Wheel and tire size input????

I found a wheel and tire combo I like but I have a couple of questions. They come in 17x9" with an option of 00mm or -12mm offset. From all the reading I've done it looks like a -12mm offset will push the wheel out just shy of 1/2". So I'm guessing it will just look a bit stockier on the truck. But in a 9" wide wheel it could be too much??? Should I stick with 0mm?
I'm wanting to run bfgoodrich KO2's in 265/70-17. I've also seen some folks not recommend that size tire on a 9" wheel. I'm wanting to run these on a stock 3rd gen for the time being and don't want to rub at all. Your thoughts would be appreciated!!!

 

These are my rims with -10 offset with 4.3

 

9" wide? What size tire and any lift? Thank you for response!!! So the ones I'm looking at will be even wider with the -12. If I go this route I think the 0mm would work best. Do you agree?

 

thats a 17x8 6x135 5.5 rim and it sits good. But i also have bigger tires than what you're looking at. -10mm

 

The 17x9, ET -12, 4.5"backspace; will sit 61mm(2.40") further out.
The tire will sit 42mm(1.65") further out.
Scrub will increase 39mm(1.54").

The 17x9, ET 0, 5"backspace; will sit 49mm(1.93") further out.
The tire will sit 30mm(1.18") further out.
Scrub will increase 27mm(1.06").

Your stock wheel is 17x7.5, ET +30, 5.43"backspace.
Here's a calculator. I think a better choice would be a 17x8, ET 0 to +12, 4.5" to 5" backspace.
The rim will sit, ET 0/36mm(1.42") to ET +12/24mm(0.94") further out.
The tire will sit, ET 0/30mm(1.18") to ET +12/18mm(0.71") further out.
Scrub will increase ET 0/27mm(1.06") to ET +12/15mm(0.59").

 

Thanks guys for your input!!! I think I'm gonna keep looking. I agree with you splitbolt an 8" wide is a better option. Probably going back to the pro comp helldorado in a 17x8 with ko2's