ok so i plan on using the rough country 3" series 2 kit and 15x7 wheels with 4.5" backspace . i need to know how big a tires i can use ? hoping for 31x10.5x15 ?????? thanks for the help

 

31x10.5's will work, Most will go for a 15x8" rim but yours will work.

 

ok so would 32's be pushing it ? and would that requier alot of triming ?

 

32" should fit with some trimming and bumpstops. I do prefer the look of bigger tires with smaller lifts.

 

You can fit 35's if you want. I run 33's on my 3" and i love it.

 

And no, it doesent take too much truimming. Your bumpstopping is more important.

 

My 31s rubbed the bumper end caps

 

Omg...

 

Ha ha... whats a bumper end cap...

 

My current XJ ('92 Laredo) had 32's on a 3" lift and stock rims when I got it. The front tires rubbed the LCA a little at full lock but didn't rub the fenders or flares any and the tires sat pretty close to the rear springs. I went back to 31's and they just barely rub the LCA's at full lock. Just waiting for a little cash to get new rims. So yeah, 31's will fit fine on a 3" lift and 32's would be OK. For 33's (or larger), I would get better rims (for the offset and backspacing) and do some trimming.

 

GF runs JK 32's on 3.5" of lift no problem. just need minor trimming on some of the plastic trim crap

 

the corner pieces of stock bumpers (front and back) are removable caps.

 

My buddy ran 32s on his 3" lift with only a little bit of trimming.
And if you only have a little bit of rubbing like I did after my lift, you can do what I did and pull off the flares & endcaps and re-drill the mounting holes to open up the wheel well a bit to clear the wheels.

 

That was sarcasm for I assume he has removed those based on his avatar pic