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Old 04-26-12, 09:41 PM   #1
Tall Cool One
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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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Old 04-27-12, 09:24 PM   #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.
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Old 04-28-12, 12:10 AM   #3
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The edge works out the wheel size for you using the GPS.
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Old 04-28-12, 12:15 AM   #4
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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.
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Old 04-28-12, 12:26 AM   #5
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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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