If you’re on a Kickr direct drive smart trainer and have been using smaller gears in Erg mode because it is quieter, you might be missing the mark in your training sessions.
While there are lot of guides out there telling you that gear selection in Erg mode doesn’t matter, it’s not that easy. Especially when it comes to the Wahoo Kickr and the 12.5Lbs/5.6Kg flywheel.
This video explains the differences using the same power and same cadence with different gearing on the Wahoo Kickr.
The take-away: make sure you’re training in the right gear which replicates the exact kind of training you’re targeting.

Eric,
I am using the same trainer as you in the video but V5. I thought you answered my question until the end. While doing a workout that gave a 2x FTP and then drop down to 50% FTP my flywheel is going so fast I can’t stay “on top of it” as you say. And often the erg mode disengages and I loss a star for that segment. Should I be doing the workout in a lower gear? Or should the program have a 10 to 20 seconds drop from 200% FTP to 100% FTP before resuming a recovery at 50%? This should help with the 140 cadence that I cannot always keep up with.
Thanks,
Matt
The lights came on. Maintain a desired cadence and the ERG mode will adjust accordingly.