you'll rub.
the tire will actually be about closer than the stock tire does. not much. but still closer
your still going to have a 4.5" back space just like the stock wheels, plus the extra tire there.

-20 will put you right at where the stock wheel/tire sits compared to the radius arms. you shouldnt rub with this offset, though you still might with a meaty tire.

 

It's so hard trying to figure out what size wheels I need.

 

you only have to re torque them after the first 100 miles, then you should be good, but if you rotate your wheels every 3k-4k when you do your oil then you can check them then too, but you'll have to recheck the wheel to spacer again at 100 miles(just like you would have to do with a normal tire rotation.

trimming the stock studs isnt bad, especially if you have the speed studs (no threads for about half an inch)

yep -88 lol 15x10 with a 2" back spacing, only about a 1/4 of the tire sits under/inside the truck

 

go here LINK

fill out the stock tire and wheel in the first side. 235x70 r 15 with an offset of +1

then you can fill out the second one on what tire wheel combo you want. it is metric so fill out the rim info first then the tire and just look at the picture until you get the tire size( it shows inches)
315x65 r 17 -12 is the combo your looking at now.
the boxes below tell the new locations in relation to suspension, how much it fills out the wheel well(on a stock height vehicle), and new speedo reading.

 

According to that I could do 17x9 with a -24mm offset and be the same as I am now

 

Neat website!

 

that sounds about right, but like I said before you still might rub if you go with a meaty tire, but you could do that with a stock size meaty tire.

 

17" Wheels from 2003 King Ranch. I like oem wheels for their durability. Used hub centric wheel adapter/spacers.....they dont give em away, $250 bones if I remember right, might have been more.

Edit. Tire price kinda offset. 31x10.50 were about $200 more for a set than what I bought 255/65/17.

 

sounds about right, you can buy just 2" spacers for around $200 a set.

 

Ehhh I'd retorque them once a month or at least every 2k miles in addition to doing it for rotations. Trimming the stock studs is bad when you have less threads holding your wheels on. I wouldn't want to remove even 2 of them on my truck. Some people are fine with spacers, some aren't. I don't care for them unless you're going to really keep up with them, and most folks don't bother to. It would be a constant thing on my mind.

Whew! Those are really sticking out there then! Run through wheel bearings often? Haha