On my 02 wrangler, I have a 4" rough country lift with 33-12.50-15 tires on stock steel chrome 5 spoke wheels. On the back there are 2 spacers that keep the tire from hitting the spring.
I know this is bad, have owned the jeep 1 week, and just discovered this today.
Measured the wheel backspacing, and I think it about 6". Measured from where the wheel bolts to the hub/rotor, to the inside edge.
Any suggestions on backspacing?
Wouldn't mind the tires sticking out more anyway . Then I will need some bigger pocket flares ....
Thanks for your help .

3.75" to 4.25" backspacing will work. You can use 4.5" back spacing, but you will most likely have to put a couple of washers behind your steering stops on the front.