Originally Posted by
sdmc530
your correct they are very hit and miss, that its why if you care about this metric you have to upload you data so that software can adjust it to correct. IE: Garmin Connect has a altimeter correction built in when you upload it will fix the "weird" readings. Does a nice job of it. Not perfect but still.
I don't have any experience with the Wahoo but I would bet they do the same thing when uploading it to their software.
The problem comes when you try to use multiple on-line data collectors, Connect, Strava, RWGPS and they all show different things. Then you wonder who’s correct and what total elevation gain/loss loss is real. If you stick with just one and never look at the others........is it still real ? Lots and lots of posts on assorted forums about this, is why I never pay attention to elevation.