Resistance problems (Tacx Neo 2)


Within the last 20 days I have started to experience the resistance problem on my Taxc Neo 2 home trainer.

When I cycle up hills I feel that the resistance comes and goes. It’s as if the resistance disappears for 1/8 second (every second) which makes it suddenly very easy to pedal. It makes cycling extremely uneven.

As I said, it’s something completely new that I have never experienced before on my trainer.

I use Tacx Neo 2, Blietooth, Zwift, latest firmwire, Macbook (latest OS).

Happens in Meetup and races.

Help is warmly welcomed.

for starters if you haven’t changed anything take it for a free ride and see if it happens there too - if it does then I would think it is the trainer with the problem

If it is only on hills link below might be one reason. Have you changed your gearing recently or hill climb pedalling style/cadence?

Hi both. Thank you very much.

The odd thing is that I havn’t changed anything. No gear change, update etc.

It just occurred 20 days ago and only on my trainer, when I ride uphill.

I have read about the “Virtual tire slip”, but it just seems odd that it suddenly occurred. It went from being the “perfect trainer” to near useless in a day.

Did you change your weight…heavier riders have more Tire Slip.

I have this on my Neo2T since Day 1 at 80kg.

I noticed that if i lower to around 80% Gradient simulation the slip is gone.
In races i don’t use more that 30% cause shifting gears will drop you places.

Hi Dejan. Thank you.

No, I did not change my weight or gradient simulation. But perhaps I should try to lower the gradient simulation and see if that fixes the problem. Just weird that it just occurred suddenly after using the trainer for years.

If it helps i do have the same issue. Only that is happening when I’m holding on the same rpm i loose the resistance. In order to keep the power i have to increase the rpm and so on. I struggle with this for the last month and cannot find the reason. It is the Tacx2 or Zwift software. Needless to say that is asking me to update every few days. I start getting tired of it going on like that. If is anybody else and found a solution would like to hear it pls.

I had something similar today, where going on the flat and descents seemed to provide very little resistance, even in my faster gears (I could spin out in the smallest cog in a sprint, and there was no effort to bring it up to speed like there was usually) Uphill did provide more resistance, but as soon as the road flattened I’d be unable to put any power through the trainer. Also occurred when connecting to my phone.

Seemed to be all ok after pulling the power on the Neo2 for ~10 secs and then plugging it back in (so I’d get an increase in resistance/power when shifting to faster gears on the flat, and trying to sprint actually took some effort to turn the pedals over) - hopefully that might solve the issue for you.

But that shouldn’t happen as far as i know. If you do a training session will happen exactly like happened to me.
As well as if you racing you loosing the power after few secs if you are on the same rpm. And the software will read that you slow down as you don’t have power.

If you’ve tried to turn off / turn the trainer back on again, and you’re still having issues; I think you might need to get in touch directly with Garmin support, hopefully they can diagnose and resolve the issues.

Hi Florin,
I would check the issue with another cycling app. You could try indieVelo. It’s in beta right now and free of charge. Works great - never had an issue with it. If it remains you should contact Tacx support.