The AEV wheel's 17x8.5" back spacing is advertised at 5.8" and the stock wheel is 6.3" (calculated from 45.72mm offset). We must be careful when talking back spacing vs offset. as the wheel width changes everything, so you cannot really compare them side by side. The stock wheel sits 0.5" farther inward than the AEV. The AEV is 0.5" wider so the outside edge of the wheel should be a total 1" farther outward. The 0.5" of back spacing you are not getting from the AEV wheel is what is causing your tire to rub on the radius arm (if it does) with the stock wheel.
If one decided that a 1/4" spacer was an option, the question would be, is this enough to fix the rubbing issue under full lock? Every tire is different and couple that with fabrication tolerances, and you have a trial and error situation. If it is, and you are comfortable with it, then you saved yourself about $1k in wheels. If it does not, then you are out $40, and have to buy wheels anyway.