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Golden rule for kV x pulley ratio?

Hello!

Was watching an electric bike design summary on YouTube and was presented with a anecdotal golden-ratio for motor kV rating and pulley ratio, in the attached photo.

Is there a similar rule for eBoards? Thanks.

Video by Tom Stanton (rule presented at 12:38) : https://youtu.be/1pm1RtCuE3A

I don’t believe there is a golden rule in esk8.

But you can get some more info about why some design are good & some arn’t from reading this:

Going off of my board, motor kV x motor pulley / wheel pulley * wheel diameter = 8000 for a board that can go a little over 25 mph comfortably and has good torque so staying around there would likely be good. I would however second what Monomas11 said and use an esk8 calculator like this one: http://calc.esk8.it/