I just replaced my old 7 bike rack equipped 4x4 with a newer car. I ended up getting Thule Peloton racks for the car. I'm used to the old style quick release adapters - the ones with a lever and threaded nut on the other end to tighten down. This new Peloton setup where one pushes down the plastic front piece down to clam down somewhat scares me. I'll be using this car to transport different bikes, including a 53lb downhill bike. Is the Peloton reliable enough to transport such a tank-of-a-bike?

Any experiences/advice is appreciated!