What rim back spacing to run 285's

Need some help with rim back spacing. I have read the forum and can't find what I'm looking for. I am going to put new rims and tires on my 09 tacoma (lifted). To run 285's what is the correct back spacing to avoid rubbing my UCA's. Looking for the perfect back spacing for 285's. I was also looking at Spidertrac spacers so I could keep my current rims but don't think I'm going that route. Thanks for any information.

 

4.5"

 

^^^ This. Works well for me.

 

works well for me too. at full LEFT lock i do get a small rub on my frame however. (17x8.5 -6mm offset wheels) 285/70/17
on 04 single cab 4x4

 

Thanks!!!!!

 

I run a 16" rim with 4.5" BS and 0 offset. Works great and only minor trimming needed.