DUNLOPSP Sport 5000 DSST All-Season Radial Tire - 245/40R19 94V

These were original equipment on my INFINITI red sport. By 20000 miles i have replaced two of the tires because of sidewall failure. The first developed bulges which obviously wouldn’t pass inspection, the second went flat because the sidewall delaminated. There was no obvious damage to the tires or wheels. Plenty of tread remained. The car is on lease which can’t end soon enough because I don’t trust the tires. Since this is my first set of runflats, I don’t know if this is a runflat problem or a Dunlop problem. I have owned or leased 32 cars and trucks over the years and have never had a tire fail in this way. Customer service was not helpful.