5-8% difference in power readings between ERG turbo and bikes.
I train indoors and outdoors.
Indoors on a Wahoo Kickr Core, which is always calibrated before each ride.
I have two bikes outdoors, both with Rotor power meters, which are calibrated before each ride.
I am following a TR training program.
Unfortunately my Kickr seems to read my power output as being about 5-8% above the power meters on my bikes (which I am happy are correct). I’ve checked this by using a bike with power on the turbo, with the bike power meter transmitting to a separate device to my phone which talks to TR for power feedback.
The consequence of this deference I power reads is that outdoor rides are “harder” than they should be if I follow the power ranges for each workout and if I operate at a power output 5-8% less than guided the AI input shows me being less efficient and under-training during my outside workouts.
A solution would be a service if the Kickr in the hope any adjustments might bring the power into a similar range to the two meters on my outside bikes but that is hopeful more than anything else.
All this links through Garmin Connect so I regularly see blocks of “productive” rides on the turbo when a ride over reading power but showing a lower HR improves my perceived VO2 max and then outside rides show higher HR for comparable rides so “unproductive” as VO2 is decreasing. Whilst annoying, it’s something I can live with. I just want to ensure I’m training within the correct power parameters as increase my outdoor cycling in the better weather.
Can anyone offer experience on how they’ve adapted to deal with this kind of situation?
I found a 1.8 % difference between my Favero Assioma Duo pedals and my Wahoo Kickr v5. The value was an average, and varied a bit with the power as well. I solved this by moving my pedals between my indoor bike and the other bikes I use. And by doing this I do not have to worry so much about having a perfectly clean drive train on my indoor bike before doing hard workouts.