Comparison Sigma Sport Rox 4.0 vs Garmin Edge Explore

Readings that can be displayed on the cycle computer display.

— Current speed. Displays the speed of movement at a given moment.

— Average speed. Display of the average speed of movement for a certain period, usually from the beginning of the trip to the current moment. The computer calculates this speed using the formula "total distance divided by total time." Note that in such calculations, only the time in motion can be taken into account, without intermediate stops (except for the shortest ones).

— Maximum speed. Displays the maximum speed reached for a certain period — for a trip, for a day, for all the time since the last reset, etc. The specific features of this function in different models may vary, they need to be specified separately.

— Ratio current/average speed. The ratio of the speed of the trip at the moment to the average speed for the entire trip. This function allows you to evaluate the current pace of movement and compare it with the pace in the already passed section.

— Current distance travelled. Displays the distance traveled since the start of the trip.

— Daily distance travelled. Displays the distance traveled for the current day. The change of day of the model with this function i...s monitored by its own clock (see "Functions").

— Total distance travelled. Displays the total distance traveled since the last reset of the cycling computer. In some models, it may be possible to reset this counter without a general reset.

— Current travel time. Displays the time elapsed since the start of the current trip. Usually, the countdown starts from the moment the movement starts; during short stops, it can continue or be paused, these points should be clarified separately.

— Total travel time. Displaying the total time spent in motion for a certain period — usually since the last reset of the bike computer settings (or resetting this counter separately, some devices have such an option). Usually, only the time in motion is taken into account, excluding intermediate stops, with the exception of the shortest ones, up to half a minute to a minute.

Cadence display functions provided in this cycle computer. Note that these functions require the installation of a separate sensor, which is not always included in the package.

Cadence is called the frequency of pedaling (pedaling). This information can be useful, in particular, for choosing the optimal gear and for evaluating the overall effectiveness of the training. The cadence should not be too low (this increases the load and wears out the knee joints) nor too high (this leads to rapid fatigue). Its optimal values may be different, depending on specific conditions; information about this can be found in special sources.

In addition to displaying the current cadence, cycling computers may have a function to display the average cadence (usually for a trip) and the maximum cadence (for a particular period, depending on the model). This data can be used for a variety of purposes, mainly for professional athletes and keen enthusiasts.

— Monochrome. Monochrome displays can be based on different colours, but in cycling computers, almost all of them are traditional black and white. Such screens are inexpensive and consume little power, while at the same time they can display most of the relevant data for the cyclist.

— Coloured. The colour screen is the unmistakable sign of an expensive cycling computer with plenty of features. This is because such screens are only really needed for some advanced features like GPS navigation on maps or advanced workout tracking apps.

The number of lines on the screen of the bike computer.

In this case, only lines intended for displaying basic data are meant — values of speed, time, etc.; strings for service characters are not taken into account. Thus, the number of lines is the number of parameters that can be simultaneously displayed on the bike computer display: for example, on a two-line screen, you can see the current speed and ride time. And in some models, there may be two parameters per line. The lines themselves in most bike computers are two, less often — three or four, it makes no sense to use more.

Touch screen — similar to those used in modern smartphones. Allows you to control the cycle computer by touching the image on the display.

Such control itself often turns out to be more convenient and visual than traditional buttons: you can display a variety of controls (lists, switches, sliders, etc.) on the screen, as well as explanations for them, which allows you to make the most of the device simple and intuitive. In addition, touch screens are extremely convenient for maps and navigation.

In general, it makes no sense to install touch screens in simple devices with basic capabilities, but they can be very useful for advanced models with extensive functionality. However, even among these models, touch displays are rare, due to a number of reasons. Firstly, for comfortable work, the screen must be quite large — however, even in the most advanced bike computers, its diagonal usually does not exceed 3.5", and in some it does not even reach 2.5". This is quite a bit for a touch screen. Secondly, it is almost impossible to work with the sensor by touch — unlike the buttons; and the probability of accidentally clicking “in the wrong place”, especially on the go, in this case is much higher. Thirdly, it is difficult to work with such devices in closed-type gloves (without cut off fingers): such gloves must have special inserts on the fingers, and the accuracy of pressing decreases noticeably — which can be critical, given the already mentioned small screen sizes.

The presence of backlight in the display of the bike computer.

This feature allows the rider to see the display in any light, even in total darkness. A backlit cycle computer is the best option for those who plan to ride frequently after sunset. However this function additionally consumes battery power; but in most models, the backlight turns on only when a special button is pressed, and you can see the display in just a couple of seconds.

— GPS module. The built-in GPS satellite navigation module is responsible for determining the current geographic coordinates of the device. How this data is used can vary. With some models, using GPS, the accuracy of speed and/or distance measurements is increased, others are able to record tracks of the routes traveled, which can be viewed on an external device or even on the bike computer itself. GPS data can also use an altimeter. And in the most advanced models, even full-fledged navigation with built-in maps is supported.

— Bluetooth. A wireless communication technology used to connect directly between different devices. The most popular application for such a connection is to connect a wireless sensor (see "Type"); in this case, one of the advantages of Bluetooth is its excellent noise immunity and the almost zero chance of overlapping different signals one on another, even with an abundance of wireless devices nearby. In addition, Bluetooth can be used to connect to a smartphone / PC (see "Functions"), as well as for more specific purposes, such as connecting a wireless headset and receiving voice prompts from a GPS navigator.

— Thermometer. Sensor for determining the ambient temperature. It can be useful both for assessing the current situation (for example, if a cyclist gets into the saddle hot after a warm-up...and is not sure about his perception of temperature), and, in some cases, for predicting the weather.

— Altimeter. Sensor to determine the current altitude above sea level. Altitude can be determined by two main methods: barometer and GPS (see relevant paragraphs). In the first case, the pressure difference between the reference and current altitude is determined; in the second, a database is used about the height of the terrain with certain coordinates. The height designation format can also be defined: in some models it is indicated relative to sea level, in others it is relative to a conditional zero point specified by the user. Anyway, the information from the altimeter can be useful for assessing the elevation changes during the trip.

— Heart rate monitor. Ability to determine the current heart rate. The pulse is one of the most important parameters for more or less serious training; for different purposes (weight loss, keeping fit, gaining muscle mass), it is required to maintain different heart rates during exercise (its specific value can be determined using special methods). The heart rate monitor sensor is usually made remote and fixed on the body — this is due to the peculiarities of this type of measurement. Note that the mention of a heart rate monitor does not necessarily mean the presence of such a sensor in the kit — it may need to be purchased separately. Also note that the bike computer itself can support advanced heart rate monitor functions: maximum heart rate, average heart rate, signals about work in the optimal range, etc.

— Barometer. Sensor for determining the current atmospheric pressure. This information may be used for various purposes. So, in some models, the operation of the altimeter (see the relevant paragraph) is based on data from the barometer. And changes in atmospheric pressure can be a sign of certain changes in the weather — for example, a sharp "fall" in the barometer usually indicates the approach of rain.

— ANT+ support. Bike computer support for ANT+ data transfer technology. This technology has been specially developed for use with sports devices, including compact ones. It features good connection reliability and economical power consumption. In cycling computers, ANT+ can be used both to connect sensors and to connect the computer itself to a smartphone or other gadget that supports this technology. At the same time, ANT + devices are compatible with each other in terms of basic capabilities regardless of the manufacturer, which allows, for example, to supplement the bike computer with “non-native” wireless sensors if the standard ones are out of order.