Solved (User Error) Beware of big change in Stryd Calibration Epix Gen 2??

I upgraded from Vivoactive3 to Epix Gen 2 recently. I moved my Stryd pod to the Epix Gen 2.

With the Vivoactive 3, the Stryd pod was very accurate when measuring distance on a couple of local running tracks. Unlike the Epix Gen 2, there is no option to use or not use the distance and pace from Stryd on that older watch. Stryd takes over these metrics when the Power ConnectIQ field is used and the GPS is turned off.

Howver with the Epix 2. after a few road runs, the auto-calibration found a 104,6% calibration factor. Initially, I dismissed it based on the Stryd knowledge base, set it back to 100% and selected to always use Stryd for distance and pace.

Over the last few days, I noticed that the Stryd distance on the Epix 2 was way off on the track. I would have to run about 20m past the 400m mark to have the watch record 400m. It adds up to almost an additional quarter km for a 5k!.

I recalibrated Stryd manually and got an average of 104.6% calibration factor after mulitple runs of various distances on 2 different tracks (between 4x and 12x400m). So the auto calibration was spot on (a testament to the Epix 2 GPS accuracy in normal running mode).

Speaking of which, the Epix Gen 2 GPS distance is surprisingly accurate in the Track Running Mode (the user manual indicates that at least 3 laps are required for the watch to auto calibrate in this mode).

I was not expecting that Stryd accuracy would be watch dependent! Did anyone else observe this?

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+1 cichykot over 3 years ago

I have been a stryd user since June 2016.
I had many different Coros and Suunto and Garmin watches during this period until yesterday with the F7X Sapphire.
The factor has been different from time to time, but is generally still the same 101.6
(he changed when switching from a old stryd to a wind one)
today / tomorrow I will get Epixa2 and I will write you what it looks like.

0 nonparametric over 3 years ago

I just don’t see how Stryd accuracy could depend on the watch it’s paired with. Distance is measured on the Stryd and sent to the watch, not the other way around. Changing shoes, or how tightly it is laced in, seems a much more plausible explanation.

0 TobiasLj over 3 years ago

Etupes25 said:
I was not expecting that Stryd accuracy would be watch dependent! Did anyone else observe this?

I have mine set to 99.1 which is what I got when calibrating on my F6X. After a few runs with my Epix I got a feeling that my runs where a bit short. I need more runs to compare with, but I don't think that the calibration did change there are other things that may impacted the first runs.

0 tmk2 over 3 years ago in reply to nonparametric

nonparametric said:
I just don’t see how Stryd accuracy could depend on the watch it’s paired with.

Calibration factor for a footpod is stored in the watch, not in the stryd. So, yeah, if you have two watches and two different calibration factors you will get different results.

nonparametric said:
Distance is measured on the Stryd and sent to the watch,

... where it is multiplied by the calibration factor.

0 NAVIEDIT over 3 years ago in reply to tmk2

The same for me: on the Fenix 6P I had a calibration factor of 100.0% for the Stryd, on the Fenix 7X SS I need 103.3% to get an accurate distance.

0 micro over 3 years ago in reply to NAVIEDIT

That only confirms that F6 under reported distance by 3.3% ;)

0 kaz911 over 3 years ago

My Stryd is at the same calibration it has always been - and is just as precise. I have never needed to adjust calibration - and my Stryd is still spot on at factor 100% as it was with my 5x,6x and now Epix 2.

+1 Ariel over 3 years ago

This is nothing to do with the watch. Autocalibration HAS TO SET TO OFF, calibration factor to 100. If you are still not satisfied with results do the manual calibration step by step: support.stryd.com/.../115004337834-Distance-and-Calibration

0 NAVIEDIT over 3 years ago in reply to micro

micro said:
That only confirms that F6 under reported distance by 3.3% ;)

But that can't be true. On my Fenix 6, I checked the distance with a calibrated measuring wheel: pressed the lap button every 500 meters. Garmin Connect then showed me between 490 and 510 meters for each lap. When setting the Stryd 100.0% and auto calibration OFF.

0 Teriemer over 3 years ago

I don't have any issue. I have pace from Stryd, but distance from Epix. Stryd is auto-calibrated and is in fact super accurate too. From earlier on track calibration test I have CF calculated to 102.6 - which is the same Epix gets- Really impressive.

I know that my watch/Stryd works perfect and I can tell when I see laptimes and compare them to current pace from Stryd.