Tuttio Adria26 Ebike Controller – Choose the Right Controller for Your Ride Tuttio Adria26 electric bikes come with two different controllers, designed for different bike configurations. These controllers are not compatible with each other. Old Controller: Designed for Adria26 bikes with a physical dual-drive switch on the handlebar. If your bike has this switch, please choose the old controller. New Controller: Designed for bikes without a physical dual-drive switch. If your handlebar does not have a dual-drive switch, please choose the new controller. ?? Important: Please carefully check your bike’s configuration before purchasing to ensure you select the correct controller and avoid compatibility issues. The two controller models are not interchangeable, and choosing the wrong one may result in installation failure or malfunction. If you are unsure or cannot clearly identify your controller, please contact customer support with photos of your bike or controller, and we will help you select the correct model. Please note that accessories require a short preparation period before shipment. The standard delivery time for accessories is approximately 9–12 days. For accessories, returns or exchanges are only accepted in the case of confirmed quality issues. We are unable to accept returns for reasons such as personal preference or incorrect purchase.