Don't waste your time or money on 33s. 35s will fit perfect with the 2.5" spacer lift. Most of us here who received our JL's 1st all ran the RC 2.5" because it was the first out and yes even LiteBrite ran it. You'll be happy with that set up. Let me know if you go that route and I'll sell you one with shocks that I used a short time.I have a 18 JL sport s. I am trying to find out if it is a good idea to put on 35s and a 2.5 spacer lift. I have been told that works perfectly and that I should not go bigger than 33s since I do not have the Rubicon. I do some rock crawling and some trails. So far I have been runing stock and the clearance is staring to be a little of an issue with what I want to do.