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PostPosted: Mon May 15, 2017 1:50 pm 
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Posts: 685
One other thing of note, is that the researchers commented they don't know if certain meters are off because they came that way from the factory of that they have become less stable over time, which raises the question of whether some meters are giving consistent results.


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PostPosted: Mon May 15, 2017 1:55 pm 
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Location: Gien, France
glepore wrote:
kulivontot wrote:
And you'll notice that the great many of these cyclists are continuing to train effectively nonetheless. Don't get me wrong, I'm all for nerding out with data, but the reality is that the big picture is that it doesn't really matter unless you're using some very advanced techniques. The fundamentals of training don't change with 1%, 2% or even 5% data errors.


I've been using a powermeter since around 2003-started with a square taper srm. Have had a number of others, and am currently on Stages. I don't doubt that if I was conducting a scientific study of my physiology it might be less than optimal, but I'm not, I'm simply training to be an effective cyclist. For that purpose, it is perfectly adequate. The price point has allowed me to have a powermeter on a couple bikes, whereas with a crank based one that would be stretching the budget.

So long as you consistently use the same device, and use that device to test, AND the device is consistent, then you'll be fine. I'm aware of the argument that a 5% tolerance could conceivably lead to a 10% swing (5% in both directions) leading to say, a 20-30w inaccuracy, but in my experience that's not how these thing work. The errors tend to be somewhat repeatable. Weakness are identifiable-stages are known to have somewhat of a laggy response to very short efforts, so maybe less than ideal for track sprinters. I am well aware that Doc Coggan and others would disagree, but the level at which they're used to analyzing data goes well beyond where I'm at. Anyway, its more or less the longer term trends that matter in power training.

And, we've beaten this to death. The study cited isn't really new information. Folks on either side of the debate aren't going to convince each other. But I'm not regularly getting trounced by guys on SRM's because they're on SRM's.


Completely agree with you !
Pro need precise powermeters. If you're not a pro, most of the time the goal of the powermeter will be to find the good speed during a climb, because a regular speed is the warranty of the best climbing time. If you start at 600W and finish at 250W, it's not a good deal, a regular 400 is better anyway. That info will be given by most of the powermeters of the market.

When you don't know a climb, you just put the numbers of the Strava KOM and make an estimation of your speed depending on your power curve.

For me, powermeter is a speed regulator and you can be stronger than other competitors, just because you know exactly where the red zone is.

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Posted: Mon May 15, 2017 1:55 pm 


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PostPosted: Mon May 15, 2017 5:00 pm 
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Posts: 245
Seems fair. I've just got a Stages Campy one and am very happy with it. It has been consistent and is giving me higher numbers as I've got faster/fitter. Takes a while to get used to making some use of it but I think I'm getting there. Still find it hard to ride a consistent power output but I agree if you use it to regulate speed you go faster. I've managed my first 24 mph solo ride on it by aiming for my Threshold power and trying to hold it there without going too much over and also not letting it drop on descents. Never been above 23 before so was very pleased.

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PostPosted: Tue May 16, 2017 2:15 am 
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Location: Geelong
glepore wrote:
But I'm not regularly getting trounced by guys on SRM's because they're on SRM's.

Owning and knowing how to use a PM - regardless of brand - are mutually exclusive. SRM or otherwise. But assuming all did know, I'd take the athlete with the more accurate data.

kulivontot wrote:
And you'll notice that the great many of these cyclists are continuing to train effectively nonetheless. Don't get me wrong, I'm all for nerding out with data, but the reality is that the big picture is that it doesn't really matter unless you're using some very advanced techniques. The fundamentals of training don't change with 1%, 2% or even 5% data errors.

True enough. But. 20w means a lot to me and I am a Hubbard. I'm not going to mitigate inaccuracy simply because the perception is my ability does not warrant an accurate power meter.


This study (from what I read) also does not factor in temperature changes. Tests were done in what sounds like a consistent environment. And we know some brands (SRM) have known issues with drift as temperature changes.

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PostPosted: Tue May 16, 2017 12:37 pm 
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20w in intra-unit consistency is a lot and enough to make it uselss.. 20w from power meter to power meter is less of an issue.

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PostPosted: Tue May 16, 2017 2:23 pm 
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Thats the gist of it. Though would be nice if we can have someone willing to commit time and resource to do similar study with more sample sizes from each brand. Not easy.


Sent from my iPhone using Tapatalk


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PostPosted: Wed May 17, 2017 8:52 am 
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ichobi wrote:
Thats the gist of it. Though would be nice if we can have someone willing to commit time and resource to do similar study with more sample sizes from each brand. Not easy.


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In case you haven't read today's blog by Ray, where he cover the basis of DCR Analyzer https://www.dcrainmaker.com/2017/05/the ... o-use.html

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PostPosted: Mon May 22, 2017 4:23 pm 
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Joined: Sun Aug 08, 2010 10:18 pm
Posts: 634
Any news on Specialized 2018 powermeter.

The Speedzone Ant+ power spider doesn't exist no more....


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PostPosted: Tue May 23, 2017 1:53 pm 
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Joined: Tue Jan 13, 2009 2:35 am
Posts: 685
I didn't know Specialized ever planned to do a PM. The previous power spider was just a re-badged Quarq.


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PostPosted: Wed May 24, 2017 1:13 pm 
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Joined: Fri May 12, 2017 12:19 pm
Posts: 9
Is the Pioneer meter for Ultegra 6800 still a relevant option? I'd prefer to hook it through my Wahoo Bolt instead of their head unit.


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