another tire size question.

I know a lot of you are going to say to use the search feature but im deployed right now and the internet is slow. So i have a three inch lift in my truck I was wondering if I get new rims what size offset/backspacing will I need to clear for minimal trimming if any?
Forgot to put in there that Its an 06 dbclb 4x4.

 

For what size tire?

 

yups forgot that too. im looking at getting 285-75-16s

 

4.5" bs will b chill, my buddy is running that bs with that size and has no rub issues...i have a 4.5" bs too w/o rub, but im on a 33/10.5/15 (285/75/16's are ~11.5" wide)

Edit: im talkin 1st gens, just reread that ur talkin 2nd gen...i think what i said still stands true though...

 

Any one have any idea what are bolt pattern is.

 

Well found the bolt pattern is 4" backspacing to much? And what is Hubcentric?