I'm wondering if anyone has put 285's on the rear wheels of a coupe, either 9.5 or 10.5 inch wide rims. My car is lowered but not by much, about 1/2 or 3/4 in. I'm also wondering why a lot of people put 275's on 10.5 in rims, looks narrow to me. Any plusses or minuses on the setup would be help. Thanks.

 

Yes they do. I have talked to a few Z and G owners who are running 285/35 on 10.5 wheels which is closer to stock rolling diameter as well as less stretched.
But 275 is as wide as you can go with non-aggressive offsets and possibly not rub.
With 285, you will definitely have to cut/roll your fenders to fit them.

 

I run 285's in the rear and 255's in the front. rear offset is 24 and the rim is 10.5 No rubbing, rolling or cutting of anything. later mike

 

Hmm, what wheels?
I am going to be running Volk CEs in the future 9.5 +22 out front and 10.5 +22 out back, and that setup apparently requires a roll...I guess I'll see what happens when they actually arrive.