Originally Posted by
alcjphil
In which direction are you applying the force? To remove a tire from a tubeless rim you first have to push the tire bead inward towards the centre of the rim. This will create enough space to get your tire lever under the bead for removal
This is the key. For tubeless ready tires, it's really hard to just lever the bead off the rim like you can with "regular" tires. Get BOTH beads into the center of the rim all the way around before trying to get one over the rim to the outside.