Has anybody checked out Tirerack lately? It seems the replacement prices for the 18" run flats (sport line tires) run about +/- $300 now and are not as high as the E90 RFTs of years past. I remember replacing my first damaged tire on my previous E90 was an exercise in patience (nobody had them at the time) and willingness to pay ($500ish for the single tire). I have no complaints about the Continental RFTs on my current F30 and will likely just replace them with the same when the time comes.
2014 328d MSport