Cycle computers - what do they measure?

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  • Tank-slapper
    Tank-slapper Posts: 968
    Some good points raised - thanks. I'm glad that you aren't all in the "get out more" camp.

    Anyway, my Edge 500 does have GPS capability and onboard mapping (of a sort). The magnet sensor (GSC10) is an add on. Here is what Garmin say about it when used with the Edge 605/705:
    Distance, speed and cadence are calculated using different methods when a GSC 10 Speed/Cadence Sensor is used on an Edge 605 / 705.

    The information is calculated as followed:

    Distance - The Edge 605 / 705 uses the GSC 10 speed to calculate distance. If the device is not using a GSC 10, then distance is calculated by GPS.

    Speed - If the GSC 10 is being used, but it is not calibrated then the speed information will come from GPS. If the GSC 10 is calibrated, then the speed information comes from the Speed/Cadence Sensor.

    Cadence - Cadence will always come from the GSC 10.

    Can we conclude from this that Garmin think the magnet/sensor measurement is more accurate?

    I will try getting out more and ride a route using both magnet/sensor and GPS only to see what happens. Report back in a couple of days.

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