All the LR4's I looked at are 19 inch. 255/55/19. I looked at tires. But I may buy used so I don't know what it would come with. But I won't buy a LR4 with 20's. Sliders are not only for sliding. They are also protecting the body running board area. Just like underbody protection is for protecting the frame and undercarriage. When you off road you typically put the wheel over the highest obstacle. This then can cause the rock to hit the frame right where you have the slider or running board. It's not only about sliding but also protection.
An LR4 with 19's is less likely including other options too so be sure you know what you want and how to look for it. For example, if you do NOT want the nicer leather and some other features, then you do not want to find a used lr4 with 20's as it will usually have the higher options as well.
However, it's funny you say you "won't buy an LR4 with 20's" ...um, you might but saying that is a little goofy based on what your options are to chose from. It's either 19's or 20's and 19's are even more dumb than 20's because of so few tire choices in that size.
Regardless of which one, you're going to be buying 18's or you are not going to be needing any sliders whether it's for "sliding" or for "protecting"...which are the same thing. I don't think I've heard anyone ever say they were only for "sliding"
Mine are usually used more as "thunkers" or grunters because use of them often makes the passenger make strange noises
Frankly, your best choice is either to build out one on your own, or buy one that is already set up properly like AxelR on this forum who's selling one with 18" (you cannot just go to the dealer, or anywhere else, and jut buy an 18. There are only about 5 in the world that I am aware of to fit and none come from the US.
