Our track has 21.5 2wd Indy buggy, 17.5 2wd and 2wd mod, 13.5 stadium truck, 13.5 wheeler, and 13.5 short course. I've heard that setup isn't nearly as important in stadium truck so I'm kinda leaning towards that direction because the 2 wheel buggy seems like its all about setup. I run 21.5 buggy atm