Calculate the outer diameter of the wheel. Recalculation of tire size

Such a device will be very useful when testing sound chains of receivers, televisions and other industrial and self-made equipment. The generator scheme is given according to the book of V. G. Borisov "Young Radio" (from 145-146 in the 8th edition), with minor changes.

Scheme of the generator zh.

The generator is assembled on the K155L3 chip (you can use K555L3), which represents 4 elements 2I - not. Immediately the generator form the connected Logic elements DD1.1, DD1.2, DD1.3, included inverters. CONDACTOR C1, with a capacity of 0.47 μF, creates a positive feedback between DD1.2 output and the input of DD1.1. In principle, the signal can be removed from the output DD1.3, the element DD1.4 is simply inverted. The pulse frequency can be changed by the resistor variables R1. R2 resistor serves as a regulator of the output level. Resistance resistor R1 680 Ohm, R2 10 com, variable resistors can be of any type. With the parameters specified in the scheme, the pulse frequency can be changed within 500 - 5000 Hz. The VD1 diode is used to protect against the supply of incorrect polarity, any low-power diode is suitable as it, for example, D220. The scheme is mounted on a small batch. But thanks to the small number of parts, you can perform a mounted mounting scheme.

Generator assembly

The regular supply voltage of the K155 and K555 chip is 5 V, but the generator is operational when nutrition of the circuit from the "square" battery with a voltage of 4.5 V (battery type 3336 in the old nomenclature), the voltage drop on the VD1 diode does not affect the performance of the device. The device can be used to verify the operation of sound frequency amplifiers.

Car owners use a tire calculator for seabling tires and disks suitable size. All calculations are performed online. The user will not have to do long, incomprehensible calculations. The application is multifunctional, because the motorist will be able to understand how the dimensions of the wheel can change, taking into account the change in the size of the tires and disks. Consider the features of using the service.

Tire calculator functionality

Help with selection of tires suitable for a specific car in size and characteristics, the Calculator of the tire selection will be able. The service owners of the transport are serving when it is time to replace rubber and discs on the vehicle. In order not to spend time on meaningless "re-overwhelms", checks, use the offered online service. The capabilities of the tire calculator:

• you can calculate the size of the autoresine;
• the service provides different parameters - wheel diameters, changes in the height of the lumen between the road and auto (clearance), the expansion of the gauge;
• assistance in the transfer of inches to millimeters Ilfi on the contrary, the use of the American and European dimensional table.

The tire calculator was designed to accelerate the selection of rubber, making the procedure at times easier. Since each owner of the car faced the difficulties of choice, online calculators were very quickly gained popularity from users.

How to use a tire calculator

There are several tips that will help to use a tire size calculator for destination. Step-by-step instruction Consists of the following steps:

1. The form you will need to enter the size of the tires installed on the car, as well as those that would be installed.
2. A special table with the results of calculations will appear before the user. From these data it will be possible to find out which autoresina is necessary for specific transport.
3. After selection, the tires can be transferred to the calculation of the size of the disks. Here you will need to set the exact data - the maximum / minimum width of the disk installed on the car. All calculations service will perform automatic mode.
4. If you need to translate inches to millimeters, you can use the online converter. This action will allow you to find analogues with American sizes and with European. Comparison through the tire calculator will be as accurate as possible, since all the necessary information is made to the database of the online service.

The total procedure for selecting is very simple, but from the owner of the car it will be necessary to introduce initial data. Parameters must be as accurate as possible so that there are no errors or inaccuracies in subsequent results.

You can use such a service on our website. The program is in free access, anyone can produce settlements in a few minutes. To simplify the process of use, it is worth using the instructions.

When choosing discs, it is obvious that you need to pay attention to their parameters. At the same time, in addition to the technical parameters that we consider below, there are also structural and aesthetic parameters.

Divided into cast, stamped and wrought. Each type of discs has its advantages and disadvantages. Alloy has a smaller weight, reduce unsappressible masses, improve the appearance of the car. Stamped the most cheap, and forged the most durable and at the same time lung.

In addition, it is important that the design of the discs does not prevent them from installing on your car. And it's not in the inconsistency of the technical parameters that can be perfectly approaching your car, and in constructive features disks. There may be a situation where discs may touch brake mechanisms, Standard bolts may not fit into holes, etc. For this reason, before buying, you must make sure whether the discs are suitable for your car model.

Now let's turn to the labeling of the disks that describes technical specifications disks, i.e. The conditions for their applicability.

An example of marking: 6.5 14 4 × 100 ET45 D54.1

Here digit 14. denotes diameter disk In inches and is the main criterion for the preliminary estimate of whether the discs are suitable for your car.

6,5 - this is disc width in inches. In order to correctly assess the necessary width, you need to refer to the operation manual, where the range of supported values \u200b\u200bis specified. The choice within this range is carried out on the basis of which rubber you are going to install on the disk. The rule here is simple - the width of the rubber should not be more than 30 percent more than the width of the disk, and, accordingly, in no case is no less, since in this case the contact stain will not correspond to the normal operating conditions of the tires.

Two digits separated by a multiplication sign (4 × 100) indicate fixing discMore precisely on the number of bolts and the diameter on which they are located. This figure is extremely important, as even with a difference in 1- 2 mm Disks do not sit on the hubs.

The following designation (ET45) indicates wheel departure. Roughly speaking, this is the distance between the hub (or rather the dialing plane of the disk) and the middle of the disk. Departure affects many pendant kinematics parameters, so you need to adhere to the values \u200b\u200brecommended by the manufacturer, not fond of "remote" discs. In this case, controllability suffer greatly.

Latest digits (D54.1) indicate the diameter planting hole (in the center) of the disk. This situation may occur that this value does not match (will be greater) the value specified in the vehicle manufacturer specification. The fact is that many manufacturers cast drives Use for centering on the hub transition rings, making a larger diameter hole. There is nothing terrible in this.

