The slightly higher load rating bears no resemblance to the god-awful rock hard side walls of the run flats so don't be concerned you will end up with as stiff side walls as run flats. Not at all. Even with the slightly higher load rating the ride is MUCH more comfortable and the annoying skipping you get when going over pot holes is gone.
Also, you can actually get steering feel back again, just like every other car that does not have run flats fitted.
You can see why BMW dont want to ruin the handling experience of the M3, M5 etc... by fitting non run flats as standard. By doing this, they are already half way to making a great handling car.
