31x10.5r15 w/ rockcrawler...backspacing? with Rusty's 2 in

[p-sims]

I found a sweet deal at Tire Package.com --

$818 for 5 SS TrXus M T's and rockcrawler wheels
mounted and balanced
shipping included

But here is the dillemma-- what Backspacing do I get? Will I be okay with the 4.5? Ive heard horror stories about 3.75 in backspacing... turning radius all screwed up, and they stick out too far for any off road use... etc.

What do you guys think?

Also what kind of trimming will I have to do with either backspace?

input needed
thanks guys

 

[aB²]

I've an 05 Liberty with 2.5" lift, and I bought the rockcrawlers, the 4.5 backspacing doesn't fit, the tire will destroy your Libby haha, at first I tried to mount a 4.5 backspacing, and that looked awesome, but believe me, it's doesn't fit... then I tried the rockcrawlers (4" back spacing) and that fits good, but... you've said that you have a 2" lift, so I can't assure you anything =/, so first try to fit the wheels and tires in the truck before you buy them :-k ... here are some pics of mine, so that you can see the 4" rock crawlers, and I really love them =P~

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[p-sims]

2.5

oops
Im gettin the Rusty's 2.5 in lift, they dont make a 2 in lift haha