I have a 1994 m technic.It is basically a 325is.I will soon be purchasing a set of wheels.The sizes are 18.5 up front and 18x9 in the rear.What tire size should I buy for the 18x9 wheel without no rubbing.Also what size for the front.

from research on the 9 inch rear a 245/35 should be ideal

Why don't you get the same width all around?

Why don't you get the same width all around?

+1

I would run 255's in the rear if you don't end up running the same sizes all the way around.

^255 would be the widest but you will need to roll your fenders to fit that size

I have a 1994 m technic.It is basically a 325is.I will soon be purchasing a set of wheels.The sizes are 18.5 up front and 18x9 in the rear.What tire size should I buy for the 18x9 wheel without no rubbing.Also what size for the front.
How can you tell if your 94 325is is an mtech? I have the same year car, and as far as I know it was the most loaded vehicle available, but don't know if it is a mtech. Could you please enlighten me?

Why don't you get the same width all around?

+1 What is the offset of the rear wheel?

18X9 can go for 235/40/18 AD07 and RE01R for the light weight but good grip as those.