Is there a third party that confirmed Stryd's accuracy? Robijn November 07, 2020 21:08 Updated Follow Stryd is accurate out of the box and does not require calibration for most runners. Do not take our word for it, check this article on FellRNR.com. Related articles Distance and Calibration Garmin Compatibility with Stryd Critical Power Why does my HR go up on an incline even when keep my power the same? Why is my power delayed when running intervals? Comments 0 comments Article is closed for comments.