In the previous photo you can see that the tire is wet around the bead. It helps greatly to use some sort of lube both when mounting and dismounting tires. We use a soapy water solution in a spray bottle. Shown is “Euro Paste,” what our local America’s Tire uses which is also water-based. We never use any dino-based stuff due to fear of it reacting with the rubber. Also, glass cleaner or our soapy water solution will dry, but oil or grease will make it more likely for the bead to slip when aired down and wheeling.