Originally Posted by slammedm3
I only ask because when I first got my 360 wheels, i got the Nitto Invo with a 285/30/20
and if it was another 1/8 of an inch wider, it would rub in the rear like crazy. its amazing that it doesnt seeing as how close it is. So i would only assume the 305 would rub, but every tire manufacturer is a bit different when it comes to widths so i guess you dont know until you try
You must have an extremely aggressive offset. Many, many people run 295's or 305's with no problem on lowered M3's. And yes, tires manufacturers are different. You also have the H&R springs that were originally for the coupe not the vert, right? So your car sits lower in the rear than it would on a coupe...