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There are alot of companies that make runflats (4) I think. However, There are only two runflats that can be repaired after an incident (Goodyear, and I think Firestone). One more thing to think about is the fact that the goodyear eagle F1 tires can go 50 miles and then be repaired and run like new or it could run for 200 miles on a completly flat tire all of the other runflats that i''ve seen specs on could only drive for 50 miles tops, then you are on rim.
Good luck and happy hunting
P.S. do a search on this forum if you havent already and there are plenty of threads that will give helpful information and some have links to manufactures websites
Kumho would be something to behold if their product was half as good as their marketing. And, I would only run the Firestones on Ford Explorers - ha ha. Due to the cost of our wheels, I would only trust Goodyear or Michelin for run-flat technology. Other than that make sure you have a cell phone.
I have the Michelin ZPs, have had them a little less than a year. They were a huge improvement over the stock runflats, in terms of performance and cabin noise.
Can't help you with the size question, if you go to Tire Rack's website they have a sizing tool you can use to figure it out though.