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I sell tires.
The best run flat overall is the Michelin Primacy MXM4 ZP. Quietest, smoothest, longest lasting. Good grip/performance.
Next best is the Pirelli Cinturato P7 RFT. Excellent performance overall, but the tread doesn't wear very well. I've seen some come back to my shop completely worn after 30k miles.
The Pirelli Pzero Run Flat is a great performance option, but they'll be done after about 20k miles.
I wouldn't even consider the goodyear or bridgestones as options.
Honestly, you'd be better off ditching the run flats and going with an all season or ultra high performance tire. It will completely transform the car.
Continental Extreme Contact DWS06 Plus is one of the best options. Also, the Michelin Pilot Sport AS 4. The non-run flat P7 is a great tire. Again, I'd avoid Goodyear and Bridgestone, just because the siping on their tires only lasts for about 20k miles, and then the tire is pretty much useless on wet roads.
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