Set the circumference with Direto - Direto X - Direto XR on a cycle-computer or a not-Elite app

The circumference configuration on the external devices must be:

Real circumference / ( subdivided per ) 12.1.

Example: 

 - Wheel circumference = 2095 mm, so 2095 / 12.1 = 173,14

 - Must be set as 173 mm on the device