Wattbike Atom Gear Shift Problem

This is a new very recent bug. Either brought about by a Zwift update or an iOS update.

When riding in non-ERG mode (for example, just ride), the gear shifter doesn’t seem to work. It shows Gear 4 and then when you change it up to 5, it shows Gear 5 for about 2 seconds and then shows Gear 4 again. As you continue to go up the gears, it toggles between say gear 12 and gear 4. Same thing if you are below gear 4. As you go down from gear 4 it shows gear 2 for a small amount of time and then shows gear 4 again.

This is a bug on the two identical Wattbike Atoms I have.

There was an intermittent problem with the ERG mode but that seems to have been fixed by rebooting the iPad.

Zwift on iPad v 1.0.35413
iOS: 10.14.4
Wattbike Firmware: 1.01.83

There was an update just released for Zwift that has some important bug fixes in it. You can download the latest update on the App Store. If updating doesn’t solve the problem, try these steps below when going to ride:

  1. Sign onto Zwift and go through to the Ride Screen; the gears should be jumping when shifting.
  2. Turn the Wattbike off at the red switch for around 15 seconds.
  3. Make sure It shows that it’s disconnected on the top right, goes grey and everything blank.
  4. Turn the Wattbike back on and see if the gears are still jumping.


Thank you very much for the swift and informative reply. I downloaded the updated app from the app store and tried it out. Unfortunately the gear jumping issue is still there.

However, I went through the procedure of turning off the Wattbike during a ride…waiting 15 seconds and then turning it back on and the gear jumping problem was fixed.

I’ll use this work around when required but is there a permanent fix in the works?


I can confirm this exact same issue on Zwift using MacOS 10.14.4 and Wattbike Atom on latest and and even BETA firmware 6.00.25 [BETA].

This issue started since the last Zwift update.

I should also have confirmed that this is an issue with both the stable Wattbike firmware and the Beta firmware. The only other information I can give on this is that it is always an issue when you end an ERG mode workout and move out of ERG mode. Switching Wattbike off and on fixes this issue.

Strangely, this also happened on the Bologna TT challenge. Prior to the TT Challenge, I cycled round New York with the gear issue, switched the Wattbike off and on and the problem was fixed. Then I was moved to the TT holding point before the start and as soon as the race started, the gear problem reappeared.

As I said in the previous reply, the work around does solve the problem but it is somewhat irritating to have to get off the Wattbike, turn it off, wait 15 seconds, turn it on again and then start pedaling in the middle of a race…

I get the problem every time I start Zwift - ERG or not. Have raised with the support team, but response has been limited now we are past turning it off and on again.

This is a Zwift bug related to the recent updates and not Wattbike firmware. Bit of a shame as both have been rock solid for a while now.

Another problem has surfaced. Zwift is losing cadence information from the Wattbike intermittently. This happens in both ERG and non-ERG mode. In ERG mode this obviously causes a big problem because the Wattbike starts to ramp up the resistance. After about 2 or 3 seconds, cadence information returns. In non-ERG mode the gear shift indicator changes to Gear 6 when the cadence information returns.

Occasionally the gear indicator shows 50 (!!) for a second and then gear shifting is disabled for a few seconds.

Intermittent faults like this are very hard to track down. However, when I exited and shut down the companion app, the cadence issue didn’t reappear for the rest of the work out.

nb: this problem continued despite resetting the Wattbike as instructed above.

More sleuthing has discovered the following

  1. The issue with losing cadence information only appears when the Companion app is running. IF one doesn’t run the companion app there is no problem.
  2. The gear shift issue is still there in Zwift with the watt bike. To be clear, it is a display issue. When changing gears, the Wattbike gears do change but the display initially displays the selected gear for maybe 1 second and then displays “Gear 4”. Very occasionally, even without changing gear, the gear display flicks to the chosen gear and then flicks back to Gear 4.

Has there been any progress on this?

Hi, I am having exactly the same gear problem using a Wattbike atom and the latest Zwift app on iOS. I also find the app occasionally cycles me down to Gear 1 randomly.


Same thing here with h gear display showing the gear you are in then 4.

Hey @Zwift, any response on this? It’s been a month but no fix and not even an acknowledgement of the problem…

I flagged this issue up with our team. We have a Wattbike in transit to Zwift HQ for more testing. Once we find more information or have a solution, we’ll reach back out and let you know.

Ride On!
Mike M.
Zwift Member Experience Lead

That’s great Mike. Thanks for letting us know.

