1997 JGC TSi.

What's the minimum lift I can do to safely mount 31" tires?

 

Do a 3in lift and u will be safe I ran 31/10.50 on my 98 with no lift but they did rub at full turn

 

the minimum would prolly be a 2" bb...but even then you might have to trim a tad bit

 

I have a 4 1/2" lift with 31's and they STILL scrub at FULL turn.

So unless you plan on hacking away at your fenderwalls and bumpers...

Go with the 4.5 or 6 and be DONE WITH IT...

 

Same here. Ran 31's on stock only rubbed a little bit at full lock.
Id say skip the BB and get a 3inch lift or something along those lines.
Christ. Whats your back spacing? you shouldn't be rubbing.

 

That's pretty crazy.

 

you have a prob if your rubbin 31s at 4.5"

 

Normally starts with "back".. and ends with "spacing".

 

I got a friend of mine running a 3" lift and 31's... and he said it only barely rubs @ full lock.. which he said he only does every so often... So I would say depending on the backspacing and the width of the 31 you run.. you should be fine @ 3" of lift...

 

They scrub my bumper, when hard wheeling, and at FULL TURN!

Not my fender walls...

 

Im at 2" and 31s no bub at all before i hacked my fenders on the roads but on the trail with the sway disco'd i did rub with lead to me cutting **** off. but 3'5 and 32s would be nice. Ill be on 5.5 and 35s next month just waitin on parts!

 

I'm running a 3.5 lift and have 31s with 2'' wide trail spacers ...simple wheeling no rub at all ..did have to cut 3'' out of fenders for extreme ..kept slicing tires

 

i have to say i have seen 31's on a stock zj, with a little bit of trimming

 

0" of lift and 31's, no rubbing after trimming

 

and that is an xj.....OP has a zj and this entire thread and section is on grand cherokees.