We arleady have them on mass (Units of ballasts) and for time (Real life seconds).

Of course if we define some universal units, we should need a sample.

What do you think about this problem?

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Decided measurement units:

Mass: The ballast weight parameter.

Time: Real seconds.

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To decide:

Lenght: Probably meters, thanks to modders.

Rotation speed (alias RPM): Maybe a comparison with the Wheel Speed parameter?

Speed: Unknown, probably modders will come in our help.