To simplify the determination of the tire size, a special tire calculator has been developed that allows the user to dispense with the need to decipher the numerical values \u200b\u200bon the side surfaces of the rubber. With the help of such a calculator, the difference in tire sizes, profile height and other parameters is determined. In addition, such a calculator allows you to receive other related information, for example, on the deviations of the speedometer, changes in ground clearance, and so on.

Purpose of the Visual Bus Calculator

The visual calculator allows every car owner to easily determine the dimension of the tires and the width of the required rims. With its help, it is possible to determine the diameter of the wheels, the error of the speedometers, the increase in the road track and changes in the clearance under the bottom of the car. Using a tire calculator, it is extremely easy to determine the optimal size suitable for a particular car model. The built-in size conversion system allows you to instantly convert values \u200b\u200bfrom inch to meter and back.

It is advisable to use the potential of the calculator in cases when the car owner switches to using tires and wheels that are different from the original size. It allows you to visually determine the main dimensions, and then simulate them for the selected vehicle. In turn, the selection of tires with its help is impossible, since initially it does not provide for division by manufacturer.

Selection and comparison of tires according to the calculator 2.0

If new wheels and tires of a different size are installed based on the data received from the calculator, it is advisable to additionally carry out a number of measurements. It is advisable to determine the distance on the inner side between the wheel and the suspension, as well as from the tread to the shock absorber cup. In addition, you will need to measure the distance between the tread, fender and steering rods.

In turn, when choosing new tires, it is necessary to proceed from the advisability of a slight deviation in the geometric dimensions of the new tires from the previously used ones. The significant size of the dimensions will cause instability in the movement of the car.

Each car is initially created for certain parameters and dimensions. This fully applies to the permissible size of the used disks and rubber. Accordingly, the selected rubber models must be within the established limits. The use of a tire calculator allows you to simplify the selection process as much as possible, depending on a specific vehicle.

Russians have to regularly face the replacement of rubber, primarily seasonal. The simplest solution in this situation is to use rubber of the same size. While maintaining the dimension of the rubber, the wheel will also retain its original dimensions.

In cases where rubber of a different size is selected, it is necessary to select the appropriate disks to obtain a wheel with the required dimensions. At the same time, by changing the typical tire sizes, it is possible to control the driving characteristics of the car, giving additional softness or rigidity. The higher the profile used, the softer the car feels on the road. As the profile decreases, the stiffness increases, and the narrower tires provide more grip on snow-covered surfaces, so they look more advantageous on winter roads.

At the same time, when selecting the dimension of tires and wheels, it is required to adhere to the permissible dimensions. For example, tires that are too wide will touch the wheel arches in motion, rubbing them, and wear intensively on their own. It is worth taking into account the fact that changing the size of the wheels affects the operation of the speedometer, in particular the magnitude of the error.

From the outside, it may seem that the variety of available configurations significantly complicates the calculations, but the bus calculator greatly simplifies the selection process using 3D modeling. The correct selection of tires is not only the necessary safety, but also the optimization of the road capabilities of the car. At the same time, the presence of the metric and inch system of sizes allows you to work with both American and European standard sizes without problems.

With the help of a tire calculator, you can easily calculate how the outer dimensions of the wheel, the height of the ground clearance (clearance), the speedometer readings and other characteristics will change when tires with a different standard size are installed on your car. The calculator calculates all tire sizes in millimeters, and the vehicle speed in km / h.
And 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 that you want to install and click "calculate". The table on the right shows the results of the calculator's calculations.
Detailed information on tire marking in the section: tire marking.

We recommend that you install only the factory tire sizes that are specified in the operating instructions for your machine. The installation of non-standard sizes may void the dealer's warranty, as well as impair the performance and handling of the vehicle.

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 the directory:

175/70 R13 -

175/70 R13 -

When converting tire sizes on a calculator, keep in mind that:

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

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

Tires of American and European production differ in marking. A situation often 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 the tires are prescribed by marking, they include:

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

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

1. Tire construction. Distinguish between radial and bias tires. In the first case, the fibers of the cord layer are located perpendicular to the wheel circumference. In the second version, the cords are overlapped. The radial design of tires is more common, such tires provide better grip of the wheels with the road surface, they are more reliable in operation.
2. Wheel radius.

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

1. The designation 265/75 R15 indicates the dimensions of the tires:

• 265 - a figure that determines the width of the tire (one centimeter is equal to ten millimeters, 265 mm \u003d 26.5 cm);
• 75 is the percentage (75%) that determines the relationship between the tire profile height and the rubber width (265 * 0.75 \u003d 198.8 mm or 19.9 cm), the number found indicates the tire profile height;
• R - denotes a radial tire type;
• 15 - the diameter of the wheel, the size is indicated in inches, you can translate the specified 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.

