I've a wheelset where the rim+tyre (Halo Devaura + Conti Gator Hardshell) seem nigh on welded together. Almost impossible to get a lever in between rim and tyre. Almost impossible to manipulate the bead away from the rim, though I accept my technique may be at fault.
Any tips or tactics? I'd dread fixing a visitation out on the road, as it took a lot of effort and swearing to get one tyre swapped in the comfort of my dining room.