bmw z4 2.2 + b12 wheel question

[simone1978]

hello guys, maybe you have already been asked but I need information.
on my z4 2.2 I installed b12 shocks. I have the 18 wheel, style 108.
8j x18 et 47 - 225-40-18
8.5x18 et 50 - 255-35-18
the car is so good.

I would like to change wheels, with the individual ones, keeping the same tires.
these wheels, however, have an et 34 in front, and an et 37 rear.

Can this change the quality of the guide or cause damage?

thanks to anyone who can give me this help.
I use the translator!