31x10.5x15 tire and wheel help

[cplchris]

for anyone who has or has ever had a set of 15x8" wheel with 31x10.5 tires (MTs) what backspacing and offset will give me no issues with rubbing, from what i gather 4.5" bs and 0mm offset seems to be the way to go. my kj is a 2006 sport with 3.75" of lift (fender to hub is 22.75") the pinch welds are pounded and i will be ok with trimming the front bumper in necessary, as i am in the process of building a steel bumper, but i just want to be sure there will be no rubbing on the sway bar, uca (jba 4.5's) or the pinch weld.
thanks for any input,
chris

 

[NCC-1864]

I have the same set up with a 2004 .I'm at 23" in the front.
You will need to trim the lower front of your bumper to let the tire turn freely.
There is about the gap of a credit card between my caliper and the wheel.
No rubbing on sway bar
31" KM2
PROCOMP black rock wheels 15 x 8
ARB bumper
OME suspension
JBA A-Arm 4.5
JBA quick disco
JBA cut CV joint

 

[KJandCJ]

Might want to check this out.
WheelsAnything.com - Aftermarket & OEM Wheels Tires and Rims