Replacement components for Bont Tracer plates. These parts will fit the 20-degree Bont Tracer Derby and some of the components for the 7-degree Tracer NTS plate. They will NOT fit the Bont Athena or Zeus plates. Parts: 20-degree truck, for Tracer Derby (this will NOT fit the 7-degree Tracer NTS), sold singly (1) Steel kingpin, sold as a set of 4 Kingpin Action Nut to adjust the lateral play of the truck assembly, sold as a set of 4 Kingpin Spacer Thrust Washer, sold as a set of 4 Floorside cone cushion retainer cup, sold as a set of 4 Plateside barrel cushion retainer cup, sold as a set of 4 Pivot Cup, sold as a set of 4 Toe Stop Set Screw, sold singly (1)