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Kingpin to rear axle not advised?

Can anyone explain to me what this is and why it is not advised in certain areas? Just curious.


the kingpin is the coupler under the front of the trailer that the fifth wheel on the truck connects to,the distance they are talking about is from the king pin to the center of the rear axle (if single axle ) or to a point between the axles no a tandem axle trailer.anything over that lenght will have problems with tight corners or curve in the road causeing it to cross the center line. this is why the lenght advisory
May 28, 2018
This is for '18 wheeler' trucks where the lenght of 30' kingpin to rear axle not advised-- Terminology for road conditions specific to safe driving of their rigs. A trucker with a kingpin to rear axle of 30' or more cannot drive on the road.
May 28, 2018

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