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cicli computer power measure(4 posts)

cicli computer power measurestevesbike
Jul 30, 2002 11:48 AM
anyone know how the cicli cm414 computer measures power output. Supposedly it measures current wattage, but obviously does this indirectly (since it has no drivtrain link). I noticed it measures current % of grade too--would it have some algorithm for computing virtual wattage. If so, any guesses how accurate it might be. If it's within the right ballpark, seems like a much cheaper alternative than srm etc.

thanks
re: cicli computer power measurecollinsc
Jul 30, 2002 11:54 AM
probably much in the same way that www.analyticcycling.com does. (dont ask me the details, i dunno)

But analyticcyling.com's little tool takes in weight, grade, rpms and speed to spit out a power result. Pretty neat, but I have no idea how accurate it is.
re: cicli computer power measuregray8110
Jul 30, 2002 2:38 PM
I have a HAC 4 and it doesn't use cadence so it isn't figuring it out based on cadence. But it is taking into account the current grade and speed as well as total weight of the rider + the bike. I don't know honestly how accurate it is.. It's kind of nifty. In terms of the exact # of watts, I don't think it's terribly accurate, but if you are zone training it seems pretty effective to me.. In combination with the HRM its a wonderful tool.

Spence
based onstr8dum1
Jul 31, 2002 10:31 AM
change in altitude, distance, speed and rider weight. pretty accurate when climbing. wont be anywhere accurate on flat roads.

kinda cool, but save your money if u want to really tarin with watts