Well its a no no in Aus, what compounds the problem with RFTs is the low profile. Yes I'm running M series wheels which came with RFTs and I seriously can't wait until they wear down enough to justify replacing them. I can understand why other manufacturers dont fit them to their vehicles, its all very well to say in the event of a puncture you can still drive your car but what happens if you hit some thing that destroys your tyre, and you have no spare 'der' to BMW.