Here is how to change the battery on a Here is how to change the battery on a Sunding bicycle speedometer. If you have a bike speedometer made by sunding, watch this video to learn how to change the battery. If you have the wireless version of the sunding speedometer, then there’s a battery in the wheel speed sensor, and a separate battery in the speedometer, and you might need to change both of them. After you change the battery in the Sunding bike speedometer, you will need to set it to the proper diameter of your tire, so you’ll need to measure your tire and see how many millimeters it is, and enter the correct number of millimeters into the sending speedometer, and then choose whether you want it to show you miles per hour or kilometers per hour, and you will be done.
