Calculation of the height of the wheel of the car. Tire marking

26.11.2020

Visual tire and disk online calculator

tire and rim selection table

Choosing the right tires and rims for your car

As the wise proverb says, “Measure seven times and cut once.” Therefore, when deciding to replace the tires and wheels on your car, first select the dimension that is suitable specifically for your car. And the tire selection calculator is best suited for these purposes - an online service for car owners, created just to simplify and speed up the selection of tires and wheels.

Since everyone who decides to abandon standard-sized wheels faces a similar task, and not everyone knows how to choose the right tire size, the tire disk calculator has taken a well-deserved place in the list of useful services for car owners on our website. Use the tire and rim size calculator to help you make the right choice.

Online tire and wheel calculator

The proposed tire and rim calculator has obvious advantages that its users have appreciated in practice, many of them believe that this is the best tire calculator on the Runet.

Clearness of calculations

The visual calculator of tires and wheels contains a schematic image of a car wheel, which immediately displays the values specified in the calculator, which allows you to visually see the changes in the dimensions of the wheel when changing its parameters.

Auto tire calculator will quickly select possible sizes

The online tire calculator allows you to select tires by size for any passenger car in a few clicks. A quick and easy calculator for selecting tuning wheels for non-standard tire sizes. In a matter of minutes, you can determine the maximum or optimal dimensions of the disc radius, its offset, as well as the width and height of the tire profile.

You can choose tires for almost any car

First of all, the service is conceived as a calculator for selecting tires and rims for passenger cars, however, the ability to make calculations for wheels with a rim diameter of up to 20 inches allows, in suitable cases, to use this online program for those who need a truck tire calculator (tire calculator for truck tires). tires).

Selection of wheels by tire size and selection of tires by wheel parameters

The online tire and rim selection program allows you to select rims for tires and determine the appropriate tire size for your car.

Wheel tire calculator works online

The online tire calculator does not need to be downloaded and installed, the service is always available online. The convenience of the online service lies in the fact that it allows you to use the possibility of selecting tires and rims in real time and without registration. Access to the tire calculator is possible from any device with Internet access.

How to use the tire disk calculator

The visual tire calculator offers a comparison of tires of different sizes. Using the calculator is very easy. As you can see, the bus disk calculator is divided into two parts. The upper area of the calculator includes fields for selecting tire and wheel parameters, as well as a graphical representation of the wheel, where changes are displayed on the fly, once all dimensions are determined. And the lower area, which offers a complete table of sizes for wheels of different diameters with tires of various widths and profiles that could fit the dimensions you specified recommended by your car manufacturer. The presented dimensional table of possible tires and disks allows you to quickly obtain information about the dimensions suitable for the car.

The main problem that the tire-disk calculator solves is that it allows you to choose a “cheap” tire size. For those who are not in the know, there are expensive tire sizes and cheap ones, but cheap not because the tires are bad or a ten-year release date, but because the sizes are not popular with manufacturers, although changes from the size recommended by the manufacturer will be very small. Using the calculator, you can quickly determine the most inexpensive tire size for your car, after which it will be easier to decide on the manufacturer.

If with summer tires inexpensive options can be found in any dimension, since a pattern has not been identified, then with regard to winter tires everything is more or less obvious. If you add 5% of the profile height from the original size to the tire size recommended by the manufacturer of your car for search. Then for the same manufacturer of car tires, the difference in the sale price can be up to 30%. The calculation formula is simple, the higher the profile of the wheel (within reasonable limits), the cheaper it can cost.

Virtual tire calculator for rims and tires will help you make the right choice!

Service users do not need to make complex independent calculations of the difference in allowable tire sizes and wheel offsets, the disk-tire calculator provides a detailed comparison table between the recommended size and the desired size, based on which you can easily make your choice.

In addition to the visual tire calculator, our website contains other online services useful for car owners.

Tires of American and European production differ in marking. Often a situation arises when it is necessary to convert inches to centimeters. In this article, we will describe how to decipher tire sizes in centimeters.

Metric tire marking

The main dimensions of tires are prescribed by marking, these include:

Tire profile width - the distance, expressed in millimeters or inches, between the outer sides of the sidewalls of an inflated tire, excluding elevations, trim or belts. The specified value should not exceed the product rim width by more than 30%.
Tire series. Specifies the ratio of the width and height of the product profile. Allows you to distinguish rubber in this way:

low profile - series less than 70%;
high profile - in the range of 70-82%;
full profile - more than 85%.

Tire construction. There are radial and diagonal tires. In the first case, the fibers of the cord layer are placed perpendicular to the circumference of the wheel. In the second variant, the cord threads are overlapped. Radial tire design is more common, such tires provide better grip on the road surface, they are more reliable in operation.
wheel radius.

