wheels offset on 22's

[TOWRIGG]

decided to change up this year and replace my chrome 22's with gunmetal 22's....the wheel i'm looking at comes in 2 offset's....15mm & 30mm...I believe I should go with the 15mm's because the truck is getting a 2/3 drop...would like to go lower but I tow my trailer and race car around so I don't want any issue's....what do you think?
from these...

to these....

 

[yates ™]

30mm

 

[maddawg]

30mm is what i'm running at it sits flush to just a little sticking out with 305's on a 9.5 wide wheel

 

[yates ™]

so you want it to stick out further?

 

[TOWRIGG]

Actually, I want them to tuck as much as possible without ribbing anywhere

 

[yates ™]

Then you want +30mm.