# New powermeter, unusually high power. Am I doing something wrong? **URL:** \ **Category:** Equipment\ **Tags:** power-meter\ **Created:** [October 26, 2020, 8:50pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354 "2020-10-26T20:50:40Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![jmdcovas](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jmdcovas/32/49212_2.png) [@jmdcovas](https://www.trainerroad.com/forum/u/jmdcovas)\ **Post date:** [October 26, 2020, 8:50pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/1 "2020-10-26T20:50:40Z")
Just got my new Favero Assioma Duo pedals. Just finished the installation, activation, calibration, etc. Then I tested it using TR (the Power Training Ridethrough workout), and recording the power numbers of my Tacx Flow smart trainer on my fenix 6. To my surprise, the Assioma power numbers are about 20-30W **HIGHER** then the trainers power numbers. The average power of the WO was 184W in the Assiomas, and 166W on the Tacx Flow Trainer. I tried checking the settings, if I had something badly configured, even changed the crank lenght to see if it had any impact, but no, it keeps reading much higher. Am I doing something wrong? ---
**Author:** ![d\_diston](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/d_diston/32/10140_2.png) [@d\_diston](https://www.trainerroad.com/forum/u/d_diston)\ **Post date:** [October 26, 2020, 9:04pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/2 "2020-10-26T21:04:37Z")
20-30W sounds totally plausible. Was the power relationship between the two linear? ---
**Author:** ![devolikewhoa83](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/devolikewhoa83/32/7757_2.png) [@devolikewhoa83](https://www.trainerroad.com/forum/u/devolikewhoa83)\ **Post date:** [October 26, 2020, 9:04pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/3 "2020-10-26T21:04:48Z")
they ought to be higher, based on drivetrain loss. ---
**Author:** ![jmdcovas](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jmdcovas/32/49212_2.png) [@jmdcovas](https://www.trainerroad.com/forum/u/jmdcovas)\ **Post date:** [October 26, 2020, 9:23pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/4 "2020-10-26T21:23:29Z")
> [@d\_diston](#): > > Was the power relationship between the two linear? Yes it was. > [@devolikewhoa83](#): > > they ought to be higher, based on drivetrain loss. That makes sense, but I’ve seen on the forum that usually the Tacx Vortex and Flow have higher numbers than the “dedicated” PM (sime say 10-20% higher). I find it very strange that I’m finding 20W higher power on the Assiomas. ---
**Author:** ![jfranci3](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jfranci3/32/12908_2.png) [@jfranci3](https://www.trainerroad.com/forum/u/jfranci3)\ **Post date:** [October 26, 2020, 10:19pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/5 "2020-10-26T22:19:46Z")
Thats pretty plausible with a wheel on trainer. Just believe the new number and move on with life. ---
**Author:** ![jmdcovas](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jmdcovas/32/49212_2.png) [@jmdcovas](https://www.trainerroad.com/forum/u/jmdcovas)\ **Post date:** [October 26, 2020, 10:25pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/6 "2020-10-26T22:25:02Z")
I’m not mentally ready to have my FTP go up by 20W just by changing powermeters 😬 I’ve been checking everything, and I think I did everything perfectly. Installed correctly, activated the pedals using the app, calibrated/zero offset, crank lenght set correctly (170 in my allez sport). Anyone has any experience like this going from a tacx flow to assiomas? ---
**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:** [October 26, 2020, 11:23pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/7 "2020-10-26T23:23:05Z")
Sounds plausible to me too. How careful are you calibrating the flow? 15min warm up every time? How well is your drivetrain running? 20w seems excessive for drivetrain loss but even if it was clean it would sap 5w or so. Then the flow is only claimed accurate to 5% so that’s another 10w. As long as your L/R balance numbers are good from the faveros I’d trust the numbers they give you. ---
**Author:** ![jmdcovas](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jmdcovas/32/49212_2.png) [@jmdcovas](https://www.trainerroad.com/forum/u/jmdcovas)\ **Post date:** [October 26, 2020, 11:37pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/8 "2020-10-26T23:37:01Z")
I usually calibrate the Flow right away, before the workout and without warm-up. Maybe that’s the issue. As for the drivetrain, I don’t ride outside much, so its pretty clean, but I guess I could try to clean it to check if there’s any difference due to the drivetrains. Thanks for the tips. I’m going to do a ramp test tomorrow, and I don’t know if I should record both power numbers. It will make me crazy compare the two 🤦‍♂️ ---
**Author:** ![tkent](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/tkent/32/29864_2.png) [@tkent](https://www.trainerroad.com/forum/u/tkent)\ **Post date:** [October 26, 2020, 11:46pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/9 "2020-10-26T23:46:22Z")
Same thing happened to me when I switched from Wahoo Kickr Snap to Favero Assiomas. 10/15% increase in power readings. My Assiomas agreed with a Computrainer, so I trust the readings. ---
**Author:** ![Stringwise](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/stringwise/32/8504_2.png) [@Stringwise](https://www.trainerroad.com/forum/u/Stringwise)\ **Post date:** [October 26, 2020, 11:46pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/10 "2020-10-26T23:46:38Z")
> [@jmdcovas](#): > > Am I doing something wrong? Yes. It’s a known law of the universe that you don’t question your power meter for reading too high. Ever. ---
