Help with wheels and tires!

I just want to confirm, before I order, that I have the right sizes.

Tires - Open Country A/T 285/65/r18
http://www.rimzoneonline.com/toyo_LTCountryAT.htm#18INCH

Wheels - KMC XD Monster Size: 18 x 9
Bolt Circle: 5x127/5x139.7
Offset: -12
Backside Setting: 4.53

http://www.rimzoneonline.com/xd77818x9monsterblack.htm

For the tires, I had the choice of 'Pmetric/metric or 'light truck'. I picked
light truck, is this right?

For the wheels, will this size work? I'd prefer the wheel/tire setup to stick out a little bit from the fender but not too much. I tried reading up on offset and backspacing, but its still really just a different language to me.

Let me know you tire and wheel pros! I' also going to add Icon coilovers with Total Chaos UCAs, and a add a leaf with Bilstein 5100's in the back.

Have I missed anything?

 

What truck did you get? Most of them have 6 lug axles.

 

Oh man, that would have been a huge mistake. Its a Trd Sport 4 door 4x4.

Size: 18 x 9
Bolt Circle: 6x135/6x139.7
Offset: -12
Backside Setting: 4.53

Size: 18 x 9
Bolt Circle: 6x135/6x139.7
Offset: +18
Backside Setting: 5.71

Here are two other options with the 6-lugs. Which one?

 

Size: 18 x 9
Bolt Circle: 6x135/6x139.7
Offset: -12
Backside Setting: 4.53

^dis

 

What he said^
You need a 6x5.5" / 6x139.7mm bolt pattern though.
the -12mm offset is what you need. The +18mm would pull the tires in too far leading to tire/UCA rubbing.

 

Look at the weight difference between the Pmetric and LT. The LTs have more plys and are heavier. If you are mainly on road driving without towing or hauling heavy loads I would go with the Pmetric. If you are going to spend a lot of time on the trails or towing/hauling then go with the LTs

 

Size: 18 x 9
Bolt Circle: 6x135/6x139.7
Offset: -12
Backside Setting: 4.53