# ERG Issues - anyone else ever get this **URL:** \ **Category:** Equipment\ **Created:** [April 18, 2020, 9:00pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055 "2020-04-18T21:00:55Z")\ **Posts on this page:** 9\ **Page:** 3
**Author:** ![RONDAL](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/rondal/32/7721_2.png) [@RONDAL](https://www.trainerroad.com/forum/u/RONDAL)\ **Post date:** [April 23, 2020, 10:45pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/41 "2020-04-23T22:45:28Z")
yeah i tracked both today for michael, the drift is pretty substantial, goes from ~28% to 8-10% 45min in. Appreciate you and the team looking into this. ---
**Author:** ![enki42](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/enki42/32/68042_2.png) [@enki42](https://www.trainerroad.com/forum/u/enki42)\ **Post date:** [May 12, 2020, 1:53pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/42 "2020-05-12T13:53:30Z")
> [@Nate\_Pearson](#): > > What we can do is be more responsive and save offsets between the two power meters between rides. This is in internal testing now. > > It’s looking good and I’d like to get this out to a closed beta this week. Join this thread and we’ll start enabling the role for people as soon as it’s ready. Note: It will be mac/pc only at first. Anything happen with this? Thanks (I’m not sure If I’m hitting this bug or not cause if I am the difference isn’t that much) ---
**Author:** ![kevistraining](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/kevistraining/32/171237_2.png) [@kevistraining](https://www.trainerroad.com/forum/u/kevistraining)\ **Post date:** [May 12, 2020, 4:19pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/43 "2020-05-12T16:19:33Z")
I had this with my wheel on tacx vortex trainer - always drifted when it warmed up meaning power match struggled. New direct drive trainer fixed it though. ---
**Author:** ![enki42](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/enki42/32/68042_2.png) [@enki42](https://www.trainerroad.com/forum/u/enki42)\ **Post date:** [May 12, 2020, 5:34pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/44 "2020-05-12T17:34:31Z")
Thats not really an issue with the two devices having different power curves though. (my understanding of what he code change will do) Thats a warm up issue that wheel on trainers have. ---
**Author:** ![Dave1981uk](https://avatars.discourse-cdn.com/v4/letter/d/bb73d2/32.png) [@Dave1981uk](https://www.trainerroad.com/forum/u/Dave1981uk)\ **Post date:** [May 12, 2020, 6:56pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/45 "2020-05-12T18:56:53Z")
FYI I have the same model Kickr, and I get the same massive drift as @RONDAL reducing until the trainer is good and hot @25-30mins riding. Mines against Vector 3’s. I’d suspected the Kickr was the culprit rather than the peddles, this seems to confirm it. ---
**Author:** ![RONDAL](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/rondal/32/7721_2.png) [@RONDAL](https://www.trainerroad.com/forum/u/RONDAL)\ **Post date:** [May 12, 2020, 7:04pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/46 "2020-05-12T19:04:51Z")
> [@Dave1981uk](#): > > Mines against Vector 3’s. I’d suspected the Kickr was the culprit rather than the peddles, this seems to confirm it. My 4iiii is currently being tested by 4iiii to ensure its not them. I plan on updating this post once i have more definitive technical information. FWIW I did separate testing with a P2M PM and have had zero drift issues for the last 4 weeks while i have been having my other PM assessed, so i dont immediately agree with your conclusion. ---
**Author:** ![Dave1981uk](https://avatars.discourse-cdn.com/v4/letter/d/bb73d2/32.png) [@Dave1981uk](https://www.trainerroad.com/forum/u/Dave1981uk)\ **Post date:** [May 12, 2020, 7:32pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/47 "2020-05-12T19:32:48Z")
I’ll be interested to see what you find. I was basing my assumption on RPE. If I rely on the Kickr, then either the opening intervals are too easy, or if they feel right the later intervals are impossible. If I go resistance mode and peddles… then everything hurts. Which unfortunately seems correct. I posted some graphs about it as linked, but tbh just been riding rollers for the past few months so haven’t thought much about it. > [@Big vs Small Chainring - Same Power (ERG Mode Gearing)](https://www.trainerroad.com/forum/t/big-vs-small-chainring-same-power-erg-mode-gearing/6119/335): > > What I’ve noticed with the Wahoo Kickr and Vector 3 dual sided peddles. 10 min warm up then perform a spindown calibration, and calibrate the peddles. Today I was doing taylor -1, so VO2 intervals with the peddles on the garmin, trainerroad on the kickr. The warm up and first 2 intervals (of the first set) are on the big ring, from there swapped to the small ring as the power was 10% down, target 330, actual 300ish. Dropping to the small ring actually made things worse initially. What you do … ---
**Author:** ![Nate\_Pearson](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/nate_pearson/32/117463_2.png) [@Nate\_Pearson](https://www.trainerroad.com/forum/u/Nate_Pearson)\ **Post date:** [May 12, 2020, 9:19pm UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/48 "2020-05-12T21:19:13Z")
> [@enki42](#): > > Anything happen with this? Thanks (I’m not sure If I’m hitting this bug or not cause if I am the difference isn’t that much) Yes, daily builds and tests are happening. I’m actually trying to get a special build for my ride today but I don’t think it will happen. As soon as our internal users are happy (and so far there is an improvement but we’re still tweaking) we’ll start opening it up to people outside of the company. ---
**Author:** ![enki42](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/enki42/32/68042_2.png) [@enki42](https://www.trainerroad.com/forum/u/enki42)\ **Post date:** [May 13, 2020, 12:45am UTC](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055/49 "2020-05-13T00:45:51Z")
Thanks for the update. I know this is only a data set of four but is this the power matching bug you’re trying to fix? See the critical power curves on these two comparisons: > **[ZwiftPower - Login](https://zwiftpower.com/analysis.php?set_id=34154)** > > Zwift race results and statistics. > **[ZwiftPower - Login](https://zwiftpower.com/analysis.php?set_id=34157)** > > Zwift race results and statistics. > **[ZwiftPower - Login](https://zwiftpower.com/analysis.php?set_id=34160)** > > Zwift race results and statistics. > **[ZwiftPower - Login](https://zwiftpower.com/analysis.php?set_id=34161)** > > Zwift race results and statistics. Zwift is paired to my pioneer (both left and right) over ant+ and the other file is TR paired to a wheel off Kickr2018 over bluetooth and the power meter over Ant+ (with 34154 was only paired over bluetooth to the trainer) [Previous page](https://www.trainerroad.com/forum/t/erg-issues-anyone-else-ever-get-this/34055.md?page=2)