Here is some history to note:
I recently had new GTS's installed. Offsets are +17F, +18R. Originally we tried to fit a 295 on the rear but had serious rubbing issues(even with fender rolling). The car has been dropped an inch and more neg. camber was out of the question. I'm f/i so more neg. camber=less traction. Anyway we put 285's on and they worked with no rubbing. My issue is that the wheels/tires stick out the fender about a 1/4" and I want 295's and preferrably 305's. So to be able to run that wide of tire I need higher offset. Plus I want my tires and rims to be as close to flush as possible w/o rubbing. I have decided to go with a +37 with 107mm lip. Don't question those numbers as they came directly from Ray's fitment chart. That manages to be nearly 3/4" tucked compared to the +18. Here is my dilemma:

1. THis seems to be the offset to run when using wider tires, why don't more people run this combo when desiring more traction?

2. Could it be that I have lost it and have no clue?

3. Will this offset likely rub the inside fender well now?

4. If someone has a better setup in mind please let me know.

This entire offset issue/debate has given me a monstrous case of diarrhea and I'm now going to relieve myself.

Thanks for the help.

Judson

 

How wide are the rims?

 

+37 is pretty high, and may rub the suspension. You would probably be better off with a +28 offset with the 107mm lip, which should give you that clearance that you need.

 

10.5

 

Sorry I left that out. 10.5 wide redlude got it right.

 

i wouldn't go higher than 30+.. stay around 28+ per redludes post

 

My 10.5 Maya GR5's are +29. My 285 doesn't scrub with fenders rolled. I didn't try it without rolling.