Under what circumstance is a tire required to be moved during a safety inspection?

A tire is required to be moved during a safety inspection primarily when there is an audible indication of metal to metal contact. This scenario often suggests that the internal components of the brake system are making contact with one another due to excessive wear of either the brake pads or rotors. This can lead to severe damage and compromises the vehicle's safety, thus necessitating a more thorough inspection that may require the movement of the tire.

Moving the tire allows the inspector to get a closer look at the overall condition of the braking system, ensuring that any issues can be identified and resolved effectively to maintain safe operation of the vehicle. This proactive measure helps in preventing more significant problems that could arise from neglecting such critical mechanical components. The other conditions listed may indicate issues that require further inspection, but they do not specifically necessitate moving the tire in order to assess the situation.