I only had my 06 gs300 for six months I have changed those runflats 5 times also... I don't know wat the problem is with these tires.. I don't know why I keep catching flats... And it don't be no regular flat,when the bubble on the tire bust it leaves a big hole in the tire... I live in NYC too and the pot holes are crazy but there's no reason why I keep getting bubbles in my tires and replacing them every month!!! Can anybody suggest a good tire for me to replace it with?