Has anyone else checked the power output accuracy on their Kickr Bike?
I’ve just done Shredder, and compared data form the KBv1 with the Assioma Duo - I’ve long suspected than the bike produces a higher power output than the pedals.
Sticking the data into DC Rainmakers tool confirms with a delta of around 10w (just under 4%) across the whole ride, and consistent between intervals - representative image attached.
Anyone else the same?
Obviously don’t know if the bike or the Assioma are correct, and it doesn’t really matter I guess… I’m perhaps a bit weaker than the bike lets me believe
I did this a few years ago and found that my KICKR Bike V1 and my Assioma pedals differed by more than the tolerance specs on the devices allowed, with the KICKR Bike consistently being a few percent high.
I re-calibrated my Assiomas using their procedure with known weights, and the difference was still there. When I moved my Assiomas to my gravel bike and compared the power from the pedals and a SRAM spider power meter, there was essentially perfect agreement. Somehow Wahoo tech support was able to re-calibrate the KICKR Bike using a firmware patch, and all three devices lined up within tolerances.
Context - my weight varies 2-3% day-to-day depending on hydration. My power output (max or average) differs by more than 10% across different bikes and terrains. I am pretty sure my true FTP varies by 20% between a “good” day and a “bad” day, maybe more as my hip continues to deteriorate. 5 or 10 watts is really not much in that context, and my stop-and-go suburban outdoor rides are not comparable to indoor riding on a trainer anyway.
It was a personalized update, not sure if it has been undone by other firmware updates, for the reasons above I haven’t bothered swapping on the power pedals and comparing. Plus as I age and my joints deteriorate I’ll take any watts I can get, even the illusory ones…
