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rbent Forum
https://rbentonline.org/YaBB.pl General Category >> Technical >> Article on pedaling cadence https://rbentonline.org/YaBB.pl?num=1252415142 Message started by FlyingLaZBoy on Sep 8th, 2009, 8:05am |
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Title: Article on pedaling cadence Post by FlyingLaZBoy on Sep 8th, 2009, 8:05am Worth a read..... although I disagree with his statement that a "3% grade is....almost invisible".. ;) but not with his statement that it "requires roughly a doubling of your power output to stay at the same speed." :( http://www.adventurecycling.org/resources/efficiencymatters.pdf |
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Title: Re: Article on pedaling cadence Post by goatstick on Sep 8th, 2009, 10:16am Good article intent and appears generally correct but borders on being technically misleading possibly due to brevity apparently required for most of the article to be an advertisement. Under undesirable side effects, items 2 & 3 are quite a bit more complicated issues that don't appear to take into account anything but leg muscles and appear to assume a low power output spin vs a high power output mash. Maybe do a little reading on how ATP is produced and from what sources to get a better idea of what is most likely occurring here. Note that I am an AC member, mostly for their good cycling maps, and notice that many of their articles are a little too brief technically to be generally useful. I think mainly they are targeting the novice rider and the articles are written to appear to be technically informative but really aren't. I'd recommend they choose a 'good suggestions' format instead. (scientists get really tired of dealing with pseudo-science of this nature) |
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Title: Re: Article on pedaling cadence Post by MrOverdressed on Sep 8th, 2009, 3:35pm There is an under stated relationship between cadence and crank length. A longer crank (if your knees can handle the extra flex) enables a slower cadence. For example my 200mm length crank has an circumference of 1255mm while a 160mm drank has a circumference of 1005mm. So Im able to use a higher gear and spin at 25% less RPMS and have the same amount of pressure on my pedals with the 200mm crank as the person with the 160mm cranks. :) |
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Title: Re: Article on pedaling cadence Post by irodguy on Sep 8th, 2009, 4:50pm MrOverdressed wrote:
Of course if you have short legs, your knee ends up in your chin :-) |
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Title: Re: Article on pedaling cadence Post by Kwijybow on Sep 8th, 2009, 5:56pm Quote:
Yeah I had a chuckle at the thought of me turning 200mm cranks! :D |
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Title: Re: Article on pedaling cadence Post by FlyingLaZBoy on Sep 8th, 2009, 10:27pm MrOverdressed wrote:
Uhhh, Terry, it seems that you're missing the point of the article.... they're saying that it's better to use a higher cadence... |
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Title: Re: Article on pedaling cadence Post by goatstick on Sep 8th, 2009, 11:20pm Kwijybow wrote:
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Title: Re: Article on pedaling cadence Post by MrOverdressed on Sep 9th, 2009, 3:25am FlyingLaZBoy wrote:
Uhhh, Terry, it seems that you're missing the point of the article.... they're saying that it's better to use a higher cadence...[/quote] No Bro, I didnt miss his point. His basis for recommending higher cadences is less knee strain. At a higher cadence we are pushing less against the pedals. Im also saying that the same benefit can be obtained from a longer crank at the same cadence. My 200mm cranks at 60rpm/cadence in a higher gear has the same amount of foot&knee pressure as 160mm cranks in a lower gear at 80rpm/cadence. :) |
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Title: Re: Article on pedaling cadence Post by MrOverdressed on Sep 9th, 2009, 3:30am Kwijybow wrote:
I thought All'U'Yall seen my 200mm cranks. They where custom made by Velokraft and ordered through bentup cycles. http://www.velokraft.com/short-cranks.html |
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