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Why does Google Fit show such ridiculously different data from my Wahoo Bolt?

bryton wahoo google
screenshot of Bryton screenshot of Bolt screenshot of Google Fit

Most values look reasonable but trip distance and average speed are extremely implausible. (Bedford is rather more than a mile away from Oxford...)

The Google Fit data is imported from Wahoo, so I would expect the Google display to show identical data to the Wahoo display.

Background

I bought a second-generation Wahoo Bolt last week. I'm still learning about its functionality. First time I've navigated by GPS turn-by-turn.

My normal bike-computer is a simple Bryton Rider 410 (used mainly for speed and odometer) which is paired with an ant+ wheel speed sensor and a bluetooth HRM. I tried pairing them with the Wahoo without first unpairing from the Bryton. This seemed to work. However, when both computers were active only the Bryton saw them, so I deleted them from the Bolt (before the ride).

The Bolt app is configured to upload to Google Fit. I am not using Google Fit directly to measure anything.

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    Google does the same with data synced from Garmin I gave up using Google Fit for this reason. Plenty of info from a Google search has loads of users saying the same. It’s really not up to the standards of Wahoo or Garmin in terms of GPS accuracy and unfortunately it uses a basic distance / time taken to work out speed
    – Dan K
    Nov 3, 2021 at 17:42
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    @DanK Some links please? My googlefu is weak - I didn't find anything before posting here.
    – jhnc
    Nov 3, 2021 at 18:00
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    I have also had problems with the synchronization of Wahoo data to Google Fit, including rides that never show up or show up weeks later. I sent feedback on it to Google but haven't complained to Wahoo. Maybe if we both complain to both companies, and a few other people as well, we'll get them to fix it.
    – ichabod
    Nov 5, 2021 at 13:33
  • A man with a watch knows what time it is. A man with two watches is never sure.
    – mattnz
    Apr 19, 2022 at 3:49

1 Answer 1

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The answer seem to be that Google Fit is just very slow at processing. Not sure precisely when it updated but it now shows slightly more realistic-looking data (I think I trust the odometer mounted on my wheel more than distances calculated from GPS) although it has lost the speed graph:

updated google fit data

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  • Can you guess how long it took to come right? Surely not five months ?
    – Criggie
    Apr 19, 2022 at 2:15
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    I think it is common for these sites to do some extra processing after the initial upload. For example if you do a ride on a mountain bike strava initially gives you a very low average power estimate before updating a short time later. Regardless, thanks for coming back to give an update
    – Andy P
    Apr 19, 2022 at 9:10
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    @Criggie Sorry, haven't needed the wahoo since that ride and I only just thought to re-check. It must have taken at least a few days, given that the original post was already several days after the ride.
    – jhnc
    Apr 19, 2022 at 9:32

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