What safety feature is vital for preventing a trailer from swaying?

Proper load distribution is essential for preventing a trailer from swaying because it ensures that weight is evenly spread across the trailer and the towing vehicle. When the load is balanced, the center of gravity remains stable, which minimizes the risk of sway during changes in speed or direction, such as during cornering or sudden stops. If the weight is disproportionately loaded to one side or is too high, it can lead to instability, increasing the likelihood of the trailer swaying or fishtailing, which can be dangerous for the driver and other road users.

While the other safety features, such as chains, heavy-duty tires, and electronic stability control, do contribute to overall towing safety, they do not directly address the fundamental issue of load balance that is critical for sway prevention. Proper load distribution is the first line of defense against trailer sway, making it a vital safety consideration for drivers of trailers.