Abstract: Disclosed is a truck comprising a hanger having a first pivot support and a second pivot support and an axis of rotation passing through the first pivot support and the second pivot support, a base having a structure providing the first pivot support, a pivot arm attached to the base providing the second pivot support, a pivot bushing passing through an aperture of the base, a kingpin passing through the pivot bushing, the base, and the hanger, and a locknut arranged at an end of the kingpin. In at least one example embodiment the first and second pivot support structures prevent an axis of rotation of the hanger from moving as the locknut is moved along the kingpin.