I personally don't like the look of 15" wheels, but I also don't rock crawl. I'm going with 18x9's or 18x8.5's (haven't decided yet). I'm putting 275/70R18 or 295/65R18 Duratracs on. Probably go with the 275's so I don't have to worry about rubbing.
Also, I'm not lifting at this point since I'll be towing and prefer to keep suspension stock to prevent any potential issues.
EDIT: Look at the largest tire on JK thread. There is a guy who posted some pics of 275's on like page 43 or so.
2012 JKU Sport Silver - Max Tow, Trac-Lok LSD, Auto, Sport S package, Hardtop.
I am considering going with 33' duratracs. What is the ideal rim size for these?
Whatever rim size you buy the tire for! Just kidding! There are really no performance advantages to running a certain wheel size. If you're running the 33's on stock wheels, you shouldn't have any issues with fitment.
You can go as small as a 16" wheel with no modifications. If you want to run a 15" wheel, you will have to grind the caliper bracket down slightly depending on the wheel. All I had to do was take a flapper wheel on an angle grinder and clearance it maybe a quarter of an inch.
Hope this helps! Feel free to PM me if you have any questions.
On Goodyear's Duratrac page, there is a link that allows you to see the specs for all available sizes, including allowable rim width. Google "goodyear duratrac specs" and the first or second link will take you to the page where the link is.
The guys at Discount Tire can help too. The sales guy I dealt with answered about a million questions for me before I pulled the trigger on the purchase.
I didn't do it. Nobody saw me do it. You can't prove anything.