I've been running ASA AR1s for a while now: http://www.tirerack.com/wheels/Wheel...All&sort=Brand

The problem I've had is that I've always had some rubbing on the front, mostly when turning right while the car is moving. I have 18x9s all around with 255/40s in the front.

I was glancing at wheel specs and comparing them to other wheels from AmericanMuscle, and noticed the offset and backspacing on the ASA AR1 are a bit larger than any other 18x9 wheel I could find:

• Size: 18x9
• Offset: 45mm
• Backspacing: 6.81"
• Bolt Pattern: 5-114
• Rec. Tire Size: 285/40-18

Does this mean that no matter what size tire I'm running I could always have rubbing with this wheel? I'm wondering if maybe I should buy a couple of the 18x8s for the front instead.

 

This is what I am running in the front, no rubbing with 255/45-18's on the front. Hope this answers you offset and backspace question. These wheels are designed for the 05-09 Stang, looks like your backspacing / offset is wrong for our cars.

American Racing 18"x9" Shelby Redline Wheel for 2005-2009 Mustangs.

Wheel Information
Size: 18" x 9"
Lugs: 5-Lug
Backspacing: 6.50"
Offset: 40mm
Center Cap: Included

 

Yeah it looks like the offset is perfect for the rear of the car, but the S197 does not like the large offset for the front unless you are willing to get rid of your splash guards which is not good on a street car. Anything between a 30 and 40mm should be ok but beyond that is a rear offset.

 

Good thing I read this thread. I was about to pull the trigger and do the same package. 4 18X9's with the same front tire size. How bad does it rub?