How does Spivi® compute speed?

Spivi® uses a chain of ordered methods to get the most accurate results of speed.
It starts with the first method and continues to the next one if value wasn’t computed. If the method succeeded Spivi® uses the returned value to display the speed.

  • Hardware based method
    Some fitness equipment devices provide their computed speed. In that case Spivi® will use this direct value for displaying the speed.
  • Power based method
    Any bike with power console that transmit it out will fit to this method. Blade ION, Schwin AC Perfomance w/MPower Console, FreeMotion etc.
    The output power in WATT is converted to Speed in KPH units based on standard power curves.
    Note: In this method the speed displayed on the bike’s console will be different from the speed displayed by Spivi since each vendor uses different conversion formula. As side effect the computed distance will be different as well.
  • Cadence based method
    This method is based on linear conversion factor to convert RPM units to KPH units. The default value is 1/3. I.E value of 90 RPM will be converted to 30 KPH.
 

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