[quote=Allan G]The problem is not so much difficulty getting the bead on, though that's a part of it. It's more about taking an hour to get the valve stem through the hole. Even with one of those fish tools, pulling the one bead out far enough while keeping the other one out of the center is darn near impossible.
David, as odd is this may sound, to get the valve stem through the hole, reach in from the side where the bead is already on the rim. If you push the tire laterally toward that side, you can reach around the bead and the hole is right there.