I generally have little trouble with tube tires. As long as you make sure that the tire bead is angled inside the rim depression on the opposite site, its generally fairly easy to stretch them over the rim.
Tubeless tires are another thing entirely. Those things are really tight on hour tiny 10 inch wheels. I always had trouble breaking the bead from the rim. Today, I had to remove the rear tire from my 150 Elite. I ran over a really bad pothole (courtesy of the Mayor of Seattle) with a passenger on board and shortly afterward the tire went flat. The tire was tubeless, but apparently had been fitted with a tube by the previous owner. To make things worse, the steel rim had some corrosion on the inside from water getting into through the valve hole, so the internal rim was no longer smooth. I struggled with my Black & Decker Workbench along with a G-clamp to break the beads. Managed to get one side off, but the other was a real b!$*%$#@r.
Then I came across this method online. I have to say it works like a charm. After several hours of effort this worked in less than 5 minutes. So for those who may need it (like with a Metro wheel switch) here's the source:
http://scgt.wordpress.com/2007/12/31/ti ... the-beads/
