Wheel and tire experts please chime in. Not sure I really trust the guys at the tire shop as I've read on these forums that they've been wrong quite often.

Looking at a 22x9 front et40 with a 22x11 rear et40 wheel. Can I make this work without customizing the fenders?

The guy at the tire shop is saying that his computer program is showing that the 22x11 rear will rub.

One of the factors playing in here is that the difference in height of the wheel + tire from front to rear cannot be greater than a 3% difference without risking integrity of the AWD system.

I've seen that a really popular rear tire is the 315/25/22. The only 315/25/22 that the shop can order is a Pirelli that is on national back order. Sounded like it might not be available for awhile. Do I have any other options? Thanks for your help!