[lolife99]

Originally Posted by bolivier

Here is what I'm looking to buy. http://tulsa.craigslist.org/wtd/5797199333.html

I'm going to put 275/40 up front with 315/30 in the rear. Should the backspacing on the front wheels be more like 5.25 instead of 4.75?

Backspacing on wheels is DIRECTLY related to wheel WIDTH.
You cannot talk about one without the other.

What width wheels are you trying to fit on the front of your truck?

And wheel DIAMETER will also affect the amount of backspacing you have before the wheel lip makes contact with the lower a-arm (backside) or the fender opening, (front side).