This specific version of "Trailer Tr4 MkII” fits and works perfect with LEGO® Technic set 8258 Crane Truck. This LEGO® Technic set 8258 Crane Truck needs to be slightly modified. Free instructions on how to modify your set are available!
The trailers features: solid axle suspension on all axles, one set of lights, the jeep has both a kingpin and fully functional fifth wheel and both have manually operated landing gears.
Different states, different regulations! Depending on the combinations overall weight, so the total weight of the truck, the trailer and the load, more axles might be required. Adding axles however is not that easy, it's not that you go to your local dealership and ask them to add an extra axle to your truck and trailer.