The newer bike wheels with the rims that are designed for tubeless tires:

These rims pose a problem for getting tires off the rim - like when a flat tire and you still use inner tubes. Mounting tools did not address this situation, at least, not very well.

Consider a rider, maybe 5 feet, 3 inches, at 115 pounds. Do I really expect a small rider with small hands and arms to take the darn tire off without any assistance?