Originally Posted by BCDrums

I use a Cateye and I compare its recorded distance to the distance I get on Ride with GPS, and at first they did not match—the Cateye was higher. So I began to decrease the circumference number in the Cateye by 5mm at a time until they were close, but still they never match. Finally I decided there was a little bit of deviance in both.

RwGPS shows a distance in tenths, whereas the Cateye gives it in hundredths. But if I switch to the RwGPS Edit Ride page, and Show Metrics, it gives a number in ten-thousandths, e.g. XX.xxxx. I find it hard to believe that is accurate; a ten-thousandth of a mile is 5 feet.