Wheel size in mm

[Theolegit]

Hi does anyone know what wheel size I should enter into my garmin for the levo?
The auto detect function returns useless data and I alway thought it was 2250mm however that gives a reading of 22.5 miles on a 17 mile ride! Any suggestions.

 

[Mabman]

The simplest method is to roll your wheel starting with the valve at the 6 o'clock position make a mark on the floor. Roll the wheel until the valve is once again at the 6 o'clock position and measure the distance between the two.

 

[Theolegit]

What wheel sensor do you have for your Garmin. The stand alone rubber strap style sensor that fits to the hub re-calibrates itself when you ride it so I don't think it's massively important how accurate the wheel size you put in is.
The older style combined sensor it is.

as above. But I'd mark the tyre with a pen.

Thanks all, the speed/cadence sensor is built in on the Specialized turbo.