I have a Saris, that the wheels sit in the slots. Have had no issues. It even came with a 1 1/12" and a 2" hitch adapter. Nice if I wanna put it on the girls car. At high highway speeds, like 75mph or so, it rattles a bit, but other than that it rides nice. Very nice for bikes with very slope downtubes or FS bikes. I got the big one, 4 bikes, but should of only gotten the 2 bike model. Nicer than having them pilled in the back of the truck sliding around and ****.