It's standard for a Powertap to talk to a Garmin Edge 705. There's even a video on how to set it up. http://www.youtube.com/watch?v=mNRGb...eature=related
The Garmin gets cadence and power from the powertap and stores it in TCX files. You can upload them to Garmin Connect and get all our reports. In the current firmware the torque is already zero'd out, so all you do is turn it on and ride.



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