Did a workout yesterday and noticed a big difference in difficulty when going either uphill or downhill in ERG. My route included the Alpe and approaching on the flat I was holding 235 watts, all fine and good, then start the climb and the same 235 watts feel a lot easier, in fact the steeper the slope the easier it felt. On coming back down the same 235 watts feels much, much harder. ERG should make hills feel flat, right, but there is definitely a big difference in exertion needed for going either up or down, my heart rate figures confirm this. I am using a 2017 kickr for reference.
Hey Mike, can you send us support conversation and send us your log files for that ride?
Support Conversation: https://support.zwift.com/contact/contact-us-HJH8N4RNQ
How to find log files: https://support.zwift.com/en_us/how-do-i-find-my-log-files-(cycling)-SyTW0JZSX
We also have some troubleshooting ERG tips in this article: https://support.zwift.com/en_us/-how-to-use-erg-mode-in-workouts-rklSxCkbH7