[ABCarr]

The tire sizes you are running are the stock M Sport sizes. The Style 95's you have are wider and have different offsets than the stock Style 172's that are normally on M Sport 550i's. Style 172 are 19x8.5 ET18 (front) and 19x9.5 ET32 (rear). I am a bit surprised that you have outside rubbing on the rear tires with your ET24 rear wheels. On my 2009 550i M Sport, I have the standard 172's and stock tire sizes with 15mm spacers on the rear (giving an effective rear offset of ET17) and no rubbing. That said, some tires are wider than others in the same size, and your springs may be a bit saggy now.

If I had the money, I would install Bilstein PSS10 coilovers on my 550i. You need to be careful with coilovers since many will interfere more with your wheels, which is a bit counterintuitive.