my truck is bagged and the frame is Z'd 3 inches what backspacing will work for my truck i was thinking about 4.5-5 inches but i dont know if there will be any clerance issue, the wheels and Billet Specialties Vintecs 20x8 up front and maybe 20x9.5 out back. any help would be appreicated. thanks

With the changes made to your truck, I would suggest you physically bolt a wheel on that you know the actual measurements of & work from there.

You should be able to put a truck ralley (steel wheel) on & take some measurements where things are relative (suspension vs. sheetmetal). Add an inch here or there to arrive @ what works for your combo. I use stuff like pieces of wood taped to the wheek/tire to determine additional clearances required.

FnLow69, Where you at in Washington? I have a set of 20's that are the 9.5" wheels. I will find out the back spacing on them. If your close we can throw one on to see how they fit.

Im running 20x9.5 all the way around. 5.75bs up front 4.75bs out back.

Im running 20x9.5 all the way around. 5.75bs up front 4.75bs out back.
What size rubber you got on there? :confused: