alright... i need to buy some cragar soft 8's... but i cant seem to understand tires.. can someone tell me exactly what i need. with some backspacing. i have a 3 inch lift.. so i want close to max without rubbing... sorry.. =(

 

What size tires are you running? If they are 31x10.50 then you want 15x8 with around 4-4.25 backspacing.

 

i want to run big swamper tires... and will that backspacing make my tires stick out past fender?

 

+1 on this.
With a 3" lift the biggest tires you can really run are 31s without trimming the fenders if you want to have any kind of flex. The 4-4.25 backspacing will push the tires out to where they won't rub on the body. I had to get a little crafty with a sawzall on my plastic fender flares because my tires were rubbing them while turning, but this was not a big deal.

When dealing with rims, a lower backspacing will push the tire further to the outside of the truck. So your tires would be more likely to stick out to the edge of the fenders with a 4" backspacing than with a 4.25" backspacing for example.

Hope this clears things up.