Originally Posted by Rayko
While you're in the process of learning:
I would go with a 15" wheel if you're going to put larger and wider tires on. The 15" tire is cheaper than a 16".
Go with a 8" rim not a 10". The 8" will be much better if you plan to off road, When you air down it will hold the bead better than a 10" rim.
I believe that you will have more of a choice of tire sizes with a 15" rim than a 16".
You are getting some good advice here. The bolt pattern is absolutely critical, since those wheels just will not fit without adapters, which will indeed push the wheels out too far, put additional stress on the wheel bearings and other components, and is just not worth it. Buy the proper stuff once and then enjoy it. I agree that for a TJ with modest modifications, 15" rims are just fine. You can certainly run 16s and larger.
Enjoy your Jeep.