Thanks for this thread.
I'm owner of an X5d for almost two weeks now.
I never had a tire as bad as the 18" Bridgestone Dueler RFT on any car I have ever driven in my live.
I owned several new cars equipped with RFT's and never had such an loud, hard and rough running tire before.
The road noise is killing me on the interstate or even highways.
That said, I'm looking for 20" wheels. Is someone selling?