Originally Posted by Boss330
Do you mean that BMW didn't recommend using non run flat tires? (i.e ordinary tires)
Or that BMW didn't recommend refitting run flat tires on a second set of rims?
If it's the first, i believe that this is official BMW policy.
See this article with an interview with a BMW representative:
He said they didn't recommend removing and re-mounting run flat tires after they had been removed. Basically saying how it is very easy to damage the tire. The article was pretty interesting but I'm not sure I'm sold on RFT's especially after seeing complaints about short tire lifespands.