Depends on who you ask, and what you intend to do with your Jeep. 2" will juuust get you by, especially if you add long enough bumpstops to keep the tires off the flares as the axle articulates. You could drive it on the street, but not much more. 3" will clear, yet still won't require any special control arms, although in either case, you will need to lower the transfer case a bit, or do some other more extensive modifications, or you'll get some nasty vibrations due to the change in the angle of the driveshafts. Gearing of the Jeep will be affected, so you will feel like you're down on power. mpg will go down, speedometer will read slow. I see your just joining us, so search around a bit, and just be aware that there are a number of things to consider when you want to put bigger tires and wheels on your Jeep. That great price may end up costing more than you think once you start into it.