# Calibration doesn't work with Zwift Hub (TR PC) **URL:** \ **Category:** TrainerRoad Software\ **Tags:** bug\ **Created:** [October 24, 2022, 3:43pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086 "2022-10-24T15:43:40Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![ThomasE](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/thomase/32/115206_2.png) [@ThomasE](https://www.trainerroad.com/forum/u/ThomasE)\ **Post date:** [October 24, 2022, 3:43pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/1 "2022-10-24T15:43:41Z")
Hi there, I encounter the following issue: when I want to do a spin down calibration on my Zwift Hub, the TR desktop client tells me to “Speed up until you reach **0.0** KPH”. Well, I am pretty successful in doing so but obviously that won’t do the trick. ![image](https://global.discourse-cdn.com/trainerroad/original/3X/2/e/2e76ef96ba2c2889e5b8a3b98718c3211a26ca45.png) So then I tried to pedal to a normal calibration speed. The speed is being read and the app even tells me to stop pedaling but the calibration never succeeds. I use a Zwift Hub smart trainer so maybe it doesn’t work because you need some device-specific update first - but maybe not and somebody around here can point me in the direction of a fix? Thanks for any help! ---
**Author:** ![IvyAudrain](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/ivyaudrain/32/47471_2.png) [@IvyAudrain](https://www.trainerroad.com/forum/u/IvyAudrain)\ **Post date:** [October 24, 2022, 4:34pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/2 "2022-10-24T16:34:18Z")
Hey! Looking into this now for you. 👍 ---
**Author:** ![tfilteau](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/tfilteau/32/7746_2.png) [@tfilteau](https://www.trainerroad.com/forum/u/tfilteau)\ **Post date:** [October 24, 2022, 4:40pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/3 "2022-10-24T16:40:07Z")
Does it work when you are doing the workouts? Also I don’t know if this changes things but could you just do the calibration using zwift’s app then do the workout? ---
**Author:** ![IvyAudrain](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/ivyaudrain/32/47471_2.png) [@IvyAudrain](https://www.trainerroad.com/forum/u/IvyAudrain)\ **Post date:** [October 24, 2022, 7:16pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/4 "2022-10-24T19:16:57Z")
We don’t have a Hub in-house to test right now, but we can see if we can get our hands on one to make sure we’re fully compatible and can better work out future troubleshooting steps. In the meantime, there a couple things you can try: - Try spinning up to \>39KPH before letting the trainer “spin down” - Try the TrainerRoad mobile app for the calibration instead of your standard desktop method you’re currently using. - Calibrate on a head unit (Garmin or Wahoo). The calibration is stored on the device itself and will carry over into TrainerRoad. Let me know if any of these help! ---
**Author:** ![ArHu74](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/arhu74/32/177458_2.png) [@ArHu74](https://www.trainerroad.com/forum/u/ArHu74)\ **Post date:** [October 24, 2022, 7:29pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/5 "2022-10-24T19:29:20Z")
Change from erg to resistance mode ---
**Author:** ![ThomasE](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/thomase/32/115206_2.png) [@ThomasE](https://www.trainerroad.com/forum/u/ThomasE)\ **Post date:** [October 31, 2022, 5:11pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/6 "2022-10-31T17:11:42Z")
Thanks for looking into this, @IvyAudrain! I’ll try your suggestions once I’m back home 🙂 Just one follow-up question: when you talk about calibration data being stored on the device, are you talking about the head unit or the smart trainer? I assume the latter. If so, does the same apply when calibrating with another Software product instead of a head unit, i.e. could I try what @tfilteau suggests? ---
**Author:** ![mcneese.chad](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/mcneese.chad/32/15056_2.png) [@mcneese.chad](https://www.trainerroad.com/forum/u/mcneese.chad)\ **Post date:** [October 31, 2022, 5:14pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/7 "2022-10-31T17:14:46Z")
> [@ThomasE](#): > > smart trainer? I assume the latter. Yup, the zero offset / calibration is always stored in the actual power device itself, the trainer or power meter in use. ---
