Otherwise, the controller may be broken. About the battery: The power and voltage of the battery. When installing, make sure that the wiring is not reversed. Otherwise, it may damage the product. Note: Not waterproof, please do not drive on rainy days.Come with powerful controller guarantee big current supply. Suitable for both V brake and Disc brake. The maximum speed of the motor will be 30km/h. The open size of the front fork is 100mm. The size of the rim is 20Suitable for 20 inch bike. Crank speed sensor for pedal assist. Front fork open size: Approx. Assist: 5 magnetic point assist sensor. Brake Lever: Power cut-off brake lever. Wiring Mode: Waterproof wire for outgoing motor, common wiring for other. Feedback is very important to us. It is impossible to address issues if we do not know about them!
Faction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount.Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Electric Bicycle Components". The seller is "septembery-1" and is located in this country: US.
This item can be shipped to United States.