A frequently asked question, in the appendix the answer. – mass red. stands for the actually rotating mass of the component – mass red. total including the number, e.g. 4 wheels – mass equalient trans. stands for the assumed mass that the rotating component would correspond to with a partial train mass. A ZMS (two masses flywheel) corresponds e.g. 205 kg – pull total stands for the actual percentage of the rotating components to the total pull force. Here you can see that the large load ms discs (simplified 4x 380 mm assumed) for a translation e.g. first gear with 4. make up only 0.65%.