Hello! Long time Zwift user here - since the Beta days two winters ago.
I just switched from a TACX Sirius manual variable resistance trainer to a used Kurt Kinetic Rock and Roll trainer model T-016.
I configured Zwift to use the Rock and Roll and ZPower mode for the wattage numbers however when I started my ride tonight my power numbers were all over the place by factors of almost 5X what they should be.
After I noticed the weird numbers I powered up my Garmin 810 and based on the values coming direct from my GSC-10 cadence/speed sensor I was riding at a targeted wheel speed of 10 MPH however my ZPower numbers were ranging from the low 30’s to over 400 even though my Garmin was showing a steady speed of approximately 10MPH.
I replaced the battery in the GSC-10 just the other day and my USB ANT+ stick is attached via an extension cable so the sensor is directly under my bottom bracket.
See the two events here:
https://www.strava.com/activities/861952860 => Garmin ride (which has the last mile or so of Zwift)
https://www.strava.com/activities/861953082 => Zwift ride
Any ideas why the numbers fluctuate so much? I don’t want to have to go back to the old TACX but at least using the Classic unsupported trainer mode I was getting consistent numbers.