That's a pretty cool system. I went with Steady Racks, a bit more pricey, but I love the easy of use and ability to just roll the bike in. My wife complained about having to lift them up and hook them in. I have 6 racks. The rear wheel sits about 1/2 inch off the floor. For my road bikes, I like the racks specifically designed for bikes with fenders. The rack has a slightly smaller profile and less side to side motion with the narrow wheels.