I had a rear flat in my spoked/tubes triumph 955 tiger on the motorway 10 mikes from my house. I had a full puncture kit with me. I used every trick in the book and that bead just would not break. I had to get the AA out after an hour on the hard shoulder.
Once home I attacked it a again with a long levered manual need breaker. Even in the jig, it wouldn't budge. It took me an hour with a can of wd40 and a crow bar getting it to separate. I can't remember the tyre.
I've changed hundreds of tyres by hand and on machines and that rim was impossible. No wonder they changed them to cast wheels after two years.
So !! The point is. Sometimes it's almost impossible with whatever tools you have.
Anyway, after that I sold the bike.
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Did some trips.
Rode some bikes.
Fix them for a living.
Can't say anymore.
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