I run 30x9.50x15 with no rub at all, and i could deffinately go to 31's no problem.

 

Stock suspension?

 

I had a '88 XJ ,4 door, no roof over the rear,with trimmed fenders f/r, NO lift & had 33/12.50/15 on 3.75 b/s, they barely rubbed the rear @ full flex-could have fixed it with bumpstop extentions.
Seems like everyone has a different story to tell, so I guess it really depends on your perticular Jeep.

 

Was your suspension stock or what was it?

 

Yeah its stock, and I'm thinking that if i bought the bushwhacker cutouts that i could easily get 33's under there with spacers and bump stops. But even without them i dont think I'd have to much trouble with rub, probably at a really sharp turn and under full flex is all.

 

So you definitely think I can run 31s on my xj?

 

I would have to think so. Going up from a 30" to a 31" tire you're only adding 1/2" more to each side of the tire. I would just try to keep as skinny of a tire as I could, Stay with a 10.50 and I think you'd be ok.

 

How sure are you lol?

 

What size are you running now? I would just measure from your tire to the wheel well while its straight, and then turn your wheels and measure again. You will loose alot of clearance when your wheels are turned and that should be your best spot to be able to tell.

 

Alrighty. I'll give that a shot and see what happens. Thanks a lot man

 

I have 26s lol

 

No problem, good luck man.

 

Thanks. I'll let you know what I come up with tomorrow

 

With 31s on stock. Regearing necessary?

 

I think I would be ok but anyone know for sure ?