These are not easy to find, I bought at a local metro Boston Direct Tire store - Direct Tire & Auto Service: The top name in Tire & Auto Service in Boston

I decided to try out the narrower profile and I had no problems during a few very heavy snows last season. Very quiet and smooth ride on dry roads. I do a mix of highway and city driving every day in my job.

As stated in the prior post, E53 wheels bore size is 72.5mm but the E70 hub requires a 74.1mm bore. I bought some 19" E53 wheels a few years ago and had the bore enlarged at a performance tire place. But one member here did the job by hand because he wanted X6 wheels on his E70. He said there is just a small lip at the opening of the bore which can be removed.