I had purchased a set of four Cooper Discoverer HT3 185/60R15C 94T C Tires on 09/11/20. Since that time, three of the four Tires have failed due to Sidewall Failure. Luckily, the scenarios did not result in "Blowouts" in which control of the vehicle would have been compromised. I returned to the National tire and Battery where the tires were purchased after the first incident and was told that the Sidewall Damage was my fault as I had obviously hit a curb. I informed the young man in charge that this was highly unlikely as it was the inner Sidewall of the Tire and no "Scuff Marks" were present. He declined to assist me in any warranty replacement as I did not purchase their "Road Hazard Insurance". His attitude and lack of assistance has ended my affiliation with NTB!07

- Westminster, MD, USA