How to understand what tire markings mean? The designations on the side of automobile rubber are applied by tire manufacturers. Factory marking is in metric or inch system. For example, the size of tires marked with the metric system 265/75 R15 corresponds to the designation of the inch system 31 × 10.5 R15. The interpretation of these designations in centimeters means:

The designation 265/75 R15 indicates the dimensions of the tire:

265 - a figure that determines the width of the tire (one centimeter is equal to ten millimeters, 265 mm = 26.5 cm);
75 is the percentage (75%) that determines the relationship between the height of the tire profile and the width of the rubber (265 * 0.75 \u003d 198.8 mm or 19.9 cm), the number found indicates the height of the tire profile;
R - denotes the radial type of tires;
15 - wheel diameter, the size is indicated in inches, you can convert the indicated parameter into centimeters by multiplying the digital value of interest by 2.54, since 1 inch is 2.54 cm, as a result we get 15 * 2.54 \u003d 38.1.

The designation 31 × 10.5 R15 stands for:

31 - wheel height (31 inches or 31 * 2.54 = 78.7 cm);
10.5 - tire width (10.5 inches or 10.5 * 2.54 \u003d 26.7 cm);
R - indicates the radial type of tires;
15 - determines the diameter of the wheel (15 inches or 15 * 2.54 = 38.1 cm).

subtract its radius from the total height of the tire (78.7-38.1 \u003d 40.6 cm);
divide the resulting value by 2 (40.6 / 2 \u003d 20.3 cm).

Differences in the marking of tires

Tire marking with inch system

When deciphering tire sizes, pay attention to the letter in front of the tire dimensions:

"P" - indicates the "P-metric" system used for minivans, light pickups (with a carrying capacity of up to 0.5 tons). This system is very convenient, it is often used by tire manufacturers.
"T" - "spare" tires are marked with the indicated letter: rubber can be used until the main tire is repaired or replaced.
"LT" stands for "Light Truck-metric" system, designed for trucks and vehicles capable of transporting large loads. Vehicles with a load capacity of up to 1 ton fall into this category.
"ST" - indicates "Special Trailer Service", products are designed for trailers, they can also be used to transport boats or cars.

Letter values can be at the end of the tire marking, in which case they mean:

"LT" - the tire refers to products with early marking:

"Numeric" - numerical, tires are designed for vehicles transporting heavy loads, trailers
"Wide Base" - tires with a wide base, manufacturers make such products with a rim diameter of 16.5 inches;
"Flotation" - flotation, large-sized tires that allow the car to move on a sandy surface or mud.

"C" is a commercial tire used for vans and distribution vehicles capable of transporting large loads.

If at the beginning of the marking there is no letter designation and a three-digit number, for example, 45R15, then this is a tire with a metric size of the Euro-metric system applicable on tires of European manufacturers. The indicated dimension corresponds to the decoding according to the P-metric system, but differs in smaller loads.

235 - product width (235 mm = 23.5 cm);
710 - a figure indicating the outer diameter of the tire (710 mm \u003d 71.0 cm);
460 - tire rim diameter (460 mm = 46 cm);
A - the designation of asymmetric rubber sides, for example, 460A means that the outer side has a diameter of 45 cm, and the inner one is 47 cm.

Such non-standard markings are designed for vehicles with wheels of a specific size that differ in side profiles from standard metric or inch products. Faced with non-standard markings, it is better to find out their decoding from the tire manufacturer.

Comparison of calculated data

Dimensions requested by the tire calculator to perform calculations

Independent decoding of tire sizes requires a certain accuracy of calculations. You can check whether the conversion of values \u200b\u200bfrom centimeters to inches and vice versa is done correctly using tire calculators. With their help, you can also find out how many tire sizes are suitable for a particular car model.

Tire calculators are easy to find on the Internet, they usually have American and European systems of sizes at the same time. Therefore, by entering the tire sizes recommended by the car manufacturer in the metric system, it is possible to get a list of American and European tires. It is very convenient, if necessary, to select the brand of rubber of interest, as well as view the possibility of changing tire sizes recommended by the manufacturer. When using tire calculators, it is necessary to take into account the error arising from rounding, so it is better to translate the dimensions of interest manually, then compare them with the options calculated by the Internet resource.

Conclusion

The American marking of rubber, if you do not take into account the inches that are unusual for us, is very convenient to use. But in most situations, you have to deal with the metric notation. Converting inch dimensions to centimeters is not difficult if you understand the decoding of the designations applied by manufacturers to the side surface of tires. In this case, it is necessary to take into account the error of calculations, which may arise due to inattention or rounding of the obtained values. To correctly calculate the dimensions, it is better to use the manual method, then compare the obtained parameters with the data of tire calculators. We do not recommend using only one method, since there is also a certain rounding error in the embedded electronic computing programs.

Car owners use a tire calculator to select tires and rims of the right size. All calculations are done online. The user does not have to deal with lengthy, incomprehensible calculations. The application is multifunctional, since the motorist will be able to understand how to change the dimensions of the wheel, taking into account changes in the size of tires and wheels. Consider the features of using the service.

Tire calculator functionality

To help with the selection of tires suitable for a particular car in terms of size and characteristics, the tire selection calculator can. Vehicle owners resort to the services of the service when it is time to replace the tires and wheels on the vehicle. In order not to waste time on meaningless "changing shoes", checks, use the proposed online service. Tire calculator features:

you can calculate the size of tires;
the service provides different parameters - wheel diameters, changes in the height of the clearance between the road and the car (clearance), track expansion;
help in converting inches to millimeters or vice versa, using the American and European size charts.

