LEGO has released a new and rare video on the LEGO Ambassador Network featuring designers talking about the design change with the train wheels. The new wheels uses plastic instead of the metal axle and it allows for more flexibility when building your trains but there are other benefits. During the side by side comparison, the trains with the new wheels went around the track faster and it also improves battery consumption. Since the train wheels are made from plant based materials instead of using the metal bar, it is cheaper for LEGO to produce and that is passed down to us by giving more bricks in the sets. If you have any questions or comments about the new LEGO train wheels, feel free to leave them below and LEGO will be gathering feedback and try to answer questions about it.