Is it true that often the first clue of a potential rollover is seeing trailer tires lifting in the mirror?

The statement is true because observing trailer tires lifting in the mirror is indeed one of the initial signs that a rollover may occur. During maneuvers, particularly sharp turns or when navigating uneven surfaces, a shift in weight distribution can cause the trailer to become unstable. When tire lift is noticeable in the mirrors, it indicates that the trailer's alignment is compromising its balance, which raises the risk of it tipping over. Recognizing this early warning sign allows the driver to take corrective action, such as adjusting speed or steering to regain control and prevent a rollover. This awareness is paramount for maintaining safety while operating heavy vehicles, as rollovers can result in severe accidents and damage.