Stages Cycling app
If you are using the ride recording feature in the Stages Cycling app to view your gears while using TrainerRoad, select the StagesBike tab and set the bike to External control.
However, if you are using the Data screen on the Stages Cycling app, there is no need to set a control mode.
In order to pair the Stages Bike, click the Menu icon in the left top-hand corner of the calendar page.
This will bring up the Calendar, Workouts, Plans, and Devices tabs. Click on the Devices tab.
Click on the Stages Bike from the pairing devices menu.
After it pairs, click on the Stages Bike again. ERG mode will already be enabled.
Click the back arrow at the top left of the trainer screen and go to Workouts. You will be brought to the Workout library. Select your Workout and have a good ride.