This problem may be caused by the unstable connection between the Bluetooth display and the kit. Please connect the kit with the APP to see if the mileage can be displayed. 1. If the APP does not have mileage displayed, try “restore factory” in the setting page; 2. If the APP displays the mileage,
Please follow the steps as below to solve the problem: 1.Check whether the wheel, the controller, etc. are correctly installed, please install them according to the user manual 2. Tap “restore factory” in the setting page of the APP; 3. Recalibrate the gyroscope angle in the APP.