I was looking at my ride from Saturday and I noticed a rather significant difference in the Wahoo, Strava and TrainerRoad KJ calculations. I would think KJs are a rather absolute measurement, unlike something like IF or TSS, so disappointed to see a 24% difference between headunit and TR.
Any explanations or what should be considered the source of truth? Worth submitting to TR support?
Only single digits/ .3% between Strava/ Bolt/ TR for me from my spin on Saturday.
kj = kcalories is what TR use. Strava and TR pretty much matching, so Iâd suggest itâs the Wahoo thatâs off? What was the head unit showing at the end of the ride?
fwiw, I seem to be having lots of updates to my bolt, and when I went into the app just now, I noticed it had my as recording on a âroamâ rather than âboltâ.
Anyway you can look at the raw data? Golden Cheetah or WKO? Strava and TR might be reporting based on correcting the gaps in recording. Itâs an odd behavior because when I upload my RGT Cycling ride file (raw), they donât correct for the gaps. Looks like Wahoo is uploading extrapolated/massaged dataset but not display it on their side. Never happens with my Garmin or IpBike (app).
All apps/computers calculate slightly different for a variety of reasons. If you are following numbers pick one and ignore the rest. Lol, I pick garmin, for me its always 0.1-.0.2mph faster and 1w higher and its the one thing Iâve always got with me indoors or out
It always is, different app/computers collect slightly different base figures based on autopause and tons of other variables, they then process it with other factors which magnifies their differences in guesstimates of Calories etc. Donât get hung up about it, its just the way it is, just pick one and follow that and ignore the others
Wahoo looks off to me. It looks like you stopped for an hour, or so, so looking at moving time, looks like about 4 hours 10 min. so time in seconds is 4 * 3600 + 10* 60 = 15000 seconds, times 194 average watts is 2,910,000 J, or 2910kJ, which is much closer to TR and Strava.
Should be, but from time to time things will be different but your original power averages are different so it wonât be. Maybe its the method of recording (recording 0s) or autopause settings or simply gps interference. Donât get to hung up about just use one thing and follow it. Night
Thatâs correct on stoppage time, I got colder than I think Iâve been on some early ride descents and it took me about 45min and 2+ cups of coffee to stop shaking!
So did you have two recorders, Wahoo headunit and something recording TR? TR instead of Strava because Strava canât pair with any sensors (on my phone and as far as I know). Is it the same ride file uploaded to the three app? If so only thing that explains it is Wahoo selectively reading the recording or itâs reading the raw data without fixing gaps in recording. Gaps in recording is not the same as stopped or paused in recording. (TSS, average speed, power, etc will matter if itâs one continuous file. Wouldnât matter for kj anyways.) Durationwise theyâre typically a second or so and thereâs no sensor data at all. Thereâs no user defined duration with Garmin (and WKO) as far as I know. Default is 1 second for Golden Cheetah. Thereâs no reason to extend that and for you case 45 minutes. Again wouldnât matter for kj anyways.
No, just bolt headunit and it automatically syncs with Strava, TP, etc. I didnât fool with anything. Itâs interesting that the âsourceâ of the data may be the least accurate.
I noticed this exact problem when riding with my Favero Assioma and Wahoo Bolt. Itâs not a problem with the pm, but with Wahoo. For some reason their headline average power and kJ calcs are just wrong for this pm. When I raised a ticket with them I got a shoddy response to the effect that they knew about it and werenât going to fix it. I donât have this problem with my Quarq.
Itâs weird, because the raw data Wahoo is collecting is correct so when I load into Golden Cheetah or TR itâs correct, but on Strava and Wahoo the maths just doesnât work and is out by about 20%.
I spoke to Wahoo about it and went through their troubleshooting. They acknowledged it didnât calc right. Just the simple kJ formula from average power and time didnât stack up. I donât believe itâs an auto pause issue in my case. But I also donât know what else it is or why Wahoo werenât planning to fix it as it seems pretty fundamental to me for an expensive headunit to display the correct average power and kJ from a popular and reliable power meter
Is it the head unit or the Wahoo App though? Given it went to Strava and TR pretty much ok, what was recorded on the head unit was correct. Itâs the wahoo software thats the issue post ride. Well at least thatâs what it looks like to me.
I usually display KJ (which matches calories since an update over a year ago, when paired with a power meter). You could compare what you have the end of the ride, and then with whatâs uploaded to various platforms.
What does the history for the rides on the actual device show? I can see the kjoules under âpowerâ when I go to âhistoryâ on my bolt.
