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Stryd Calibration Clarification

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  • A Offline
    Aleksander H Bronze Member @Dimitrios Kanellopoulos
    last edited by 21 Apr 2021, 15:00

    @dimitrios-kanellopoulos said in Stryd Calibration Clarification:

    you never pair the stryd as a power pod

    Is this just a S9 thing? I’ve got mine paired to my SSU as a power pod and it’s working as I would expect it to 🤔 .

    D 1 Reply Last reply 21 Apr 2021, 15:07 Reply Quote 1
    • D Offline
      Dimitrios Kanellopoulos Community Manager @Aleksander H
      last edited by 21 Apr 2021, 15:07

      @aleksander-h oh yes… @fazel it might work if you pair it ONLY as a powerpod

      Community Manager / Admin @Suunto
      Creator of Quantified-Self.io
      youtube.com/c/dimitrioskanellopoulos
      https://instagram.com/dimitrioskanellopoulos
      https://www.strava.com/athletes/7586105

      F 1 Reply Last reply 23 Apr 2021, 14:29 Reply Quote 2
      • F Offline
        fazel Bronze Member @Dimitrios Kanellopoulos
        last edited by 23 Apr 2021, 14:29

        @dimitrios-kanellopoulos can you confirm a couple of particulars regarding the 9’s behavior when paired with the Stryd?

        Auto-calibration on

        • speed/pace and cadence as well as power from the Stryd
        • distance is from GPS

        Auto-calibration off

        • speed/pace, cadence, distance and power all from the Stryd
        • only track from GPS

        Also - can you explain how the auto-calibration algorithm behaves is auto-calibrate is left on continuously?

        • How often does it update?
        • Is old data thrown away? Only the most recent 15 min or so considered?
        • Or is it more complicated that that?

        Thank you!

        D 1 Reply Last reply 23 Apr 2021, 14:37 Reply Quote 0
        • D Offline
          Dimitrios Kanellopoulos Community Manager @fazel
          last edited by 23 Apr 2021, 14:37

          @fazel

          Auto-calibration on

          speed/pace/distance from fusion of gps and stryd. cadence as well as power from the Stryd

          Each time you run with autocalibration it updates a value called coefficiency.

          So for example if you run 1km gps based and stryd says 800m it will make the coefficiency factor higher.

          Then it always uses this factor to fuse the values mentioned above when running using the stryd.

          That factor is kept and used even if you turn autocalibration off.

          With autocalibration off it’s just not automatically updated.

          Community Manager / Admin @Suunto
          Creator of Quantified-Self.io
          youtube.com/c/dimitrioskanellopoulos
          https://instagram.com/dimitrioskanellopoulos
          https://www.strava.com/athletes/7586105

          F F 2 Replies Last reply 23 Apr 2021, 14:42 Reply Quote 2
          • F Offline
            fazel Bronze Member @Dimitrios Kanellopoulos
            last edited by 23 Apr 2021, 14:42

            @dimitrios-kanellopoulos Thank you.

            D 1 Reply Last reply 23 Apr 2021, 14:46 Reply Quote 0
            • D Offline
              Dimitrios Kanellopoulos Community Manager @fazel
              last edited by 23 Apr 2021, 14:46

              @fazel to wipe out that factor you can repair the pod. Then it’s last value is reset.

              Community Manager / Admin @Suunto
              Creator of Quantified-Self.io
              youtube.com/c/dimitrioskanellopoulos
              https://instagram.com/dimitrioskanellopoulos
              https://www.strava.com/athletes/7586105

              F 1 Reply Last reply 23 Apr 2021, 14:47 Reply Quote 0
              • F Offline
                fazel Bronze Member @Dimitrios Kanellopoulos
                last edited by fazel 23 Apr 2021, 14:47

                @dimitrios-kanellopoulos this much I know from trial and error! I feel like (for me) it might be better to leave auto-calibration on, but turn it off if I’m doing something like a trail run.

                H 1 Reply Last reply 5 May 2021, 04:02 Reply Quote 1
                • H Offline
                  herlas Silver Members @fazel
                  last edited by herlas 5 May 2021, 04:03 5 May 2021, 04:02

                  @fazel did you get any improvement in distance measurement accuracy with the calibration on for your stryd? Mine gives me a 400 meters difference (short) vs the Suunto 7 GPS for a 10K run, looking for options to have Stryd measuring as accurately as possible as it’s not a cheap device 🙂

                  thx

                  SRS Ti
                  A3P (drill mode for pool swimming 🤦🤷)
                  Galaxy Z Flip 3 / Galaxy S24+

                  D 1 Reply Last reply 5 May 2021, 04:37 Reply Quote 0
                  • D Offline
                    DMytro @herlas
                    last edited by 5 May 2021, 04:37

                    @herlas could this 4% error be mostly from GPS side? If you compare two measurements by subtracting, you’d have to add the absolute errors. So in case the both would have equal errors, you’d get 2% error for stryd, seems reasonable, ain’t it?

