Customize or set the wheel circumference for a speed or speed+cadence sensor in the Wahoo app for iOS or Android or for the ELEMNT app for iOS or Android for optimal speed and distance accuracy with these steps:
1. With your sensor paired and actively connected to the app, navigate to the paired RPM SPEED sensor page:
In the Wahoo App -- Home > My Sensors > Wahoo Speed XXXX or
In the ELEMNT app -- Settings > Sensors > Wahoo Speed XXXX]
2. Select Wheel Circumference.
4. The wheel circumference will be set for all Workout Profiles associated with the sensor.