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  1. #1
    Senior Member Tcchap's Avatar
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    Calibrate Polar HRM/Cycle Computer

    Just got a Polar CS 200 HRM for Christmas and I love it. But...I have noticed that there may be something wrong with the calibration for the cycle computer. It seems to be about 1/10 of a mile off for each mile. I have a route leaving from my house that I have measured many times with both of my cars and my old $10 walmart/schwinn cycle computer. The first ride I took with it is a 10 mile out and 10 mile back and it came up short on the mileage. I have 700 x 23 tires and I entered the correct code...just wondering if anyone else has come up against this with Polar. Thanks.
    Just kicking down the cobblestones, lookin' for fun and feelin' groovy.

  2. #2
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    Three ways, each with greater accuracy than the preceeding one.

    Sheldon Brown's site (may he rest in peace) knows all, tells all:

    Deriving tire diameter from ISO/ETRTO numbers
    Roll-out Test for Super Accuracy
    Using a measured course to fine-tune your setting

    I've used the measued course method, determining the distance beginning of intersection to beginning of intersection, from Google Maps. When my 3 mile commute goes off by 0.02 miles, I know its time to pump up the tires. I suggest going directly to the measured course method, the longer and straighter, the better.

  3. #3
    Senior Member Tcchap's Avatar
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    Thanks, looking on Sheldon's site, I did have another number for my wheels than he had in his charts. I set it and can't wait to try it this weekend.
    Just kicking down the cobblestones, lookin' for fun and feelin' groovy.

  4. #4
    Senior Member Tcchap's Avatar
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    Just tried it out and it seems to be right on. There has to be something wrong with my mph though I know I was riding. Thanks again.
    Just kicking down the cobblestones, lookin' for fun and feelin' groovy.

  5. #5
    Miami Biker
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    Greg Lemond
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    arent they great? Im using a cs600X and all I got to say is wow.
    -Miami Biker: Polar heart rate monitors? I use em...
    Currently using Polar CS600X

    Polar heart rate monitors progress

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