Power comparison with Vector 3 Pedals

Hi,

I got my 2T today and did my first ride using TrainerRoad. I used the 2T as the power source in Erg mode connected to TrainerRoad, with my Vector 3 pedals connected to my Edge 1030. There was a significant defference between the power readings of the two devices of between 15 and 20 watts; the Neo reading approx 245 and the Vectors closer to 260. A chart is attached showing hte two rides overlaid on one another.

Is there a problem, or is this normal? I don't know how the different readings are taken, but assume that they should be broadly similar across the range - the variation seems to great to be accounted for by devices at opposite ends of their tolderance ranges to me. Grateful for your thoughts?

https://analyze.dcrainm..aker.com/#/public/1095b96c-676d-43d7-6f98-40b0d3533806

Any advice would be gratefully accepted.

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0 Jone88 over 4 years ago

I have similar results on my power2max and 2t. About 5% off , whole range.

0 IceLed over 4 years ago

Yep, same here - Neo 2T vs Assioma Favero Duo... 4-5% off (Favero reads higher). I thought it was related to the fact that Favero (just like Vector) measures at the pedal and there is no efficiency loss through the drive train, where Neo 2T measures.

0 Jone88 over 4 years ago in reply to IceLed

I have readed older neo models reviews and they are much closer against pedal based and spider based powermeters.

0 IceLed over 4 years ago in reply to Jone88

Maybe it is just a matter of new firmware? The current one is already quite "old" in comparison of other releases for their other products.

0 7331748 over 4 years ago

This is a known issue and covered by GPLama on youtube. All we can hope for is a new firmware to fix the problems or at least get 2T in line with the original Neo which is way more accurate.

0 phaupt over 4 years ago

Same here, Neo 2T vs SRAM Red Quarq. About 2% to 5% off.

www.zwiftpower.com/analysis.php?set_id=9791

0 Tacx Faqx over 4 years ago in reply to 7331748

Oh yeah? What known issue? What is your source for this information?

Neo 2T is very comparable to the original Neo. I'm not sure what you're on about, but I think you are mistaken.

0 7331748 over 4 years ago in reply to Tacx Faqx

I'm sure you're familiar with Shane Miller (aka GPllama)
He's had his Neo for years and finds it to be an extremely accurate unit. He has tested a Neo 2 (also accurate) and a 2T (reading much lower and inconsistent at different flywheel speeds) as well. He also tested the Neo Bike and found it to be as accurate as the original Neo. 2T was the only issue.
He has a very repeatable test procedure that he applies to all power meters and trainers. His findings reflect what you'll find a lot of users also report on several riding forums. Also lines up with my experience as well.
He's also been to Tacx headquarters and discussed his findings with the team.

Unless there's a few dozen people with the issue and it's not such a wide range of units, it's a firmware issue that is in progress to be fixed.

0 Tacx Faqx over 4 years ago in reply to 7331748

I think you are 100% incorrect about Shane Miller's reporting. If you're talking about issues with 2T before it was even released, those issues were resolved with firmware version .31

Update your references. You don't know what you're talking about.

0 7331748 over 4 years ago in reply to Tacx Faqx

whoaaa buddy calm down. breathe. try not to have a heart attack. alright you calm?
now check out this post from shane where he's responding to my question only 21 days ago.
https://forum.trainerroad.com/t/tacx-neo-2t-smart-trainer/20447/27?u=gurk700

I have a Tacx Neo 2T. Believe me there's nothing more I want than to have an accurate unit I've spent $1400+tax on. I bought 2T knowing these issues because I believe in Tacx and their capability of fixing issues. Shane as he mentioned talked to Tacx about the issues. We all believe they're gonna get ironed out on a firmware.

Now that you have actual facts, maybe stop yelling at people on forums. Best of luck.