I don't like anything bigger than 16" wheels on TJs. Those wheels look too big to me on a TJ. The reason they look okay on a JK is because of it's much larger wheel arches.
However, it doesn't look completely horrible. Personally though, I'd put 15" or 16" wheels on there. I like the look of a bigger tire and a smaller wheel.
But this is just preference, and that's only my opinion.