i bought my first jeep this past november 2009 it came with 30x 9.5 stock my question how big of a tire can i go before i need a lift kit? i wanted to put 31x 10.5 MT's on but not sure if i can without putting a lift on.

 

Heythere,
Congrats on your new Jeep! A set of 31x10.5's should be about as big as you go without a lift.
Good Luck

 

31x10.5's will be fine on stock jeep. There may be a little rubbing when u turn the wheel all the way, but thats about it. I had Cooper Discoverer STT 31X10.50R15LT and they only rubbed when the steering wheel was completely cranked. So I just had to compensate when making U-turns. Now I got Pro Comp Xtreme Mud Terrain 35X12.50R-15 with no lift. I needed offset rims and trimmed a lot of body but it fits. I will be lifting it but until I can afford a good lift I'm just running stock suspension. It still rubs on cranked wheel turns just the same way as the 31's did and when Im driving fast and hitting dirt, it rubs against my tube fenders in the front just a bit.