Can you help me analyze this wheel data?

[Cheesehead]

Good Morning and thanks in advance for your help

Here is my current setup:
2018 SHO
20 x 8 factory rims
245/45/20 tires
38 offset

Here are the rims I am interested in:
American Muscle FR500 rims (I entered a 2018 Mustang GT for my search as they don't list Taurus)

Front:
20 x 8.5
Offset 1.18, 30 mm
Backspacing 5.93, 151 mm
Tires 255/35/20

Rear:
20 x 10
Offset 1.77, 45 mm
Backspacing 7.30, 185 mm
Tires 305/35/20

I went to Custom Wheel Offset to enter in my current setup and compared it to my proposed setup. Here is what they came up with:

Front:
Inner clearance + 1.65mm or .06"
Outer position extended by 14.35mm or .55"
Diameter difference is 1.65" (-6.12%)

Rear:
Inner clearance is less 1.25"
Outer position extended by 18.4 mm or .71"
Diameter difference is .28" or negative .97%

So based on your experience will these rims fit front and back? I like the staggered look on the SHO but if I went with equal size rims all the way around I would be fine with that.

Thanks again for your help with this!

 

[FiveLeeter918]

I use the S550 setup on my car and have no issues. it actually pushes the wheels out a little more to make them more flush with the fenders. I personally am running 8.5 all around so that I can still rotate.

 

[Cheesehead]

I use the S550 setup on my car and have no issues. it actually pushes the wheels out a little more to make them more flush with the fenders. I personally am running 8.5 all around so that I can still rotate.

I searched for the S550 rims, are those the Zeven's in your signature?

 

[FiveLeeter918]

I searched for the S550 rims, are those the Zeven's in your signature?

Yes sir

 

[Eric Weech]

Has anyone successfully tried a negative offset? If so, did they have to trim a ton?