Circumference

To get accurate results from a speed sensor, input your wheel circumference but only if you use a classic trainer - it then returns the speed, and the speed is correct only when the circumference is set properly.
If you use a smart trainer or power meter, it immediately returns watts, and there is no need for a circumference input.
There is a reference sheet of wheel sizes in our app:

wheel_cmc7.jpgwheel_cmc6.jpgwheel_cmc4.jpgwheel_cmc5.jpgwheel_cmc3.jpgwheel_cmc2.jpgwheel_cmc1.jpgwheel_cmc.jpg

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