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    I use a bike with a powermeter on mine, so don't need to use the turbo derived power, however the calibration is a simple spin down which you can trigger from the iPhone app.

  • Having a trainer that displays power is a good way to cross reference different power meters. I was tempted to buy the watt box for my Lemond so I can do such. I used my rollers in the end.

    Useful to establish a base line of variance.

  • ...1...

    you can trigger from the iPhone app.

    Or just riding at 40kph.

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