Not life threatening 
whatās your setup? what PM youāre using?
Assioma duo. Seems Iām not the only one in this situation
@gpl have you been able to close down your lab (or to put it another way have Tacx come up with an answer)? There are lots of us out there who are seeing similar issues - in my case its a 5-10% difference between my Neo 2T and Stages power meter
Worth noting. Iāve recalibrated the assiomas in TR and it was much better.
I was doing it only on my garmin, maybe that was part of the issue.
@gpl, so itās good now for you? Any thoughts/ideas on what could be causing this? Seems weird that the difference isnāt linear as power increases. Something to do with less accuracy as virtual flywheel speed increases? Or maybe cadence?
I had much better results on one test where I did sprints at high cadences, as opposed to the below test rides which were ridden at normal cadences.
my neo one is usually 7-9 watts below my assiomas. the difference is such that i may never be a zwift champion in B grade lol
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7-9W makes total sense to me, drivetrain loss and all. Iād expect to see the same percentage difference at all power levels. What confuses me is the much greater discrepancy that I see in shorter duration hard efforts. My sprints are around 2x less accurate than longer efforts (if you trust the Assioma, which match my Rallys as well).
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Does this make power matching the best way to get reliable resistance from a smart trainer. I have duos and a Tacx 1 and Iāve noticed big discrepancies so Iāve just used power matching for the past year or so.
Power matching seems like the way to go for most people. Iām just trying to decide what to do for Zwift racing. I donāt want to feel like Iām cheating by cherry picking the higher power source, but I do want my numbers to be consistent inside and out for training reasons, and my other power sources (Assiomas, Rallys, and P2M and Sigeyi spiders) all match pretty closely with each other.
Hi All,
Long time listener, first time caller.
Iāve just recieved a new Neo 2T after my old faulty Neo was replaced.
The lag on ERG mode is soo different to my old Neo. It takes a good 10-15 seconds to lock into target power and even then it fluctuates much much more than my old Neo. Iāve got the latest firmware update and I use the new Neo in the same way as the old one; little ring, middle of cassette, smooth cadence going into the interval, no conflicting devices only my HRM and Neo connected to my iphone. I really liked the āriding into a wallā ERG mode of the old trainer. Thereās no way I could do something like 30/30ās in ERG on the new trainer, annoying as Iāll now fail the āsleeping baby testā with shifting gears next door to my daughters room.
Also my old Neo pretty closely matched my Power2Max PM, the new Neo 2T is consistently 4% lower than PM, no biggie as Iāve created a 4% offset in the P2M app and they now match. Iām doing this instead of using power match as Iām assuming using power match will only make the ERG lag greater?
Has anyone else had this problem, apologies if this has already been discussed, just point me to the discussion.
Thanks,
LC
Could you tell us more about your setup (what is connected to which device via which protocol)? Is TR using your PM or does it only see the NEO 2T?
My experience is the contrary btw, my NEO 2T is way more āinto the wallā (read: responsive) than my NEO OG was.
Hi,
Neo 2T to TR via bluetooth on iphone. With Bluetooth HRM also connected to iphone. No other devices. I tested the 2T against my bikes PM by pairing the bikes PM with my Wahoo Bolt. I did one session of short repeats and one steady ride, the new 2T was consistently 4% lower than the bikes PM, as I mentioned Iām OK with this as Iāve offset my bikes PM in itās app to match (slightly bitter pill lowering ones FTP by 4% but I can live with it).
Before I replaced my old Neo when I realised it was starting to fail, I was using power match and even with this ERG was still way more responsive than this new 2T. Even something like Spanish Needle would lock you into target power almost immediately.
Thereās no way I could use the ERG for any intervals less than two minutes with this lag.
If you have a public TR account setting, sharing a related workout could be helpful. Short of that, some pictures of the zoomed in intervals of interest is the next best.
Outside of that, it may be worth an email to support@trainerroad.com so they can dig into the hidden stuff we canāt access for review.
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These intervals are 15, 40, 70, 75 seconds.
The ramp in is far too long. Iām not sure itās a TR issue, likely a Neo 2T issue. Given my previous two Neoās have been super responsive with TR.
The lag is much much greater than my previous two Neoās they would take less than 3 seconds to ālock in.ā
I will give power match a try.
I donāt have one but Iām interested in the neo 2t, so I looked at the other posts about it.
Are you using big gears? Some users reported that the oscillation problem could be solved by using smaller gear. I would also expect the lag to be smaller with small gear.
I use 34T and middle of the cassette, the lag is more if I use the big ring but both are still much more than my previous Neoās.
The 2T is crazy fast with changes. This might be the one you got specifically or something else is going on. Hereās a 30/30 with powermatch on. The power spikes are at most 5 seconds into the interval. Most around 3-4s.
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Possible causeā¦ youāre ramping your cadence at the same time. Iāve noticed that if I anticipate the power change too much and spin up my cadence, it takes much longer for the Neo to bring up resistance. Power is a function of cadence, so spinning up right at the start of an interval messes up the trainerās ability to accurately gauge what power youāre putting down, so it takes longer. Try keeping you cadence steady through the interval start, and ramp up cadence after the resistance āhitsā.
You can see it in your cadence graph line. Especially that first interval.
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Itās just not the same as my previous Neoās, even with great cadence control going into the effort, the lag would be too great to ever be able to do 30/30ās, even 60ās would take too long to lock in. I had no trouble with 15/15ās on my previous Neo.