Will 8½ x18 and 10x18 fit my car ?

Hi,

i want 8½" in the front and 10" in the back.

I can figure out that i will need to expand the rear end of the car, but will the 8½" in the front fit without problems ?

Or will i also have to expanded the front ?

I will use ET 30 for the front.

Are there any problems with using ET 35 in the back ? thinking of the driving skills of the car when having 2 different ET’s for the front and the back.

someone must know ?

my concerns are that if i have to expand the fenders in the front then my frontbumper wont fit properly …