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  1. Replies
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    That "what's in a tube" article used the virtual...

    That "what's in a tube" article used the virtual elevation method.
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    Cadence varies with the demands of the ride: it...

    Cadence varies with the demands of the ride: it varies with power, with slope, with pedal force, with wind or drafting, with fatigue, with crank inertial load, with muscle type, and with the race...
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    Same telemetry system (Alphamantis) as used for...

    Same telemetry system (Alphamantis) as used for the real-time aero drag estimation at VSC.
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    That's probably okay. Except in a handful of...

    That's probably okay. Except in a handful of cases, cadence is a red herring.
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    That's true not just about VSC but all field...

    That's true not just about VSC but all field testing where you're looking for small differences. It's actually a pretty good thing: it means that the method is sensitive enough to pick up small...
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    I think the risk is overblown, that...

    I think the risk is overblown, that unpleasantness with Michele Bartoli's kneecap in the 1999 Tour of Germany was a freakish accident, he probably wouldn't have had much of a career left anyway, and...
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    You can get some tips here...

    You can get some tips here.
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    Click on "View-> Add Chart". You ought to see it...

    Click on "View-> Add Chart". You ought to see it there.


    Woah. That's nice. Lucky you.

    I generally tell people to do this five-minute test, just so they understand what they need to do. For...
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    The smaller the difference you're trying to...

    The smaller the difference you're trying to detect, the more care you need to take in the testing. If there are other riders on the track your data won't be very clean; whether it's clean enough...
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    Well, you can see why I generally try to keep my...

    Well, you can see why I generally try to keep my posts to a sentence or two.
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    Spruce or Tunnel or Euclid are your obvious...

    Spruce or Tunnel or Euclid are your obvious choices. Maybe Shasta but that's borderline. Centennial, Claremont, South Park, Lomas Cantadas should probably be off your list, though I don't think any...
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    Well, this is a long answer and I was hoping to...

    Well, this is a long answer and I was hoping to avoid it. The PT, as you know, measures at the rear wheel and doesn't depend on crank rotations. Let me describe how the other power meters work first,...
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    Hmmm. If you had a power meter that was precise...

    Hmmm. If you had a power meter that was precise and consistent but inaccurate, you could re-calibrate it so that it became precise, consistent, and accurate. The problem is that in the real world,...
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    Um, not exactly, but that's cuz I'm pedantic. I...

    Um, not exactly, but that's cuz I'm pedantic. I was trying to avoid a long answer cuz my long answers can be very long indeed. However, I think every power meter on the market can be in each of those...
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    You already linked to one of them. Ray asked me...

    You already linked to one of them. Ray asked me to help him set up his test protocol beforehand, and to analyze the data afterward. Others have done the same thing. Just cuz you can't imagine doing...
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    Your suspicion is wrong.

    Your suspicion is wrong.
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    From a practical point of view I haven't yet...

    From a practical point of view I haven't yet found any case where this causes a problem (but that doesn't mean I won't sometime in the future). It's an annoyance, especially when I'm trying to...
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    Hmmm. I haven't seen a 705 in at least a couple...

    Hmmm. I haven't seen a 705 in at least a couple of years. I know that the 705's altimeter is a bit "steppy" but I don't remember whether the 705 had the "lag" problem.
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    It depends on whether you're trying to do Tabatas...

    It depends on whether you're trying to do Tabatas at a particular targeted power (and you probably shouldn't be). Tabatas are done "full on" for a particular interval of time. I suppose if you were...
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    See below It appears so. The problem with...

    See below


    It appears so. The problem with the Garmin head units appears to be with a small lag in recording. It's easiest to see when you start up or stop: in those cases you can see that...
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    Every power meter has strengths and weaknesses....

    Every power meter has strengths and weaknesses. For my particular needs the PT is ideal but for others with different needs it may not be, and I try not to think that just because something works...
  22. Thread: Power Meter

    by RChung
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    1,672

    Oh, I didn't answer because I figured it was...

    Oh, I didn't answer because I figured it was unnecessary, and that you'd realize your error without me having to point it out. The new generation of Quarqs do have improved temperature compensation...
  23. Thread: Power Meter

    by RChung
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    Hmmm. I'm pretty sure I was paying attention to...

    Hmmm. I'm pretty sure I was paying attention to the real world conditions. What do you think I was missing?
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    Maybe, but lots of people aren't doing much...

    Maybe, but lots of people aren't doing much analysis (or are doing a poor job of the analysis they do). The real issue is whether a particular buyer is one of the people for whom this kind of...
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    Um, You talking to me? I'm a fan of the...

    Um, You talking to me?

    I'm a fan of the Stages for certain things but not for everything. When I look at power meters I look at the quality of the data they produce, but I understand that not...
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