2006 530xi wagon wheel and suspension questions
 

First off, My wagon is awd and has the air suspension rear. I am looking to get some 20” wheels on it, I have been getting conflicting answers as to what will or won’t fit. I’m hoping to fill out the wheel well. If anyone has done this before could you spare some advice on what wheel / tire specs to run? Also will I need to lower the car at all? If so, how?