I am using the Zwift Runpod and after a few tries I was able to get my calibration to a point that the speed it shows I am running in the app is very close to what my treadmill displays says. However, when I joined my first group run last week, with no changes to the calibration, it said I was running much faster than my treadmill readout. For instance, setting the treadmill to 5.8 mph gave a speed reading of 7 mph in the app. Doing a training run, the calibration was accurate again. Any ideas what could be causing this and how I could fix it?
(Based on other topics in the forum I’ve gone and purchased an NPE RUNN device but I’m still curious what the problem is.)