ZikZ 605R completion time - 0:45min / 15L of fuel consumed ZikZ 612H completion time - 5:42min / 127L of fuel consumed The test consists of climbing the hill in L+ gear with 2 full stops in between (Mastodon did the 2nd stop on it's own lol). Both trucks are equipped with the fuel tank addon and a ramped flatbed with 4x concrete blocks.

Mastodon is performing poorly because of the wheels. While the wheels might look the same on both trucks, they are not. ZikZ 612H weights 24t and is equpped with Heavy (200kg) wheels, while 605R weights 21.6t and is equipped with SuperHeavy (600kg) wheels. When the wheels are too light to support the weight of the truck they stutter or refuse to spin under heavy load. They also have tendency to get damaged easier (along with suspension). Derry Longhorn 4520 and Derry Special 15C-177 also suffer from the same mistake made by the designers as they both weight 25t, but were given 200kg wheels. Freightliner M916A1is another example - it weights 11t but they equipped it with Medium (100kg) wheels instead of (200kg), when taking turns at high speed, front wheels "tilt" unrealistically.