We are thinking about buying a new X5 which comes with the run flats as standard equipment. I had a very bad experience on a previous BMW with run flats (4 tires replaced in 18k miles). If I buy an X5 with run flats can I switch to a non run flat tire without changing rims when the OE tire wears out?
You can without worry of fitment. However, 18k on RFT's isn't unheard of, and it really depends on the type of driving you're doing as to the life of the tires (like any tires, really). I've seen multiple reports of RFTs lasting into the 30k+ range. Think about it this way...if you were ever in a situation where you got a flat, what would you rather do: have to change the tire (potentially in some sort of disastrous climate), or just drive to get it repaired/replaced? If I were you, I'd reconsider the shift, but that's just me.
