This bicycle derailleur shifter is only compatible with electric bikes that are equipped with a gear system. If your bike does not come with a gear system (such as models like BK2, BK5, BK8S, BK35), this shifter is not suitable and cannot be retrofitted. It is essential to select the correct model based on your bike's specifications.

Important Notes:

• Compatible only with bikes that have a gear system. If your bike is not equipped with a gear system, such as the BK2, BK5, BK8S, BK35, please do not purchase this item, as it cannot be installed through modification.
• This accessory may be shipped directly from China, with an estimated delivery time of 10-15 days.

Please verify that your electric bicycle has a compatible gear system before making a purchase. For any questions or assistance, please don’t hesitate to contact our customer service team at contact@hitway.eu.