

Maybe I'm pumping the tires up a bit too much?Īnyway, I was wondering if the Garmins have to be set to tire sizes. The chart lists a wheel size of 26" x 2.10" as 2068mm, but the actual measurement is 2110mm. The chart lists a wheel size of 26" x 1.75" as 2023mm but the actual measurement of the wheel was 2038. Computer Accessories Computer Buy Online & Pick Up in Warehouse. It might not amount to much on a short ride but over several months of 7km every day, with a loss of 72mm with each revolution of the wheel, I'd say it was a considerable loss. So I've been losing that much with every revolution of the wheel. Attaching the tape measure around the wheel, I got a reading of 2110mm, a difference of 72mm, or 2.38 inches. Today, I decided it really ought to be measured. That was then set in the computer.Ī few months ago I decided to go back to black tires, but I didn't measure them for the purpose of resetting the computer.

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