Tacx Flow Smart 2240 under-reading power vs. power meter pedals

I have suspected for a while that my Flow Smart 2240 is under-reading power as I have done a few Zwift TT races and whilst I class myself as only an average rider I strongly suspected my power was off as my FTP seemed low and I was consistently being beaten by Tri-club team mates who I normally beat quite convincingly in road TT events. This weekend I borrowed a pedal based power meter and did a custom workout power test on ZWIFT in ERG mode holding 100, 150, 200, 250, 300W to check the calibration of my turbo whilst the power pedal meter was displaying power in a Garmin head unit and the pedal power meter read ~70W higher at all power levels. Anyone got any ideas on the cause of this or suggestions for what to do about it? Thanks

0 Alex Masalovich over 3 years ago

Since you have the ability to adjust the force of pressing the roller to the tire, then calibrate the trainer according to the readings of your power meter. To do this, first set an excessively strong pressure and carry out the calibration, the value of which will remain in the trainer's memory. Then release the pressure step by step comparing the power meter reading with the data the trainer is sending to the app.

0 PropelRider over 3 years ago in reply to Alex Masalovich

Thanks for the suggestion. But do you think I can recover 70W via that method?

0 Alex Masalovich over 3 years ago in reply to PropelRider

PropelRider said:
But do you think I can recover 70W via that method?

Check it out in practice. The answer depends on the acceptable range of variation of the coefficient (multiplier), which is determined by the calibration results. For Genius, that would be possible.