1. The designation 31 × 10.5 R15 stands for:

• 31 - wheel height (31 inches or 31 * 2.54 \u003d 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 \u003d 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 tire labeling

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

1. "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.
2. "T" - the indicated letter marks "spare" tires: rubber can be used until the main tire is repaired or replaced.
3. "LT" stands for the "Light Truck-metric" system, designed for trucks and vehicles capable of transporting large loads. Cars with a carrying capacity of up to 1 ton fall into this category.
4. "ST" - indicates "Special Trailer Service", products are designed for trailers, they can also transport boats or cars.

Letter values \u200b\u200bcan be at the end of the tire marking, in which case they mean:

1. "LT" - a tire refers to products with early marking:

• "Numeric" - numeric, tires are designed for vehicles transporting heavy loads, trailer trailers
• "Wide Base" - tires with a wide base, manufacturers make such products with a rim diameter of 16.5 inches;
• "Flotation" - flotation, large-size tires, allowing the machine to move on a sandy surface or mud.

1. "C" - commercial tires for vans and delivery 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 to tires of European manufacturers. The indicated dimension corresponds to the decoding according to the "P-metric" system, but differs in lower loads.

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

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

Comparison of calculated data

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

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

Conclusion

American rubber markings, apart from the unusual inches we are used to, are very convenient to use. But in most situations, you have to deal with the metric designation system. It is not difficult to convert inch sizes to centimeters if you understand the decoding of the designations applied by the 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. In order 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 the embedded electronic computing programs also have a certain rounding error.

When choosing car tires, it is important to remember that matching the dimension of the tire to the dimension of the disks is of great importance. With the diameter, everything is clear - a 15 '' tire must be put on a 15 '' disc. Confusion usually arises with the width of the tire and rim. Their discrepancy can lead to a number of completely undesirable consequences associated with the operation of tires. The contact patch may become irregular, tire wear may increase, and the handling and driving performance of the car may deteriorate. In order not to be mistaken with the choice, use the correspondence table.

You can also do the calculation yourself. To do this, consider an example for a tire 215 mm wide and 16 in diameter.

1) We translate the width of the rubber in cm: 215 mm \u003d 21.5 cm

2) We translate the resulting value into inches: 1 cm \u003d 2.54 inches, divide 21.5 by 2.54, we get 8, 46 - round up to 8.5

3) From the obtained value we take 25-30%, in our case: 2.38

4) Subtract the resulting number from the width of the tire and round to tenths 8.5 - 2.38 \u003d 6.1

5) The rim width of the disc must be 6.1 inches or 155 mm.

For discs with a diameter of up to 14 "inclusive, an error of 0.5 to 1" is possible.

For discs with a diameter of 15 "inclusive, the allowable error is 1.5".

As a calculation, it is better to calculate the allowable range of values, namely, calculate 25% and 30%, where 25% will be the maximum, and 30% will be the minimum width of the disc rim.

Correspondence table for tires and wheels for passenger cars

Visual tire and disk online calculator

selection table for tires and rims

Correct selection of tires and wheels for the car

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

Since everyone who has decided to abandon standard-size wheels faces a similar task, and not everyone knows how to choose the right tire size, the tire disk calculator has taken its 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 offered tire and wheel calculator has obvious advantages that its users have appreciated in practice, many of them believe that this is the best tire calculator on the Russian Internet.

Visibility of calculations

The visual tire and wheel calculator contains a schematic image of a car wheel, which immediately displays the values \u200b\u200bindicated in the calculator, which allows you to visually see changes in the dimensions of a wheel when changing its parameters.

Car 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. Fast and convenient calculator for the selection of tuning wheels for non-standard tires. 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 find tires for almost any car

First of all, the service is conceived as a calculator for the selection of tires and wheels for passenger cars, however, the ability to make calculations for wheels with a rim diameter of up to 20 inches allows, if appropriate, this online program can be used for those who need a truck tire calculator (tire calculator for trucks tires).

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

The online tire and rim selection program allows you to select rims to 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 possibilities of selecting tires and rims in real time and without registration. The bus calculator can be accessed from any device with Internet access.

How to use tire disk calculator

The visual tire calculator offers a comparison of tires of different sizes. The calculator is very easy to use. As you can see, the shino disk calculator is divided into two parts. The upper area of \u200b\u200bthe calculator includes fields for selecting tire and rim parameters, as well as a graphical representation of the wheel, where changes are displayed on the fly as soon as all dimensions are determined. And the lower area, which offers a complete table of rim sizes of different diameters with tires of different widths and profiles, which would suit your given dimension recommended by your car manufacturer. The presented size chart of possible tires and wheels allows you to quickly get information about the dimensions suitable for the car.

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

If with summer tires inexpensive options can be found in any dimension, since the 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 dimension recommended by the manufacturer of your car. At one and the same manufacturer of car tires, the difference in sales value 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.

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

The users of the service do not need to make complex independent calculations of the difference in the permissible tire sizes and wheel spacing, the disco-tire calculator provides a detailed comparison table between the recommended and desired sizes, based on which you can easily make your choice.

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