**Author:** ![jmdcovas](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jmdcovas/32/49212_2.png) [@jmdcovas](https://www.trainerroad.com/forum/u/jmdcovas)\ **Post date:** [October 26, 2020, 11:50pm UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/11 "2020-10-26T23:50:09Z")
Okay then, seems like I have to trust them 🤷‍♂️ After 6 weeks of build and this new power meter, my new FTP is going to go through the roof 😅 ---
**Author:** ![bradchang](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/bradchang/32/140377_2.png) [@bradchang](https://www.trainerroad.com/forum/u/bradchang)\ **Post date:** [October 27, 2020, 3:06am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/12 "2020-10-27T03:06:48Z")
For Tacx Flow Trainer, not much surprising 🙂 > **[Tacx Flow Budget Smart Trainer In-Depth Review](https://www.dcrainmaker.com/2020/04/tacx-flow-budget-smart-trainer-in-depth-review.html)** > > The Tacx Flow Smart is not new. Though, it might be to a lot of people. It’s the least expensive true smart trainer on the market – at least by any of the major players (or even medium players that ---
**Author:** ![old\_but\_not\_dead\_yet](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/old_but_not_dead_yet/32/58519_2.png) [@old\_but\_not\_dead\_yet](https://www.trainerroad.com/forum/u/old_but_not_dead_yet)\ **Post date:** [October 27, 2020, 3:11am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/13 "2020-10-27T03:11:50Z")
But, but, but…all that matters is that your power meter is consistent, right? Who cares if is actually correct, that’s only something true nerds worry about. ---
**Author:** ![jmdcovas](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jmdcovas/32/49212_2.png) [@jmdcovas](https://www.trainerroad.com/forum/u/jmdcovas)\ **Post date:** [October 27, 2020, 7:10am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/14 "2020-10-27T07:10:33Z")
I guess I’m a nerd 🤓 ---
**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:** [October 27, 2020, 7:33am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/15 "2020-10-27T07:33:52Z")
I see no reason to doubt the faveros in your situation. The beauty of having the DUOs is that they are essentially two independant power meters - if one was wrong you would know about it in the balance data. ---
**Author:** ![blister202](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/blister202/32/36023_2.png) [@blister202](https://www.trainerroad.com/forum/u/blister202)\ **Post date:** [October 27, 2020, 7:38am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/16 "2020-10-27T07:38:57Z")
Hi, I have the same combination (I think? Tacx Flow Smart). At the beginning, when the trainer and everything is cold, it reads around 25W lower than the Assioma Duo. But after the warmup and into the first longer TR interval, they match quite good (2W!). Either you just rely on the Assioma, or you always calibrate the Tacx Flow Smart after let’s say 15min. If the Tacx Flow Smart has been calibrated “hot” once, it keeps the good calibration in “hot” conditions. But at every start of a workout it will have too little resistance. I thing spending your money on the Assiomas and a cheaper Trainer is smarter than going the Direct Drive Route for the same or even more money. ---
**Author:** ![JoeriN](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/joerin/32/132957_2.png) [@JoeriN](https://www.trainerroad.com/forum/u/JoeriN)\ **Post date:** [October 27, 2020, 7:49am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/17 "2020-10-27T07:49:22Z")
I’ve noticed the same with my Flow Smart. Once warmed up, it’s within a few Watts of what my Assioma Duos are indicating. ---
**Author:** ![jmdcovas](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/jmdcovas/32/49212_2.png) [@jmdcovas](https://www.trainerroad.com/forum/u/jmdcovas)\ **Post date:** [October 27, 2020, 8:40am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/18 "2020-10-27T08:40:59Z")
Yeah, today I did a ramp test, and after it warmed up, the results matched pretty much what I was expecting. I didn’t record them simultainusly, but the perceived exertion matched pretty much what I was used to with the Flow power numbers. I guess the difference is only at the beginning when the Flow is “cold”. I’m just happy the Assiomas are reading correctly, I thought I might I done something wrong with the setup. Thanks everyone 👍 ---
**Author:** ![old\_but\_not\_dead\_yet](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/old_but_not_dead_yet/32/58519_2.png) [@old\_but\_not\_dead\_yet](https://www.trainerroad.com/forum/u/old_but_not_dead_yet)\ **Post date:** [October 27, 2020, 11:07am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/19 "2020-10-27T11:07:14Z")
As you should be. ---
**Author:** ![old\_but\_not\_dead\_yet](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/old_but_not_dead_yet/32/58519_2.png) [@old\_but\_not\_dead\_yet](https://www.trainerroad.com/forum/u/old_but_not_dead_yet)\ **Post date:** [October 27, 2020, 11:10am UTC](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354/20 "2020-10-27T11:10:27Z")
That’s interesting, because it is usually the other way 'round, with heat causing resistance to fade. Maybe they try to compensate electronically and have overshot the mark? [Next page](https://www.trainerroad.com/forum/t/new-powermeter-unusually-high-power-am-i-doing-something-wrong/45354.md?page=2)