2021 Subaru Forester Tires Problems

Tire size: P225/60R/17 98T Was driving around a roundabout @ about 25mph. There was a "Bang" and the right front tire went instantly flat. At no time did the vehicle either hit an object on the road or a curb. Vehicle was pulled over immediately. There is no rim damage that might indicate a curb strike. Upon examination of the tire there is a 2 inch rip in the sidewall of the tire. The tires (4) had been installed on the car @ 20,988 miles. They had been rotated at 27,427 miles. The blowout occurred @ 33,721 miles (12,733 miles from installation. I was told that there is no warranty on the tire(s) since we were not the original owner of the car when they were installed.