sorry for yet another noob post...seems like that what my account has turned into. Ive done a lot of searching and I cant find a definite answer on this. I need to know I can run 33.3x13 tires with no lift and 4.5 backspacing without rubbing. it probably wont ever see any off road more extreme than a hardcore dirt road. thanks.

 

Yes, 4.5 backspacing is plenty for a 33.

 

even with 4.5 BS you may get some rubbing on your suspension components while turning, especially with a 13" wide tire. search steering stop adjustment for an easy fix.

 

I've run two different sets of 20x12 with a 4.56 backspacing with 38x15.5x20's and have never rubbed on the street or flexed. Your fine.

 

With 4.5 bs and 37x13.50r17 I rub my shock reservoir on drivers side at full turn. Other than that, all good.