18x9.5 +12

The "Project Yankee" speedhunters car did something similar. They ran 17x9's with a -10 offset. But only a 255/40/17, which is only a 25" tall tire. Now, that tire sits 1.4" outside mine. But you can see on that car, even with a heavy negative camber and a pretty short tire, they completely hammered the fender to get clearance. The body line is totally trashed, and the indent around the wheel opening is completely rolled flat and reversed. And I would bet that tire still rubs on that fender in all kinds of normal street driving situations.

Project-Yankee-1975-Dodge-Dart-Sport-Mike-Garrett-32-copy.jpg

They probably should have just added flares to this car to match the JDM style they were after. What's really funny is that they could have easily fit those wheels up front if they'd just used the proper offset.