**Author:** ![dougaldoughnut](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/dougaldoughnut/32/116898_2.png) [@dougaldoughnut](https://www.trainerroad.com/forum/u/dougaldoughnut)\ **Post date:** [November 23, 2022, 6:00am UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/8 "2022-11-23T06:00:59Z")
Any update on this ? ---
**Author:** ![IvyAudrain](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/ivyaudrain/32/47471_2.png) [@IvyAudrain](https://www.trainerroad.com/forum/u/IvyAudrain)\ **Post date:** [November 23, 2022, 2:47pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/9 "2022-11-23T14:47:33Z")
Hey! We do not have an in-house zwift hub trainer for testing currently. There is an update on calibration insight though, I did see via [DC Rainmaker](https://www.dcrainmaker.com/2022/10/zwift-hub-smart-trainer-in-depth-review-the-best-bang-for-your-buck.html) that: _“In my testing, as well as what Zwift themselves say – they recommend doing a **spin-down calibration at about the 10-minute marker**.”_ Are you also experiencing calibration issues? Let me know and we can try to help! ---
**Author:** ![veryfishy](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/veryfishy/32/118030_2.png) [@veryfishy](https://www.trainerroad.com/forum/u/veryfishy)\ **Post date:** [January 15, 2023, 7:53pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/10 "2023-01-15T19:53:21Z")
I’m relatively new to the platform but have also been unable to calibrate using a Zwift Hub trainer. Behavior is similar to the original poster, asking me to spindown from 0.0. I just wanted to chime in that this still appears to be an issue with the desktop application for Zwift Hub users. ---
**Author:** ![veryfishy](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/veryfishy/32/118030_2.png) [@veryfishy](https://www.trainerroad.com/forum/u/veryfishy)\ **Post date:** [January 15, 2023, 9:47pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/12 "2023-01-15T21:47:23Z")
Hi alpineclimber. Thanks for your recommendation. My comment was in reference to the desktop application. I haven’t attempted to calibrate using the mobile application and I don’t typically have a phone nearby when using TrainerRoad. I will try to calibrate using the phone application as you’ve recommended and will report back, but TrainerRoad recommends calibration before every ride. I just wanted to say that I was still experiencing the issue that the original poster spoke of. My Zwift Hub is up-to-date in regards to firmware. ---
**Author:** ![Alansd1980](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/alansd1980/32/12908_2.png) [@Alansd1980](https://www.trainerroad.com/forum/u/Alansd1980)\ **Post date:** [January 15, 2023, 10:06pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/13 "2023-01-15T22:06:52Z")
this is the same issue I have been having on a Tacx vortex so don’t think its device specific ---
**Author:** ![ThomasE](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/thomase/32/115206_2.png) [@ThomasE](https://www.trainerroad.com/forum/u/ThomasE)\ **Post date:** [January 18, 2023, 8:28am UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/14 "2023-01-18T08:28:16Z")
As OP just a bit more detail on what currently works and doesn’t work for me - all this refers to the TR Desktop application: I connected my Hub via both Bluetooth and Ant+ When I click on calibrate on the Bluetooth device, it tells me to spin up to 0.0 km/h. However, when I spin to 39 km/h I end up getting a “calibration successful” message. I do, however, get it before the wheel stops completely which makes me wonder whether or not this can be accurate. When I click on calibrate on the Ant+ device, it tells me to spin it up to 32 km/h but even when I do the calibration never appears to be complete - I simply don’t get any feedback from the TR app. ---
**Author:** ![mcneese.chad](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/mcneese.chad/32/15056_2.png) [@mcneese.chad](https://www.trainerroad.com/forum/u/mcneese.chad)\ **Post date:** [January 18, 2023, 12:30pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/15 "2023-01-18T12:30:17Z")
Anyone email TR support directly about this issue? ---
