Belt skid is generally caused by insufficient tensioning force, this situation can be solved by re-tensioning the belt or replacing the belt, or reinstalling the belt, if you need to replace the belt, please contact service2@thinkrider.com , we will provide you with a new belt. You can learn how to troubleshoot in the following video.
X7 tensioning belt video: https://youtu.be/6b4Cl2j7Yh8
X7 replacement belt video: https://youtu.be/qka3MjsVZmE
X5 tensioning belt video: https://youtu.be/bLvaisZls-Y
X5 replace belt video: https://youtu.be/k5RhTNC86dc
A1 tensioning belt video: https://youtu.be/bcR_TziDKUM
A1 replace belt video: https://youtu.be/JKxXDe9Xnl4
X5 video of the belt can be adjusted: https://youtu.be/UKb2ZtIFQGU