So...been dealing with tires and tire posts for many years and have a plethora of experience with them. However I have a new challenge. Dealers seldom carry my tire in stock and they must be order...
So PLEASE tell us why you did not have the tire analyzed to determine cause??? Simple to do, just have the Sailun Dealer turn into their division that does this and make the determination. Same exact process with GY, if not road hazard GY will replace the tire.
As mentioned YOU have no idea if it were road hazard or the tires fault. I sure would want my tire replaced and would go thru the process at ZERO cost.