**Author:** ![ThomasE](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/thomase/32/115206_2.png) [@ThomasE](https://www.trainerroad.com/forum/u/ThomasE)\ **Post date:** [January 18, 2023, 2:04pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/16 "2023-01-18T14:04:55Z")
Not me. For me, it’s okay as is because eventually the calibration works (hopefully accurately), even though the UX to get there is broken. ---
**Author:** ![SarahLaverty](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/sarahlaverty/32/99468_2.png) [@SarahLaverty](https://www.trainerroad.com/forum/u/SarahLaverty)\ **Post date:** [January 18, 2023, 3:16pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/17 "2023-01-18T15:16:13Z")
Thanks for that extra info @ThomasE 👍 . I spoke to the team about this and we are going to check if it’s possible to get a Zwift Hub in-house to test this out. We will keep you posted about this. > [@Dougal.Doughnut](#): > > I have a zwift hub. Using the TR app on my phone i can calibrate it easily enough At the moment, I think it would be best to calibrate the trainer in the mobile app, seeing as we are seeing athletes able to do this successfully. @Alansd1980, i’m going to look into your issue separately, and circle back. ---
**Author:** ![SarahLaverty](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/sarahlaverty/32/99468_2.png) [@SarahLaverty](https://www.trainerroad.com/forum/u/SarahLaverty)\ **Post date:** [January 18, 2023, 3:31pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/18 "2023-01-18T15:31:43Z")
Hey @Alansd1980, I see that you have both a Mac device and iOS device. Do you have the calibration issue on both devices? Just to clarify, when you calibrate the trainer in the TrainerRoad app, are you seeing the screen that @ThomasE shared (see below)? ![image](https://global.discourse-cdn.com/trainerroad/original/3X/2/e/2e76ef96ba2c2889e5b8a3b98718c3211a26ca45.png) Are you able to calibrate the trainer in the Tacx Utility app? The calibration is internal to the trainer so if you calibrate it on the Tacx Utility app, it will carry over to TrainerRoad. Thanks in advance if you can answer those questions; that will help point me in the right direction 😃. ---
**Author:** ![Alansd1980](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/alansd1980/32/12908_2.png) [@Alansd1980](https://www.trainerroad.com/forum/u/Alansd1980)\ **Post date:** [January 18, 2023, 9:27pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/19 "2023-01-18T21:27:12Z")
@SarahLaverty I just tried connecting it to the Mac and calibrated which worked, I then connected to he iOS device and it worked. Thanks for the prompt! ---
**Author:** ![ZackeryWeimer](https://sea2.discourse-cdn.com/trainerroad/forum/user_avatar/www.trainerroad.com/zackeryweimer/32/118962_2.png) [@ZackeryWeimer](https://www.trainerroad.com/forum/u/ZackeryWeimer)\ **Post date:** [January 30, 2023, 10:06pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/20 "2023-01-30T22:06:23Z")
Hey there, We’ve been doing some digging on this and may have found a potential fix! Open the TR app and go to Settings. Under “General,” you’ll see a setting for “Wheel Circumference.” Please make sure this value is _not_ set to 0. For reference, 2096 is typically the default value. Go ahead and check that out and let us know if it helps! ---
**Author:** ![Deadjeremy](https://avatars.discourse-cdn.com/v4/letter/d/cab0a1/32.png) [@Deadjeremy](https://www.trainerroad.com/forum/u/Deadjeremy)\ **Post date:** [February 8, 2023, 6:26pm UTC](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086/21 "2023-02-08T18:26:27Z")
Hi @ZackeryWeimer I’m having a similar problem on a new Zwift hub. I’ve tried the above but it doesn’t complete the calibration after the spindown (for info it also advises you to start the spindown as soon as you meet the required speed whereas my old trainer wanted me to maintain that speed or above for about 20 seconds) [Next page](https://www.trainerroad.com/forum/t/calibration-doesnt-work-with-zwift-hub-tr-pc/77086.md?page=2)