It should be noted that all the technical parameters of the disks are standardized for all types of discs. Therefore, if you decide to move from stamped discs on cast or with cast into forged, you can safely use the old disk as a sample to select a new one.

During the selection of new wheels for cars, the question often arises, and whether to put the wheels more or less, or in order to improve external view Auto or cheesing shopping tires and discs. But the most important question arises, whether the wheels are suitable for my car and how its characteristics will change. Understand whether the wheels can be suitable on a gas tank cover or a side rack of a car (photo 1). Or found in our directory applicability of disks to cars, your car and watch the tire recommended by the plant. But it often happens that other tires that are not approved by the factory can be installed.

In this case, the main thing is to understand how the speedometer indicators will change, i.e. Machine speed, as the external radius of the wheel changes. The cylinder will also be changed ( ground clearance). It is not recommended to go beyond the values \u200b\u200bof factory tires by more than 2-3%. Perhaps the indicators of the controllability and behavior of the car, the consumption of gasoline and the real speed of the car can be changed.

Tire Calculator - Size Comparison

Our tire calculator will show a visual difference in diameter, profile, radius, cliented and tire width. Dotted lines displayed difference in size. In the upper part, you can see the visual representation of the old tire (the original size), and the new tire is visualized at the bottom. Just as you noticed, the tire can be seen in the side and frontal projection. You can copy the page address and show it to other people and they will see the same comparison as you leave.

But how to understand all these values \u200b\u200band difference in%? For this, we created a bus calculator, it will help to understand the change in all the necessary characteristics and will show the difference in% between the old and new bus and even visually displays how the wheel of the old and new size will look. You can just enter the width of the tire, profile and radius of the beam. They are usually displayed in this form - 195 \\ 65 R15 (photo 2).

How to use the online tire calculator?

Use our online tire calculator is very simple. In the upper left corner of the site, there are fields for choosing a tire size. In the top row you need to specify the dimension of your original factory tire (or tires that are now installed on your machine). These values \u200b\u200bare written on the tire profile (side surface). In the first list you need to choose the width of the tire - it is indicated in the milieters. The second list is the percentage of the profile height to the bus width. The third list is the diameter of the disk in inches (usually referred to as the radius).

In the bottom row you need to specify the size of new tires. Tires you are going to install on a car or have already bought. After that, click "Calculate". Our busket calculator will calculate the differences between the old and new bus and display them in the table and in the picture. Namely: the diameter, width, the length of the circle, the height of the tire profile, the number of revolutions per kilometer and changing the clearance of the car. In the first columns of the table, the parameters for old and new tires will be shown, in the following columns, the difference in mm and percentage difference Between them.

At the bottom of the tire calculator there is a speedometer for visual comparison The speed of the old and new tire. Under the speedometer, you can add and reduce speed and see the changes in the speed difference on the old and new tire.

Be careful!

Be careful on the road and follow the manufacturer's manufacturer's recommendations. The reverse side of the installation is not standard tire sizes, it is a risk of losing insurance for an accident, not the passage of state-owned inspection of the car, since the set of tires that are not approved by the plant is considered a change in the construction of the trial consumption.

Car tires are an indispensable components of any car. They are able to ensure safety on the road, as well as the implementation technical characteristicswho were originally declared by the manufacturer. Every year drivers need to change summer tires for winter and vice versa. It is recommended to select tires with the sizes that were provided by the automotive company for a particular autocar model.
Today on automotive market A wide range of tires that are available different manufacturers. Among themselves, they differ not only by manufacturing materials and design, but also sizes. Each car model has its own type of tires that are optimally combined with each other.
The sizes of the tire are implied, as a rule, three parameters are height (distance between the inner wheel disk Both the ground), the width of the tread and the diameter of the inner hole (which is placed in the disk). It is worth noting that the manufacturer when determining dimensions automotive tires It takes into account their mass, craving, power, width and purpose of use. If you even make a minor deviation of the sizes of the tires from the standard, it can lead to a variety of changes, both positive and negative. For example, such as comfort during a trip along the highway or dirt road, readings on the speedometer, fuel consumption and much more. It is for these reasons to change the factory sizes of the tires, it is necessary to approach with special attention, because the consequences can be unpredictable.

What is a visual tire calculator, and why is it needed?

Now it is easy to determine the size of the automotive tires sufficiently. Just need to use a visual tire calculator. With it, the driver will be able to provide all the nuances to avoid trouble in the future. Also, the calculator will allow you to figure out a few options to make the subsequent purchase correctly. This application shows results in online mode, so you can get the result in seconds. Also, the tire calculator will give the maximum accurate answer, taking into account the readings of the speedometer, fuel consumption, noise, conditions on the roads, etc. The driver, first of all, needs to be focused on the manufacturer's recommendation, and select tires depending on the car model, as well as factory and recommended sizes .

Determine the size of the tires through the bus calculator

1. Select the size of the disk or tires that will appear from the drop-down list.
2. Take a look at the tablet below, where are indicated possible options Replacement.
3. From the drop-down list, you need to specify the size of the disk or tires for the replacement option.
4. A visual tire calculator in the online mode will calculate, and will give the user the basic recommendations on the parameters that were specified.

It is worth noting that sometimes the bus calculator offers not always existing replacement options, so you can always get advice from the online manager, which will answer all the questions.
Thus, the tire calculator will help correctly calculate the sizes automotive tire For its replacement. If the driver decided to change the factory settings, this service will provide important recommendations regarding the change of tire characteristics.
A visual tire calculator will help perform all tasks in seconds. The service is available at any time of the day. You can use the calculator not only through a personal computer, but also through laptops, tablets and smartphones.