We decided to put the proven 15-ton tandem TDK 1500 tractor trailer to the challenging test, to perform a full evaluation and conduct various skill tests. Over the course of three days, we performed tests in order to determine how the trailer and its vital parts respond in all these extreme conditions. On a variety of difficulty tracks, under a full load, we tested the durability of the chassis and suspension, accuracy, responsiveness and steering efficiency. We tested the brakes, the functionality and durability of the materials, measured the gradients and deviations. We used all of the acquired data to perform a detailed analysis which will surely help us make numerous improvements and innovations in the future. This way, we test the upper limits as our goal is to constantly ensure quality, durability and, above all, safety.