I would definitely say the Diamaris are run Flats from experience. Left my house one morning in NY and the Temp was about 4 Degrees. I got on the highway late for a meeting and looked down and saw the Tire Pressure light on. Figured because of the cold, one of the tires pressure dropped and the heat into the tire would bring it back up but I would stop at a certain gas station on my route to double check. Station was about 20 miles away. Ran down the Highway at 65+. Pulled into the gas station to check the pressure and sure enough. NO AIR! Bead was broken as well and the tire drove fine. Had to jack the car to re set the bead and put air in. Went on my way. So I would say yes....Diamrais are Run Flats.

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