I think one the things dcrainmaker and gplama mentioned in their reviews is that the victory is applying it’s own power smoothing directly on the trainer when on erg mode which which currently can not be turned off.
This is actually exactly what happens on most trainers/people. When the interval starts, most people overcompensate a chunk as they fall behind in the effort in the first 1-2secs. Power meters do a great job at recording that, since most trainers are doing estimated power (though very accurate estimations).
One of the tests I do, is exactly this in 30x30’s, to see how good each trainer controls it. But, as I often note in my tests, how tired my legs are, and I usually pick the ‘best’ ones to judge, since a core component of that test is how good I do at it. If I’m not paying attention and an interval swoops in and whack me, it would make it look like the trainer overcommited, when it reality it was me. Usage of a left-only power meter can make this effect even worse, since the multiplier offset kicks in.
However ultimately, with the JetBlack Victory, like a few other models, it doesn’t have an option to disable ERG-mode smoothing, and thus, will basically just report the value it’s supposed to be (to a certain extent).
I can understand it likely being the case on short intervals for the first few seconds, but in this case it’s consistently around 45 seconds under, and then the next 75 seconds significantly closer to the target / what JBV was showing as the output (2 minute intervals).
They were very comfortable power outputs for me too, nothing I needed to push myself for / adjust to.
Ahh, I thought you were saying the interval duration was 45s, and thus, looked like it spiked initially.
Out of curiosity, what gearing (roughly) are you using? In terms of small/big ring in front, and roughly easiest or hardest in back?
I think it’s 30T front (mid), 14T or 15T rear (4 up).
New trainer arriving tomorrow. Really hope it’s better than the first one was.
Not opened it yet, but this isn’t exactly encouraging (especially given they’re known to be sensitive to rough shipping).
Just a heads up that the Victory wasn’t compatible with my 2021 Giant TCR Disc (specifically the Advanced 1 model). The narrow part of the non-drive-side thru axle adapter was too short and this resulted in the thicker part of the adapter pushing against my chainstay (knocking off some paint and scratching the frame before I realized what was going on).
It’s possible that something is weird with my bike frame, but I’m posting because this could also be a general compatibility problem – I see now that the Jetblack adapter is similar to the original Kickr Core adapter before it was updated (in 2020 or 2021?) to address known frame incompatibilities (https://support.wahoofitness.com/hc/en-us/articles/360018850859-Updated-KICKR-CORE-thru-axle-adapter-installation). The updated Kickr adapter features a much longer narrow section.
Hopefully this is just a one-off thing with my bike, but please make sure you don’t have this problem before fully tightening a 2021-2023 TCR onto a Victory.
Been a bit sick this last week so haven’t trained much. The one session I did do on the replacement trainer showed new issues that the old one didn’t have (yay!).
Problems with the Zwift hub making an odd noise / moving out of position, and also (worse), the trainer no longer seems to be detecting my cadence properly, halving or more on a regular basis.
Having more issues with my Victory. When riding along in Zwift, I get sudden resistance changes. Like I’m cruising along at 200W and then it suddenly get harder for a few seconds, then really easy, then settles back. I dual recorded with my Assiomas and noticed this:
I’m getting cadence spikes, but they’re not real. They are cadence glitches. And I think that the cadence spikes are causing a sudden change in the resistance. Due to the way the trainer is calculating power using cadence, it’s messing with the target power. And it happens very frequently. Anybody else notice similar problems?
I’ve noticed multiple issues with mine. Feels like it’s hunting for resistance some times, other times it feels like pedaling through potato salad, reported power is all over the place. Hopefully they fix it with future software updates. Hardware seems solid and build quality is very good.
Sigh - I think that has been asked before, but are there people for whom the “Victory” is flawless? I’m considering canceling my preorder because of this thread. Also, I’m not really in “need” for a new/second trainer, but for the price I’d thought I’d take a look. But I certainly don’t want additional hassle.
I haven’t had any issues with mine, I don’t have any other power meter to compare it too, but resistance changes are working fine. No drop outs or anything, I am solely using trainer road and not zwift.