Need some expert wheel advice.

[98vortech]

Hey guys I know everyone is sick of these type of threads but this is a good size investment and I need to ask a few questions before I order the rims.
I am looking at the Falken Koblenz. I am choosing between 3 sizes, 18x8, 19x8.5, and 20x8.5. Now I know the bolt pattern but I am confused on the backspacing for my truck. The backspacing for the 18's are 35, the 20's are also 35, and the 19's are either 35 or 25. I want the tires to be flush with the fender well. I really do appreciate you guys taking the time to help me out.
-Travis-

 

[Original_Ranger84]

Go with the 3.5, Inches? I'm guessing. But It might not fit flush with the wells, maybe 4" to 4.5" back spacing to fit flush although might rub on a full lock.

 

[98vortech]

sweet thanks. Anymore input?

 

[ILLEGALCONCEPTS]

I wuld think they are talking about the offset in mm.

35mm = 1.38 positive offset
25mm = 0.98 positive offset

The more positive offset, the further the rims will tuck in.

James