Stryd is designed to be accurate out of the box without calibration for most runners, but there can be variation between runners and devices. You can always fine-tune Stryd's accuracy to improve it. To understand the exact accuracy of your Stryd, you need to run a known distance. We recommend heading to the track. The detailed procedure: Distance and Calibration
If you are do not have access to a track or prefer to avoid the hassle of the test, you can use the Garmin auto-calibration feature to finetune Stryd calibration. Autocalibration can cause unexpected results when you are in an area with poor GPS reception or are not running on a straight road. Curves and turns will confuse GPS and cause autocalibration to be incorrect. Never leave autocalibration enabled on your Garmin.
1. You must find a road that has a straight segment several kms/miles in length without any elevation change. There should be no multi-story buildings, trees, or other obstructions nearby to optimize the GPS signal. Example:
2. Go to the sensor and accessory menu on your watch and make sure that Stryd is paired as an ANT foot pod only (remove FP-STRYD if present).
3. Check the settings for the foot pod. Make sure pace and distance are always from Stryd. Enable auto-calibration on your watch.
4. Go to the beginning of the stretch of road that selected in step 1. Let the watch find GPS signal and wait at least 5 minutes (you can do this by going to the run menu on your Garmin and wait one screen before starting the recording).
5. Start recording the activity and run the straight segment only. IT should be a distance at least more than 1 mile or 1.6km. Stop the watch.
6. Go to the sensor and accessory menu on your watch, and change the foot pod settings. Disable auto-calibration on your watch, the watch will retain the calibration factor.
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