Your problem with the tires bubbling and cracking the new 128's really concerned me as I bought the lower profile sizes also. I did some research and got some good reassuring information on the Falken FK452's. The thread is titled "Load Range concerns with lower profile 21" tires". Your problem was my inspiration to research. I was just sharing with the group and wanted you to be aware also. You might want to check it out. Thanks.
Really like your car. I have a 745i with same color. Currently have your same stock chrome 95 wheels mounted but they have pitted and one is peeling after 1 1/2 years. I just bought chrome 128's from wheels and caps and was wondering what size tires you are running. I have some Falken 255/30/21 and 295/25/21's sitting and waiting to be mounted. I know it is not the ideal size, but the preferred size was not available unless I paid premium for the Pirelli's. Do you think I will need spacers? My car has the sport package but is not a sport model. Is this already lowered or will I need to lower? Can this be done via computer instead on putting on new springs? Thanks for your help.