There are technically no Rubicon springs, that said most of them are usually stiffer and taller than the other models. What you really want to look for are the numbers on the springs. I think the stiffest (tallest/most lift) are the 19s in front and the 60s in rear. On the part numbers those are the last two numbers. Just look on the plastic/paper tag hanging off of your springs to see what you have. The lower the number on yours the more lift you can get from a stock spring swap. there are also the 10th anniversary Rubicon springs that are taller than them all. I want to say most people clamed to get around an inch more than the 19/60 combo.