I did this by testing it on a 0 grade part of the course and maintaining 90 rpm using the Wahoo speed and cadence sensors. That said I can control resistance and the first thing I did was to estimate the appropriate resistance setting I needed to duplicate road resistance. Unfortunately, I can’t sync it with Zwift due to mechanical problems with my controller. I would completely agree with you that the Zwift estimation is not accurate but on a day to day basis it is consistent and will help you gauge progress. Those who can afford power meters and the many who are just getting into the sport. Hopefully Zwift will be able to use this data along with data posted by other users to help them improve the accuracy of their software for all riders.
I really enjoy Zwift and would encourage anyone to hop on the platform, with or without a power meter. However, once it passes about 540 watts the pendulum swings the other way and then it begins to underestimate power by well over 22%. In the lower power range zwift overestimates power by more than 30%. It’s pretty clear that Zwift’s estimates are off. Power was recorded from the Assioma Duo pedals and Zwift’s estimate. Speed was recorded using the Garmin 520 computer. Here are the results.Īll tests were done on the CycleOps Magneto trainer. Still unsatisfied, I got my hands on some Favero Assioma dual pedal based power meters, and did some real tests. So I did the best I could to compare Zwift’s power to CycleOps power graph, which I wrote about.
but I had no way of knowing if my power was accurate. I enjoy the challenge of competing with other riders any day of the week. I believe one had to complete 2 races along with some group rides and their training workouts to graduate. Less than one week in and I find out that the Zwift Academy has started. Because I know the speed I’m pedalling, and since the resistance of the trainer is consistent, I can tell very easily if I’m improving. I use a classic magneto trainer with a Garmin speed, heart rate and cadence sensor, which do the trick for me. In a way, it is my winter group ride replacement. I began using Zwift late last year for offseason riding.
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