Tell me about it. What I’ve been doing for the accuracy part is load up Zwift with the trainer (and hope it connects). Then I’ll use my Garmin connected to my pedals. I’ll load up the workout on Zwift and when I get to the intervals, I’ll just adjust the intensity on Zwift so that my Assiomas are hitting the targets. I use the Garmin file as the main workout file for TR and TP analysis.
I sent an email to JB with my problems. I still can’t get wifi connected which they said would be a firmware update but I haven’t received it. I really want to like this trainer but it’s had more issues than any other trainer I’ve owned.
There’s a solution for this which might help. It involves deleting your saved devices from your zwift folders. Resetting Your Game Preferences
This solved my connectivity issues for the zwift click, for example.
Replacement unit now being arranged. Hopefully wont be long, though at least I’m still able to use mine (not had any dropouts etc, just the vibration).
I know people have said that you can’t really compare a left only crank PM to the power reading on the trainer… but these trainer figures seem dubious in that they always start a ton higher than the crank in the vo2max effort, but then come closer after 45 secs ish.
There’s no way that on every interval I’m suddenly putting in a bunch more effort with my left leg x seconds in. I think it’s far more likely that the trainer is heating up each time and it’s changing the power reading.
It would be interesting if a similar thing happens in standard mode.
I think part of what you are seeing there is the “ERG mode power smoothing” similar to kickr devices where the power reported is actually the power setpoint not a measurement.
On kickr you can turn this off so that even in ERG mode the reported power is real - not so on the victory I don’t think.
So the only way to get it to show the measured power is to not be in ERG mode at all.
Yeah, that’s ERG. I could try and do a session on level / resistance but the last time I did one the power number fluctuated so much I was struggling to keep my focus.
I recall there being a smoothing option in TR, but I can’t remember where it is.
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.
