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  1. #1
    Senior Member Tall Cool One's Avatar
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    Wheel Circumference Measurement for Garmin Edge 500

    I am in the process of setting up my Garmin Edge 500. I have a 700c wheels and run 25 mm Continental GP4000s tires. My best effort at measuring the diameter of these wheels was 680 mm. Hence, the circumference would be 680 x 3.14... which comes out to 2136 mm for the circumference. Is that within the proper range for this setup?
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  2. #2
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    Better yet, take a bike ride on a measured course and use the late, great Sheldon Brown's method. Google maps and the like make it relatively easy to set out a measured course and you get probably the most accurate calibration for your weight, tire, pressure, and courses you will ride in the future.

  3. #3
    Zoom zoom zoom zoom bonk znomit's Avatar
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    The edge works out the wheel size for you using the GPS.

  4. #4
    Senior Member mechBgon's Avatar
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    Alternately, just measure the effective circumference the obvious way: mark the tire, line that up with a mark on the ground, sit on the bike and roll it forward one revolution. Make a second mark on the ground where the tire's mark ends up. Measure the distance between the two marks.

  5. #5
    Senior Member Shimagnolo's Avatar
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    Quote Originally Posted by znomit View Post
    The edge works out the wheel size for you using the GPS.
    ^This.

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