Bicycles are large items. In order to ensure the quality of customer service and avoid unnecessary troubles, please see the following notes:1. After the bicycle is installed, the vehicle should be inspected as a whole to avoid the danger caused by loose screws.2. We provide technical support for installation and commissioning. There are left and right pedals, L represents counterclockwise rotation on the left; R represents clockwise rotation on the right.3. After installing the disc brake bike, be sure to keep the front wheel disc brakes and disc brake pads on the left side in the riding direction.4. Due to the slow transportation of large items and high freight rates, if the logistics information is not updated in time, please contact us for real-time transportation information.5. If any parts of the bicycle are damaged, the parts can be replaced. Please contact customer service in time.