1 Like

Just received my Wattbike Atom today. Can’t get the gears to change. I’m thinking maybe it’s because I’ve tried to use first of all with Zwift. Stuck in 4th. Even when I’m not using Zwift it’s still not changing gear! Help please

Hey Paul,

I would recommend contacting Wattbike to see why your bike is stuck in 4th gear outside of Zwift. We haven’t quite figured out if the gear issue is from Zwift or from Wattbike. From your comment, it seems like it could be a Wattbike issue.

We’re getting ours (Atom) in soon, so I would recommend contacting their support to see if they can help you outside of Zwift.

I managed to resolve the issue by uninstalling Wattbike on my device and making sure it wasn’t connected. Still annoying to have to do that each time I want to switch connection.

New issues is the gears dropping down to 1 and then not changing. This happened 3 times on a half hour session. It’s intermittent and I’m not sure if it’s related to Zwift or Wattbike. Thanks

Have the same issues with Atom and Zwift. The gear changes appear to have been a bit of an issue for Wattbike and various updates have improved but not solved the problem. The key issue (my pet theory!) appears to be that the Atom automatically shifts gears unless you maintain for cycling within a fairly narrow band of cadence and power. So - again this is amateur speculation! - you hit a ramp and decide to mash it out…your cadence drops and the Atom reacts by dropping the resistance, rider starts spinning out cue frantic pressing of shifter to try and get things back on track. You would then have multiple messages going back and forth between Zwift and Atom about what gear you are in and things get messy.

The solution would appear to be for Atom to just switch off the automatic resistance adjustment and maintain the resistance come what may. However I assume that the feature protects the whole mechanism.

Overall my sense is that the Wattbike is an Erg based company (Pro and Atom). The Atom therefore retains the core DNA and still has a number of wrinkles to work out. Wattbike do not seem to be too keen at this time to do this and have even written a support piece on how to ride in Zwift…stable cadence and anticipating gradient changes…this somewhat defeats the “ultimate” tag that Wattbike applies.

Very frustrated as its a really well put together machine that they do not appear to have tested with ordinary humans aka variable power and cadence monkeys. They have had a while to sort this an a load of feedback and nothing has been forthcoming and questions to support seem to get stuck.

I think its a Wattbike issue and the automatic resistance changes are my bet for the culprit.

Thanks for the input on that. I have had the bike a week and not really been able to use it for various reasons. As you say it’s obviously well built but in my short experience very buggy. Your thoughts on this are a bit of a worry to me.

I’ve had Issues with gears and connectivity. Very frustrating. Their support have been good and they are sending an engineer out to look at the issues but it’s a brand new bike that one would have thought it could have been tested before dispatch. I’ve started an FTP test on three occasion only to have all gears fail on me less than a 5 mins in.

I’ve bought it to use with Zwift and if I can’t get it functioning as it should it’s going back which would be a real shame. The more I look into it the more people I see saying they are having the same issues. I don’t want to be stuck with a really expensive bike I can’t use.

Hopefully they can fix as it would be really nice set up.

I will keep you posted.

Hi Paul

I am trying to get some sense out the of Wattbike team on this.

Gear connectivity is a real issue but I think solvable. You need to make sure that all other apps are properly closed down when using the bike. Once it has connected to one app then connectivity to say, Zwift, gets very flaky.

Do not know if you have tried shutting down all apps, power down the Atom and then start each session from fresh but this seemed to cure connectivity for me but the 4th gear issue and the resistance slips are still a major deal breaker.

At the moment I do not think that it is sustainably usable with Zwift: the combination of gear lag, cadence and power sensitivity and the gear display glitch means that getting a coherent ride is not possible.

I am about one email away from returning the machine which I am properly gutted about. Rode a mates Tacx Neo 2 at the weekend and it was superb - but not quite the set up and leave that the Atom offers and some of the functionality not half as slick as the Wattbike but think that might be the way to go - its that or wait for the Tacx Smart Bike which is gasp makingly expensive and not out yet.

I have asked Wattbike to light a candle at the end of the tunnel and if they do I will probably stick with it but I have a feeling that there is a hardware block here and that fixing it is going to cost them a lot of money and they are keeping their heads in the sand for now.

I James,

Yes I have gone through the process of shutting down all apps and power and that did resolve one issues of the gear being stuck in 4th. Unfortunately another issue came along as soon as that was resolved.

It’s a real shame but given what you have just said I don’t wan’t to be stuck with a bike that I can’t use! It’s seems like there are some I.T issues that need sorting out and that couldn’t take a little while.

If I new for sure it would be fixed soon I would keep hold of it but I think you have made my mind up. Real shame.

I will check out the Tacx Neo2. Thanks for your help. : )