With large dia., narrow tube type tires you lever the bead over both sides of the rim, the turn the rim 90 degrees to the tire an pull it out..Unless you are a gorilla, dont waste you time doing it that way with these wide low profile tires. These modern tires are easist to remove by levering both beads over the SAME rim edge. Here I have the first bead over the rim,,juiced up the correct friction surfaces real good, this required reaching inside, flipped it over and from this position, I pulled the rim out by hand..