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    Stryd Calibration Clarification

    Scheduled Pinned Locked Moved Suunto 9
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    • fazelF Offline
      fazel Bronze Member
      last edited by

      Can someone clarify the 9’s behavior if I turn auto-calibration on? Is the process continuous, or does it only last for 15-20 minutes initially?

      If the process is continuous, can I “lock” the calibration by turning auto calibrate off?

      Thank you!

      BulkanB 1 Reply Last reply Reply Quote 0
      • BulkanB Offline
        Bulkan Moderator @fazel
        last edited by

        @fazel never ON. Always off. That’s how I use it.

        Tu comunidad Suunto en Telegram: https://t.me/suuntocommunity (spanish)

        1 Reply Last reply Reply Quote 0
        • fazelF Offline
          fazel Bronze Member
          last edited by

          @bulkan this was my strategy too. But I’ve got a couple months of data now showing the Stryd to be consistently short. The calibration factor (Apple Watch) is 1.015. So, I’d like to try auto on the 9.

          1 Reply Last reply Reply Quote 0
          • Dimitrios KanellopoulosD Offline
            Dimitrios Kanellopoulos Community Manager
            last edited by

            I have the same issues with stryd.

            What you could do is find a good place with good gps reception (so that the device has excellent signal ) and turn autocalibration on and run like 1-4km.

            Then turn autocalibration off.

            It will keep that setting.

            To reset this value/setting just re-pair the pod and turn off autocalibration

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

            fazelF 2 Replies Last reply Reply Quote 1
            • fazelF Offline
              fazel Bronze Member @Dimitrios Kanellopoulos
              last edited by

              @dimitrios-kanellopoulos perfect. Thank you!

              1 Reply Last reply Reply Quote 0
              • fazelF Offline
                fazel Bronze Member @Dimitrios Kanellopoulos
                last edited by fazel

                @dimitrios-kanellopoulos Okay - I tried this and maybe I didn’t have good gps, but the next day’s track was way worse.

                Calibrated on a mostly straight track but trees and buildings were along the side so maybe that was the issue. The run was 2 hours and measured 22.81 KM. GNSS distance was 23.12 KM - so really not much different from the 1.015 average I’ve seen over a couple of months (on average using Strava corrected distances).

                https://quantified-self.io/user/Zj6gOpckgnhBQjWHN5Yno4rp0Bt1/event/3e46640d3a44e37e211296decd0d306a980f5461037b33cae368c89281c0f63a

                The next day’s run was 1 hour long on mostly the same trail but with some curves as I ran to it instead of driving. Auto calibrate was off. Stryd distance was 11.09 KM and GNSS distance was 11.61 - so a bigger difference (nearly 5% short).

                https://quantified-self.io/user/Zj6gOpckgnhBQjWHN5Yno4rp0Bt1/event/31849765f6f98b4d3a48da033e8698ba9a6ae7ee4b3773af785706d84146177f

                So - I unpaired the Stryd and re-paired as a PowerPod - but I guess that doesn’t work because the watch didn’t record power on yesterdays run. I guess it’s only the Ambit’s that allow you to just pull power from the Stryd but use GPS for distance and pace?

                Thanks!

                Dimitrios KanellopoulosD 2 Replies Last reply Reply Quote 0
                • Dimitrios KanellopoulosD Offline
                  Dimitrios Kanellopoulos Community Manager @fazel
                  last edited by

                  @fazel you never pair the stryd as a power pod

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

                  Aleksander HA 1 Reply Last reply Reply Quote 0
                  • Dimitrios KanellopoulosD Offline
                    Dimitrios Kanellopoulos Community Manager @fazel
                    last edited by

                    @fazel I would calibrate it in a more short distance. Like max 1Km

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

                    fazelF 1 Reply Last reply Reply Quote 0
                    • fazelF Offline
                      fazel Bronze Member @Dimitrios Kanellopoulos
                      last edited by

                      @dimitrios-kanellopoulos Okay - will try in a completely open area. Watch’s GPS is so good right now I really don’t need the Stryd for outdoors other than I’ve been using power for stress metrics and would like to be consistent.

                      1 Reply Last reply Reply Quote 1
                      • Aleksander HA Offline
                        Aleksander H Bronze Member @Dimitrios Kanellopoulos
                        last edited by

                        @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 🤔 .

                        Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 1
                        • Dimitrios KanellopoulosD Offline
                          Dimitrios Kanellopoulos Community Manager @Aleksander H
                          last edited by

                          @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

                          fazelF 1 Reply Last reply Reply Quote 2
                          • fazelF Offline
                            fazel Bronze Member @Dimitrios Kanellopoulos
                            last edited by

                            @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!

                            Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                            • Dimitrios KanellopoulosD Offline
                              Dimitrios Kanellopoulos Community Manager @fazel
                              last edited by

                              @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

                              fazelF flucaF 2 Replies Last reply Reply Quote 2
                              • fazelF Offline
                                fazel Bronze Member @Dimitrios Kanellopoulos
                                last edited by

                                @dimitrios-kanellopoulos Thank you.

                                Dimitrios KanellopoulosD 1 Reply Last reply Reply Quote 0
                                • Dimitrios KanellopoulosD Offline
                                  Dimitrios Kanellopoulos Community Manager @fazel
                                  last edited by

                                  @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

                                  fazelF 1 Reply Last reply Reply Quote 0
                                  • fazelF Offline
                                    fazel Bronze Member @Dimitrios Kanellopoulos
                                    last edited by fazel

                                    @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.

                                    herlasH 1 Reply Last reply Reply Quote 1
                                    • herlasH Offline
                                      herlas Silver Members @fazel
                                      last edited by herlas

                                      @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+

                                      DMytroD 1 Reply Last reply Reply Quote 0
                                      • DMytroD Offline
                                        DMytro @herlas
                                        last edited by

                                        @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?

                                        fazelF 1 Reply Last reply Reply Quote 0
                                        • fazelF Offline
                                          fazel Bronze Member @DMytro
                                          last edited by fazel

                                          @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
                                          • flucaF Offline
                                            fluca Silver Members @Dimitrios Kanellopoulos
                                            last edited by

                                            @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,

                                            Brad_OlwinB 1 Reply Last reply Reply Quote 0
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