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- '07 Mazda3, True red
ok, i went to tirerack, to see if the dunlops are available yet, only to find a "dunlop sp 9000 dsst" tire, its a "run-flat" tire, the speed rating goes from "Z" to "V", and it 'requires' a display thingie to show you the tire lost pressure. i dunno about this, should i get 1 of them, or 1 regular sp9000?