Hmm I've never had a single bulge in more than 30 years driving various cars and tires!  But I have only used low end brand once which was GT Radial more than 10 years ago and that was also for a relatively short time before I sold the car. Even for Hankook I only have tried the V12E2, not even their mid range or low end models. The most shit tire I have used in the last 10 years was only the Continental CC series that came stock with my wife's car but they didn't bulge, just shit grip.