I've installed a Polar Power Sensor on my bike.
Yesterday I did a test ride on a uphill and I discovered (comparing with an online watt calculator) that power value are higher of 20 watt (300 watt on Polar, 280 watt on Analytic cycling power calculator).
Can I adjust and in which manner the values of chain weight and length in order to have next ride right power values?
Yesterday I did a test ride on a uphill and I discovered (comparing with an online watt calculator) that power value are higher of 20 watt (300 watt on Polar, 280 watt on Analytic cycling power calculator).
Can I adjust and in which manner the values of chain weight and length in order to have next ride right power values?