What is a key feature of a converter dolly?

A converter dolly is designed to connect a semi-trailer to a tractor unit, and one of its defining features is the inclusion of a fifth wheel coupled with a hitch. The fifth wheel is a crucial component that allows for the secure attachment of the trailer, enabling proper weight distribution and facilitating safe maneuverability. This setup is integral to the functionality of a converter dolly, as it enables the connection of a trailer that is typically heavier or longer than standard trailers that do not require such a complex coupling mechanism.

The presence of a fifth wheel, in particular, is significant because it allows for pivoting during turns, which is essential for maintaining control when towing large and heavy trailers. This feature differentiates converter dollies from other towing apparatuses that may not accommodate the specific demands presented by heavy trailers.

By contrast, the other options do not accurately describe the essential functions of a converter dolly, making them less relevant in this context. Specifically, a single axle does not provide the necessary stability for heavy loads, multiple hitches do not characterize the simplicity and efficiency of a converter dolly's design, and the exclusive use for recreational vehicles does not align with the broader applications of converter dollies in commercial transportation and logistics.