This jeep has a very universal design. The dual king pin settings in the front coupler are made so it can be used with a tandem or tridem truck. There is a pin on the axle attachment at the rear of the trailer so it can receive an additional axle. The extra long slide on the fifth wheel is meant to adjust the weight division between the truck and jeep. This universal design does come at a slight increase in tare weight. In total, the jeep can make 4 combinations.