So all the 20" tires on TireRack have an offset between 40 and 45. On the forums there are tons of posts with offsets all over the place. I need help choosing a size wheel but am limited to two wheels that I am looking at.

One is available in these sizes:
20x8.5 30 5x120
20x8.5 48 5x120
20x9 30 5x120
20x11 30 5x120

Another in this size:
20x9 45 5x120

Can someone help me by telling which size of the ones above would fit! Thank you.