Well, I'm not sure if the original poster monitors this thread or if anyone cares, but I was able to successfully change out my stock RFTs yesterday. I thought about this for weeks and it was easier than expected. The sidewalls are so stiff I bent a tire iron, but it's not as crazy as it seems and you do not need a 28k tire machine that is used by the bmw dealer or an off brand $4-5k RFT tire changer.
So for the record, someone has changed RFT at home on this forum.
Attached is a picture of my original RFT (left rear-1st picture). I wore it down to the cord. Anyone know why my left rear would wear much faster than my right rear (2nd picture)?
I think perhaps I weight down the left side and am usually the only passenger 90% of the time.
I'll post a video of the runflat replacement if anyone is interested.
Gary