I was considering putting staggered monoblock IIs on my car with a decent summer tire. The trick is, I don't want to mess with the suspension if I can avoid it and I'd like to maintain a good ride quality.

My Idea is:

18x8 AMG Monoblock II ET31 with 235/40/18 Sumitomo HTR Z II
18x9 AMG Monoblock II ET35 with 265/35/18 Sumitomo HTR Z II


I own a black 98 C280 elegance model.


How much of a sacrifice will I be making in ride quality if I went 225 up front and or 255 in back?

Thanks!