I believe it. Even so, my experience with tires is that certain rim+tire combinations don't work. Of course that won't help OP; but it explains why some of us have more trouble with these tires than others. I have a Marathon Plus on the rear wheel (Sun CR-18 700c) of my tandem, and it's not particularly difficult to manage it. I have a regular Marathon on the rear wheel of my folding bike (Alex 16 x 1.5) and it's so loose I don't even need levers (but seating it can be tricky).