Tacx neo 2t fw. 0.32 vs. power2max power accuracy

Have you tested that 0.34 fw power accuracy in your powermeter in erg mode?

Tested yesterday, no change against previous.

The linearity improvement for the 2T came with the 0.0.31 update, 0.0.34 only fixed the phantom watts issue of the 2T

This is from today workout, I calibrate my power meter before start, after a while I have stopped and rise my saddle 2 mm

So it almost match perfectly

After stop, second and third interval , maybe because of the auto-calibration or saddle  raised, i had this discrepancy 

Hello all,

I've just bought a new Neo 2T and am having similar issues with low power readings. On threshhold range efforts it's more than 4% lower than my P2M NG (e.g. 252w average over 23 mins as opposed to 263w).

I actually have two P2M NGs and two Powertap G3 hubs, all of which are pretty close even accounting for drive train losses, so the Neo 2T is the outlier.

It doesn't seem acceptable that a device sold as being 1% accurate is reading 4 - 5% lower. I am currently using a very clean, relatively unworn drivetrain with squirt wax-based lube, so can't believe that drivetrain losses are accounting for 11w difference.

Do I have a faulty unit or all they all faulty? If the latter, when will this be sorted with a firmware update? (surely quite simple to do if all 2Ts are reading low by a similar offset?).

I really like the ride feel of the 2T and would like to be able to keep it. Although I can pair to the P2M for power in Zwift etc., I feel that having spent this much on a device that has a claim of 1% accuracy I should be getting something at least approximating that.. I'm also worried that if the rules for amateur Zwift racing ever change to only allow power from direct drive trainers in certain races I will be at a significant disadvantage (e.g. my girlfriend's Elite Drivo II actually reads 1 - 2% above my P2M, so about 6% different from my Neo 2T!).

What I dont understand, I sow that Neo2T is recomanded as device to be used in Zwift races, and how pro and other zwifters accept this difference?

Is should be gold standard

For example I had zwift C cat race and at the end I had 295 w with Neo2t and 305 w with Pw2max, maybe doesnt seems much ,but it is

If you search a little you will find that on a new Dura Ace chain you can have a loss of 4-7 w. So if you consider this and that your PM measures pedal power and Neo 2T at the other end of the chain, then you can understand the differences.

I had the same problem and I preferred to use Assioma and the trainer to consider the power of the pedals. And every training program I use is calibrated with Assioma. Easy fix if you have a PM!

No firmware update can take into account the wear of the chain and other parts between your pedal and the trainer. You can also search YouTube for how to lose 30w from driveterain...