The speedometer for a bicycle is a necessary thing for athletes who need to know the results of speed in order to control the load and monitor the improvement of their physical abilities. Depending on their functionality, the devices are divided into the following types:
- mechanical;
- electronic, which can be wired and wireless.
Mechanical speedometer for bicycle
The design of the device consists of:
- drive wheel - must contact directly with the tire wheel, which is necessary to obtain the correct speed data;
- rope - it should be well stretched and not twisted;
- showing devices with a magnetic disk inside. The bicycle speedometer for the bicycle, by means of a swiveling arrow, converts the rotation of the wheel, which is transmitted from the drive.
The advantages of a mechanical speedometer include:
- not exposure to electromagnetic interference;
- no need for batteries;
- smooth work.
As shortcomings of the device can be noted such points:
- the need for periodic lubrication;
- It is necessary to maintain the cleanliness of tires, as dirt can interfere with their work;
- inability to save data;
- The device brakes the rotation of the wheel.
Electronic speedometer to bike
The electronic speedometer assumes the presence of many functions, which include:
- measurement of the current speed;
- reflection of average speed;
- distance measurement;
- fixation of the total mileage;
- shows the time spent on the road.
The principle of the device consists in counting signals from the sensor for a fixed period of time. The device can be wired and wireless.
Depending on the installation site, there are speedometers, which are worn on the hand, on the steering wheel, on the handlebars, have a universal fastening. Wrist instruments are equipped with a built-in pulse sensor and work like a tonometer.
When choosing an electronic speedometer, it is recommended to pay attention to the following points:
- the housing of the device, which must be well protected from exposure to rain, direct sunlight and road dust;
- the size of the display, the presence of lighting on it;
- reliability of the components of the device that are installed on it (reed switch, mounting pad, magnet, couplers, pads);
- resistance to shock and vibration.
Electronic speedometers have such advantages:
- no need for lubrication;
- saving data in memory;
- High accuracy of indications, which is determined up to tenths of a fraction;
- the ability to adjust to any size of the wheel, while the mechanical speedometer is designed to a certain size.
But the devices have their drawbacks, which include:
- the need to change the batteries;
- exposure to electromagnetic interference from power lines or mobile phones;
- update the readings on the screen with some delay.
A wireless speedometer for a bicycle is a kind of electronic device and is much more expensive than a wired one. It is designed in such a way that the signal from the sensor is transmitted via a radio channel. The wireless speedometer is ideal for those cyclists who prefer to travel long distances.
Thus, you can pick up an analog speedometer for a bike with certain characteristics, the presence of which will allow you to receive the readings that you need.