How to calculate your top speed setting using VESC and ERPM settings?

I’ve been searching around with no answer to be found, if there is a good summary please direct me to it.

I wish to understand how do I use ERPM to speed limit my top speed on my mountain board. I know it has to so with soft ERPM limit, gear ratio and tire diameter. Rather than just playing around with the values until I get the speed I want, is there a formula I can use?


I used this calculator. You have to play around to get it, but all the info is there. Just change # of cells up and down until the speed is what you need. You can then see the rpm at which will be what you need to set for that speed.{“batt-type-lipo”:1,“batt-cells”:8,“motor-kv”:190,“system-efficiency”:95,“motor-pulley-teeth”:13,“wheel-pulley-teeth”:36,“wheel-size”:97}|

Of course you need to set your other parameters accurately.

Good info. I calculated my top speed to be around 45Kph. It also calculated 49728 ERPM on a 7 pair pole (I am using a 14T SK3 aerodrive so this is correct). If I limit ERPM to about 25000 should I expect the speed to be halved?