1. how do you do the auto calibration that garmin suggests when it finds the powermeter? i know you leave the bike alone while, but should it be in a specific gear combo while? i noticed the calibration went from 330 to 430 when i switch from 39-28 to 39-12 gearing and then calibrated, but only did it once, so dont know if it was a glitch
2. my powertap has always shown 500-520 in calibration until about a month ago where it started drifting towards 430 where it is settled at now... the readings seem to be okay and comparable when it was 500 ich, so should i leave it at 430 or send it in to get it recalibrated by powertap? its still within warranty so ill just have to go without my wheel for some time.
3. what can change the value of the calibration? can things like the tightness of the cassette mounted (how much you tightened the cassette screw?), the qr release tightness? the gear combo when calibrating?
hope you can help me clarify it :)
thanks in advance
You might want to try the Powertap thread for your answers, not the Power2Max thread