The tire calculator has been designed to speed up the selection of tires, making the procedure much easier. Since every owner of a car faced the difficulties of choosing, online calculators very quickly gained popularity among users.

How to use the tire calculator

There are several tips to help you use the tire size calculator for its intended purpose. The step-by-step instruction consists of the following steps:

In the form you will need to enter the size of the tires installed on the car, as well as those that you would like to install.
The user will see a special table with the results of calculations. From this data, it will be possible to find out which tires are needed for a particular vehicle.
After selecting tires, you can proceed 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 will be performed automatically.
If you need to convert inches to millimeters, you can use the online converter. This action will allow you to find analogues with American sizes and with European ones. Comparison through the tire calculator will be as accurate as possible, since all the necessary information has been entered into the online service database.

The general selection procedure is very simple, but the owner of the car will definitely need to enter the initial data. The parameters should be as accurate as possible so that there are no errors or inaccuracies in subsequent results.

You can use this service on our website. The program is freely available, anyone can make calculations in a few minutes. To simplify the process of use, it is worth using the instructions given.

Using the tire calculator, you can easily calculate how the outer dimensions of the wheel, ride height (clearance), speedometer readings and other characteristics will change when you install tires with a different size on your car. The calculator calculates all tire sizes in millimeters, and the vehicle speed in km / h.
Also, the calculator will help you calculate the required rim width for a specific tire size.

How to use the tire calculator:

First enter the standard size installed on your car, and then the one you want to install and click "calculate". The table on the right will show the results of the calculator's calculations.
Detailed information about tire marking in the section: tire marking.

We recommend that you install only the factory tire sizes that are listed in the owner's manual for your machine. Installation of non-standard sizes may void your dealer's warranty and may affect vehicle performance and handling.

Tire calculator for European tires

Old size:

new size:

145 155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 305 315 325

/ 25 30 35 40 45 50 55 60 65 70 75 80 85

12 13 14 15 16 17 18 19 20 21 22 23 24

Found in catalogue:

175/70R13-

When recalculating tire sizes on a calculator, it should be borne in mind that:

With an increase in the diameter of the rim (and, as a result, a decrease in the height of the tire profile so that the outer diameter of the wheel remains unchanged), the load on the car suspension increases, as well as comfort worsens (the car will become noticeably stiffer).

With an excessive increase in the tire profile, the car becomes a “roll”, it is worse controlled, and at critical values \u200b\u200bof the profile height, the tire may begin to cling to body parts and suspension of the car, which will subsequently lead to its destruction.

During the selection of new wheels for a car, the question often arises, should I put wheels larger or smaller, or in order to improve the appearance of the car or reduce the cost of buying tires and wheels. But the most important question arises, will the wheels fit my car and how will its characteristics change. You can understand whether the wheels will fit on the gas tank cap or the side stand of the car (photo 1). Or find your car in our directory of applicability of discs to cars, and see the tires recommended by the factory. But it often happens that you can put other tires that are not officially approved by the factory.

In this case, the main thing is to understand how the speedometer will change, i.e. the speed of the machine, as the outer radius of the wheel will change. The clearance (ground clearance) will also change. It is not recommended to go beyond the values of factory tires by more than 2-3%. The handling and behavior of the car, the consumption of gasoline and the actual speed of the car may change.

Tire calculator - size comparison

Our tire calculator will show you visual differences in tire diameter, profile, radius, ground clearance and width. Dashed lines show the difference in size. At the top, you can see a visual representation of the old tire (original size), and at the bottom, a visualization of the new tire. Just as you noticed, the tire can be seen in lateral and frontal projection. You can copy the URL of the page and show it to other people and they will see the same comparison as you see.

But how to understand all these values \u200b\u200band the difference in%? To do this, we created a tire calculator, it will help you understand the change in all the necessary characteristics and show the difference in% between the old and new tires, and even visually display how the wheel of the old and new sizes will look like. You just need to enter the tire width, profile and wheel radius. Usually they are displayed in this form - 195 \ 65 R15 (photo 2).

How to use the online tire calculator?

Using our online tire calculator is very easy. In the upper left corner of the site, there are fields for choosing a tire size. In the top row, you need to indicate the size of your original factory tire (or the tires that are currently installed on your car). These values are written on the tire profile (side surface). In the first list, you need to select the tire width - it is indicated in millimeters. The second list is the percentage of profile height to tire width. The third list is the disc diameter in inches (commonly referred to as the radius).

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

There is a speedometer at the bottom of the tire calculator to visually compare the speed of the old and new tires. Under the speedometer, you can speed up and slow down and see the change in speed difference between the old and new tires.

Be careful!

Be careful on the road and follow the manufacturer's recommendations. The reverse side of installing non-standard tire sizes is the risk of losing insurance in case of an accident, not passing the state technical inspection of the car, since setting tires that are not approved by the factory is considered a change in the design of the vehicle.