wheels tires size fitment

Hi! I like this wheels, but i don't know will it fit to my A5 3.2 quattro? There are two different offsets for R19: R19x8.5 ET20 R19x8.5 ET38

i just got a 2010 a5 2.0T. Has anyone put 20 x 8.5/ or staggered? Id would just like to know how it fit. thanks,

Hello folks, I am getting a new 360 Forged Split Seven wheels, and I was wondering what tire size would fit best on my 08 A5 (no lowerings, just regular suspension at this moment). This is the wheel size: 20x9.5. I checked several tire websites, all of them recommend me to use 265/30/20...