Can't remove tire from UST rim
Busting a gut (and finger nails) trying to remove standard tires from Mavic 819 tubeless rims. "Popping" the bead from the groove in the rim should just be a matter of pushing in, and down, with your thumbs - but there is no way these are going to shift.
Both thumbs + all the pressure I can muster = nothing. It's like the beads are welded in there!
I've hunted around for answers, and come across a few individuals with similar woes. Sadly I have not come across a solution.