My plans! Need some help w/offset

[mcm1209]

Ok
Decided to go with a 2.5" topgun customz leveling kit. I like that you don't have to cut the studs at the top of the strut.
http://www.topguncustomz.com/Store/Gen2ProdDisplay.php?iview=249392010

Wheels will be 20x9 KMC Monsters
Tires Nitto Trail Grappler's
295 55 20 OR 305 55 20

I really want the 305's and I don't mind trimming but I don't want to trim on metal.

My question!
What offset/BS would work best for that set up?
They have

-44
-12
+18
+25
+35



Thanks for the help

EDIT:
Since this the wife's Tahoe (I have a 2007 Trailblazer SS), she likes the KMC Monsters better so. That's what we are going with now.

 

[mcm1209]

I had 18x9 monster on my 09 crew cab with +18 offset with 305 60 18 discoverer STT's running a CCM 2.5" kit. I had no rubbing what so ever. Didn't have to do any trimming or cutting. Just wondering if the Tahoe would have the same suspension geometry as my crew cab?

 

[WS92]

I'm in the same situation and would like to hear from someone who has already done this, I've asked around and gotten zero replies.

 

[mcm1209]

Well I went ahead and bought 20x9 w/+18 offset KMC Monsters
I'll see how it goes

 

[01Konvict]

+18 will fit like the stock wheels but alot more tire inside the fender, if any sticks out it will be under a 1/2". I'm pretty confident you will not have any rubbing issues.

 

[mcm1209]

So i got the 305 55 20 terra's
Very little rubbing at a little before lock backing up. Very happy with the fit