Hello guys I am new here and just recently purchased an '08 FX4 SCrew. I Just purchased a 2.5" leveling kit from Hell Bent Steel and next is tires and wheels. I have chosen KMC XD Series 766 Diesel in a 18" but I'm lost after that with regards to BS and bore, etc., I plan on running a 325x65x18 tire and want very little to no rubbing without trimming anything. I have been searching this forum for 2 days now to prevent this question but seen so many different answers to similar questions. Here is an example of what I don't understand:
XD776 Diesel Black - 18x9 - 5x4.5 - 5 BS - 83.31 Bore

Other than the 18x9 being the rim dia x width what does the rest of this mean? Thanks in advance for any help.

 

im pretty sure that the 5x4.5 -5 is the bolt pattern and the bore is "The centerbore of a wheel is the size of the machined hole on the back of the wheel that centers the wheel properly on the hub of the car. Centerbores on wheels are typically a standard size by brand or size (measured in inches or mm)"

Hope that helps and i hope that these are right answers

 

That said it is a 5x4.5 bolt pattern, your truck is 6x135mm.
The 5 BS is a back spacing of 5", yours are 5.5",

 

Yep, that wheel won't fit your truck because it is the wrong bolt pattern. You need a 6x135mm bolt pattern. As for width and backspacing, I'd suggest a 9 inch wide wheel with 5 to 6 inches of backspacing. Also, with only a leveling kit those tires will not fit. You will have to lift it higher or step down to a 325/60-18 (33x13.00) tire. A 325/65-18 is basically a 35x13.00-18 tire. As a general rule on the new 4x4's with a leveling kit you can fit a 35x12.50 using the oem wheels or 33's with wider aftermarket wheels.

 

Ok, I think I'm on the right track..
XD776 Diesel Black - 18x9 - 6x5.5 - 5 BS - 108 Bore, is this the wheel I will need? Also with just a 2.5 leveling kit a Toyo Open Country MT 33x12.50R18LT will fit without rubbing? Thanks again guys for your input.

 

U still have the wrong bolt pattern. U need 6x135. and u may want to look for a little more backspacing but im not positive

 

Correct, 6x5.5" is not the same as 6x135mm.

 

Right, they will not bolt onto your truck. However, a 9 inch wide wheel with 5 inches of bs will work.