Sunding manufactures affordable bicycle electronics, specializing in wired and wireless bike computers, speedometers, and essential cycling accessories.
Sunding is a specialized manufacturer of electronic cycling accessories, best known for its extensive range of budget-friendly bicycle computers and speedometers. Produced by Shenzhen Sunding Electronic Co., Ltd., these devices provide cyclists with essential riding metrics such as current speed, total distance, trip time, and maximum speed.
The brand offers a variety of wired and wireless models, including the popular SD-548, SD-563, and SD-576 series, which are designed to be weather-resistant and easy to install. Sunding products are widely distributed through global e-commerce platforms, serving as a go-to choice for entry-level and recreational cyclists seeking reliable performance tracking.
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In ODO (Odometer) mode, press and hold both the LEFT and RIGHT buttons simultaneously for about 3 seconds. This will clear the tire circumference and mileage settings.
When the wheel size input screen appears (often '2060' by default), calculate your tire circumference (Diameter in mm x 3.14). Use the RIGHT button to adjust the flashing digits and the LEFT button to confirm.
A black display is often caused by exposure to direct sunlight or high temperatures. Allow the unit to cool down in the shade. If the display is weak or blank, try replacing the battery.
If the computer receives no signal for 300 seconds, it will automatically enter Sleep Mode to save battery. It wakes up and resumes separate data collection when a signal is received or a button is pressed.
Most models like the SD-548 and SD-563 use a standard button cell battery, such as the AG13 (LR44) or CR2032. Check the back cover of your specific model for the correct type.