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  1. #1
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    Factor Power Measurement Cranks

    I saw this, did a search on the forum and didn't find a thread, so figured I would start one since there seems to be a lot of power measurement device discussions lately.

    These/this looks interesting:

    http://www.factorbikes.com/factor-at...se5%5B2%5D.pdf

  2. #2
    Senior Member MegaTom's Avatar
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    Cool looking crank. Cool looking, but slow, website. What's the price and how does one buy it. They make no mention of dealers or a future release date. Just more vaporware, I guess...

  3. #3
    John Wayne Toilet Paper nhluhr's Avatar
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    Whoa whoa whoa... 12hr battery life? So now I have to plug the bike in every couple rides?

  4. #4
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    I gotta get me some of that 4Hz data transmission rate.

  5. #5
    Senior Member WhyFi's Avatar
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    Quote Originally Posted by MegaTom View Post
    Cool looking crank. Cool looking, but slow, website. What's the price and how does one buy it. They make no mention of dealers or a future release date. Just more vaporware, I guess...
    I was looking at this the other day - my understanding is that this is an option when buying complete bike, but not available separately at this time.
    It's the spandex.

  6. #6
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    http://www.bikeradar.com/road/news/a...-august-37743/

    Looks like these guys know what they are doing...
    I don't even use the offensive term "Fred." -- Sheldon "All Cyclists Are My Friends" Brown (1944-2008)

  7. #7
    Senior Member MegaTom's Avatar
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    Quote Originally Posted by Phantoj View Post
    http://www.bikeradar.com/road/news/a...-august-37743/

    Looks like these guys know what they are doing...
    Thank you.

  8. #8
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    Quote Originally Posted by svtmike View Post
    I gotta get me some of that 4Hz data transmission rate.
    Standard ANT+ rate, and it beats the 1Hz rate from just about every non-SRM power meter out there.

  9. #9
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    Quote Originally Posted by achoo View Post
    Standard ANT+ rate, and it beats the 1Hz rate from just about every non-SRM power meter out there.
    You sure you know what a Hz is? It's not the same as samples per second.

  10. #10
    Senior Member DaveWC's Avatar
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    Quote Originally Posted by svtmike View Post
    You sure you know what a Hz is? It's not the same as samples per second.
    From the bikeradar article...

    The Factor Power Crank can communicate in both ANT and ANT+. The latter allows compatibility with Garmin computers, but the 4hz (four times per second) rate of data transmission can be limiting.

  11. #11
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    Quote Originally Posted by DaveWC View Post
    From the bikeradar article...
    I understand that he's not the only one mis-using it. A data transmission rate of 4Hz is simply incorrect and is not the same as transmitting 4 samples of data per second.

    And yes, I am being pedantic.

  12. #12
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    Quote Originally Posted by svtmike View Post
    You sure you know what a Hz is? It's not the same as samples per second.
    http://en.wikipedia.org/wiki/Hertz

    The hertz (symbol Hz) is the unit of frequency in the International System of Units (SI). It is defined as the number of cycles per second of a periodic phenomenon
    A "periodic phenomenon". Say, like sending 4 samples a second? Or maybe even just one sample per second?

    If you're going to be pedantic, it's best not to be wrong.

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    Woah. "The Factor Power Crank is going to be made available separately, costing 2,000 when it goes on sale in August." That's ~$3000.

  14. #14
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    Quote Originally Posted by achoo View Post
    http://en.wikipedia.org/wiki/Hertz



    A "periodic phenomenon". Say, like sending 4 samples a second? Or maybe even just one sample per second?

    If you're going to be pedantic, it's best not to be wrong.
    Correct. The data rate is not the sample rate. But we could go back and forth ad infinitum and this thread would be ruined so I will apologize now for derailing over silliness in the spec sheet.

  15. #15
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    Quote Originally Posted by svtmike View Post
    Correct. The data rate is not the sample rate. But we could go back and forth ad infinitum and this thread would be ruined so I will apologize now for derailing over silliness in the spec sheet.
    What? Someone deliberately avoiding a derailed thread in the road forum?

    Isn't that grounds for the ban hammer?

  16. #16
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    Quote Originally Posted by RChung View Post
    Woah. "The Factor Power Crank is going to be made available separately, costing 2,000 when it goes on sale in August." That's ~$3000.
    What does it have over an SRM, then?

  17. #17
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    Quote Originally Posted by achoo View Post
    What does it have over an SRM, then?
    Looks like they are pushing the ability to get really geeky with your pedal stroke, same kind of stuff the Vector people have been talking about. Left vs. right power, plotting the force vs. crank angle, looking at back foot down pressure.

    Conventional wisdom, I believe, doesn't put a lot of value in this stuff, though.
    I don't even use the offensive term "Fred." -- Sheldon "All Cyclists Are My Friends" Brown (1944-2008)

  18. #18
    pan y agua merlinextraligh's Avatar
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    Quote Originally Posted by Phantoj View Post
    Looks like they are pushing the ability to get really geeky with your pedal stroke, same kind of stuff the Vector people have been talking about. Left vs. right power, plotting the force vs. crank angle, looking at back foot down pressure.

    Conventional wisdom, I believe, doesn't put a lot of value in this stuff, though.
    The newer Quarqs give right/left balance data. I don't see a whole lot of value in it. I've talked to a couple of CTS coaches, including Carmichael, and they basically said unless it's grossly out of wack don't worry about it.

    I think the added data on force versus crank angle etc., would be of even less value.
    You could fall off a cliff and die.
    You could get lost and die.
    You could hit a tree and die.
    OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.

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