Follow these steps to configure your Earth 580C display for your bike model.
Double-tap the "M" button located on top of the display. This will bring up the settings menu.
Use the navigation buttons to scroll to the bike configuration icon.
Press the "M" button once to enter the bike configuration menu.
Scroll to the battery setup option and press "M" to enter.
Select 36V for Prime models.
Select 48V for T-Rex models.
Press the back button until you return to the main screen.
All done! Your display is now set up.
If your bike is fitted with 29” wheels, you will also need to update the wheel size in the settings menu to ensure the speed reading is accurate.