Michelin offer because to do so I would have had to sign a waiver of my rights giving up any recourse I may have to recover my loss. I went to another Michelin dealer and purchased a new tire for about the amount of the replacement tire offer from Michelin. Has anyone experienced the tire guaranty mumbo jumbo and if so have you been able to get some relief from the manufacturer??? BoB