                    F 1 Reply Last reply 6 May 2021, 17:30 Reply Quote 0
                    • F Offline
                      fazel Bronze Member @DMytro
                      last edited by fazel 5 Jun 2021, 18:02 6 May 2021, 17:30

                      @дима-мельниченко @herlas @Dimitrios-Kanellopoulos here’s my story for today…

                      I set the calibration factor on the Apple Watch based on around 15 outdoor runs using an average of the difference in distance reported by Stryd vs the Strava corrected distance. This calibration factor was 1.017. I have since run with the Stryd and Apple Watch, and the Suunto with the Stryd paired as both a food pod with “auto-calibrate” turned on, and with it paired as a power pod.

                      Several days ago I unpaired the Stryd from the Suunto completely then re-paired as a foot pod and ran on the treadmill. What I found strange was the pace and distance reported by the Suunto/Stryd combination was directly in-line with what has been reported with the Apple/Stryd combination after setting the calibration factor. I have run with Stryd for several years on and off, and since I have five kids a load of that running has been on the treadmill in our basement. And since I am obsessive by nature, I am very aware of how far off the Stryd typically is uncalibrated when I run at my easy pace compared to what the treadmill is reporting.

                      I posted a question on the Stryd Facebook group asking them if the calibration factor was actually stored on the food pod, not the Apple Watch. They did not approve my question! They requested I email support instead. Support just replied saying the calibration factor is stored on the Apple Watch and I should make sure my Suunto watch isn’t doing something funky. But…I am not sure I believe them. I plan to run again tonight on the treadmill and see.

                      1 Reply Last reply Reply Quote 3
                      • F Offline
                        fluca Silver Members @Dimitrios Kanellopoulos
                        last edited by 7 Mar 2022, 07:34

                        @dimitrios-kanellopoulos Hello Dimitrios,

                        should this process work with STRYD v1 (HR strap version) connected as a footpod?
                        I tried yesterday but on the first run without auto-calibration I got speed approx 130 km/h and 25Km in about 8 minutes:
                        https://maps.suunto.com/move/ficheral/622488bf3776f1566320daf1

                        Second run with auto-calibration on did not improve:
                        https://maps.suunto.com/move/ficheral/622488c629c5c10fff6c48a5

                        Did I do something wrong or this hold version of STRYD is just not compatible if connected as a footpod?

                        Any help is appreciated,

                        B 1 Reply Last reply 7 Mar 2022, 16:41 Reply Quote 0
                        • B Offline
                          Brad_Olwin Moderator @fluca
                          last edited by 7 Mar 2022, 16:41

                          @fluca said in Stryd Calibration Clarification:

                          @dimitrios-kanellopoulos Hello Dimitrios,

                          should this process work with STRYD v1 (HR strap version) connected as a footpod?
                          I tried yesterday but on the first run without auto-calibration I got speed approx 130 km/h and 25Km in about 8 minutes:
                          https://maps.suunto.com/move/ficheral/622488bf3776f1566320daf1

                          Second run with auto-calibration on did not improve:
                          https://maps.suunto.com/move/ficheral/622488c629c5c10fff6c48a5

                          Did I do something wrong or this hold version of STRYD is just not compatible if connected as a footpod?

                          Any help is appreciated,

                          It is compatible but I have found v1 of Stryd (the only one I own) to be short on trails. Having GPS calibration did not seem to help that so I typically only use Stryd as a power pod. On the treadmill using as a foot pod worked for me but this was a long time ago as I rarely ever use a treadmill.

                          Vector/T6c/Ambit 3 Peak/S5 Copper/S3/S7 Ti/S9 baro Ti/S9P Ti/S9PP Ti/Vertical Ti/Race Ti/RaceS/Ocean/Wing

                          1 Reply Last reply Reply Quote 0
                          • BulkanB Offline
                            Bulkan Moderator
                            last edited by 7 Mar 2022, 17:49

                            @Brad_Olwin he is referring the previous version I think. The one was a chest strap. Not in the foot.

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                            flucaF 1 Reply Last reply 7 Mar 2022, 18:40 Reply Quote 0
                            • flucaF Offline
                              fluca Silver Members @Bulkan
                              last edited by 7 Mar 2022, 18:40

                              @bulkan thanks that’s correct. It is the HR strap version

                              Brad_OlwinB 1 Reply Last reply 7 Mar 2022, 23:17 Reply Quote 0
                              • Brad_OlwinB Offline
                                Brad_Olwin Moderator @fluca
                                last edited by Brad_Olwin 3 Jul 2022, 23:19 7 Mar 2022, 23:17

                                @fluca said in Stryd Calibration Clarification:

                                @bulkan thanks that’s correct. It is the HR strap version

                                Ah, I have that one too. Stryd is located near me. Their advice was not to continue using this one. The foot pod is far better. There were many issues attempting to get reproducible power on the Pioneer version. My understanding is this does not measure distance but I don’t clearly remember, that is why I thought you meant 1st foot pod version.

                                Vector/T6c/Ambit 3 Peak/S5 Copper/S3/S7 Ti/S9 baro Ti/S9P Ti/S9PP Ti/Vertical Ti/Race Ti/RaceS/Ocean/Wing

                                flucaF 1 Reply Last reply 8 Mar 2022, 13:09 Reply Quote 0
                                • flucaF Offline
                                  fluca Silver Members @Brad_Olwin
                                  last edited by 8 Mar 2022, 13:09

                                  @brad_olwin Got it, thanks.

                                  1 Reply Last reply Reply Quote 0
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