I have been using runflats tires since 08 and this is my 3rd set of runflats. This generation is much better than previous RFs, its softer, handles better and quieter, not sure about durability since this set only have 4000 miles on it. The thread material are the same for two identical runflat and non-runflat tires. I am in the opinion that any time you get more 35000 miles off the tires of a performance car, you are doing good.
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