05_Bullitt

I don't know yet... Long story as to why I don't know but basically the offset is off by about 20mm in the rear.

Because my vehicle is lowered I will need an adjustable panhard bar.

I talked to a wheel expert who did not order my wheels and he suggested an offset of 45mm.

That sounds correct. American racing goes by backspacing, not offset. Still working on it. I will keep you up to date.

MobyDickDog

05_Bullit and company.

The 2005 Ford Mustang GT has a +45mm Offset wheel from the factory. The allowable Offset is +19 to +65. A nice looking range is +30 to +45 Offset.

THIS ASSUMES you are still going to use an 8" wheel. All you had/have to do is measure the BackSpacing(BS) of the stock wheel. Then decide how much farther out you want your new wheel to stick out from your stock wheel. Subtract that from your stock backspacing. This is your new Backspacing that you will need on your new wheel. You might ask, what about OFFSET? If you have one you can caluculate the other. Remember back in High School that class that you thought was "useless and you will never use this stuff."

OFFSET = (OVERALL width - BS) / 2

Example: (9" - 5.75) / 2 = 1.625 " OFFSET

The OVERALL width on an 8" wheel is not 8". For example it might be 9" or 10" or 9.75".

American Racing Torq Thrust II will require a minimum BS of 5.5" on an 18 X 8 wheel.

I have gotten only 1 qoute in my area so far for AR Torq Thrust II Polished. $325 per wheel. 4 to 12 weeks.