Yeah, run-flat-tire suck. One of their many problems is "bubbles" in the sidewalls. If there's a bubble, the tire is not safe to drive on. The new U11 X1 comes exclusively with non-run-flat tires, as does the new G60 5 Series. My next BMW, a G20 3 Series, will come with run-flats, but they will be replaced with non-run-flats as part of new car ... More @Wikipedia
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