In a properly coupled trailer, how much space should be present between the upper and lower fifth wheel?

In a properly coupled trailer, there should be no space between the upper and lower fifth wheel. This ensures a secure connection between the tractor and the trailer, providing stability and control during operation. When there is no gap, it minimizes the risk of the trailer becoming uncoupled while in motion, which can lead to dangerous situations on the road.

Having a complete connection also allows for the transfer of weight and forces between the tractor and the trailer, which is crucial for both braking and maneuverability. If there is any space present, it could indicate an improper coupling, which may compromise the integrity of the hitch and lead to accidents or equipment damage.

In safe towing practices, ensuring a tight fit between the fifth wheel components is essential to maintaining control and safety on the road. Therefore, a proper coupling means the fifth wheel should not allow for any gaps when the trailer is attached.