Most Campy wheels are notorious for being difficult. I snapped the Speed Levers within the first two seconds of trying to use them. So, save yourself the hassle. Go with steel or the Pedros, and put everything you've got into it. I doubt you'll be able to put the tire back on without the help of levers too. I get as much of the tire seated as possible, make sure the tube is tucked far out of the way, and then use the lever for, well, leverage to slip the tire back onto the rim.