Originally Posted by Riveting

Hanging the weight (aka Calibration) is typically not neccessary, though I believe the Stages instructions called for it when you mounted the PM yourself (but I read that several years ago when I was researching which PM to buy, I went with the PowerTap G3 hub), and that may no longer be an option. Here's a quick article that discusses calibration vs zeroing: https://powermetercity.com/2016/03/1...s-zero-offset/