Sunding SD 548 B Function Waterproof Bicycle Computer Odometer Speedometer

Sunding SD 548 B

Sunding SD 548 B speedometers on automobiles and states’ adoption of speed limits are closely related.

Today’s digital bicycle computers and GPS units are great stuff, but accurate measurement of distance on a bicycle, According to How Stuff Works, some early automobiles had two speedometer dials.

Speedometers for other vehicles have specific names and use other means of sensing speed. The new launch a Sunding SD 548 B Function Waterproof Bicycle Computer Speedometers and odometers.

The Sunding SD 548 B Speedometers and odometers work by counting the revolutions of the drive train of a vehicle. This Sunding SD 548 B Odometer Speed Set according to the wheel perimeter of bicycle.

Since installing tires that are larger or smaller than the manufacturer recommends affects the accuracy of the devices.


Sunding SD 548 B Function

Sunding SD 548 B


In Sunding SD 548 B Function  A smaller dial inside the vehicle allows the driver to know his speed, while a larger one on the exterior of the vehicle indicates the rate of travel for a police officer.

So Improvements in methods that allow officers to determine a vehicle’s speed eliminated the need for a second dial. Also Sunding SD 548 B Functions include current speed, maximum speed, trip distance, total distance and so on.

A tire with a larger circumference covers more distance per revolution than a smaller tire. Since this causes the device to provide a reading that is slower than the vehicle is actually traveling. So Drivers of vehicles with such modifications should take them into consideration to avoid speeding citations.

The difference in the speed shown by the speedometer and the true speed of the vehicle is due to the change in the distance traveled through each rotation of the tire.

Since A tire with a 20-inch diameter has a circumference of 62.8 inches and will cover 62.8 inches in one rotation.

Also Sunding SD 548 B Functions include current speed, maximum speed, trip distance, total distance and so on.

So a tire with a 23-inch diameter has a circumference of 72.2 inches and will cover 72.2 inches in one rotation.


  • Current speed
  • Odometer
  • Trip distance
  • Maximum speed
  • Average speed
  • Elapsed time
  • Scan and automatic cycle function
  • “+” “-” comparator
  • Speed scale
  • Setting tyre circumference
  • Setting the last value of odometer
  • Freeze frame memory


Sunding SD 548 B Feature

Sunding SD 548 B   Sunding SD 548 B

  • LCD screen display with backlight.
  • Sunding SD 548 B Odometer & Speedometer is a rain resistant.
  • Easily installation, good durability.
  • Battery powered by AG13 battery.
  • It is Easy to Read LCD display, Ideal companion for your riding.

  • Auto stop/start and auto power-saving feature.
  • Sunding SD 548 B Speedometer is a Waterproof & shockproof.
  • Innovative sensor combines speed and cadence into a single unit that mounts quickly.


    sunding SD548

  • Brand- Sunding

  • Model- SD 548 B
  • Type- Wireless.
  • Display– LCD with backlight.
  • Material– Engineering plastics, electronics componets.
  • Color– Black, red.
  • The Power source– 1 * 3V CR2032 battery for computer, 1 * 23A 12V alkline battery for                                                  wireless  transmitter.
  • Size- 4.6 * 4.6 * 2cm / 1.8 * 1.8 * 0.8in.
  • Weight- 24g.
  • Setting Speed Scale- (km/h, m/h)
  • Setting Tyre Circumference- (0mm-9999mm)
  • Package Size –12 * 7 *4 cm / 4.7 * 2.8 * 1.6in.
  • Package weight- 82g.


 Available for purchase on: Amazon