hello , i need some help about new rims

[shingkm4]

i am using the oem rims at my f82
want to change the rims to flush
i need to know what is the perfect et
if i use 9j/10j 19. or 9.5j/10.5j 19
my tires is using 255/35 and 275/35 and i dont want to change yet
thanks so much and sorry about my english level
i am from hongkong i love m4

[mehman63]

You could add spacers first to your current setup to give you an idea. The offset of your next set of wheels can be picked to push them closer to your fenders but wheel width, tire size and brand will come into play as well. Do spacers first to get familiar.