At the beginning before I start pedaling, I kick the freehub a few times to demonstrate the difference between the noises. Around the middle of the video, I deliberately kick the freehub while pedaling to show it again. The popping sound I’m concerned about happens under normal circumstances while applying constant pressure with resistance from the trainer. It is happening at normal cadences of 70 - 80RPM and is not from erratic pedaling at high rpm or freehub kicking.
