Replacing the tire profile height. Tire calculator. Old tire size

You may need such a calculator if you want to install, instead of standard tires or disks, their analogs, but of a different standard size. With its help, you can visually represent dimensional changes and only then interpret them for a specific car. At the same time, the calculator is not a tool for selecting tires and wheels, since it does not contain a database of manufacturers.

When replacing disks and tires, taking into account the geometric data obtained from tire calculator, it will not be superfluous to make several measurements yourself. First, the distance from the suspension to the inner surface of the wheel, and also from the shock absorber cup to the tread surface. Secondly, from the wing, as well as the steering rods to the tread surface. At the same time, the geometric parameters of the new wheel assembly should not greatly exceed the size of standard tires and disks. Otherwise, unstable behavior of the vehicle may occur.

A few basic rules to remember when changing tires and wheels.

  1. The tread of summer tires has a standard depth of 0.8-1 cm;
  2. When installing discs with a larger diameter than the standard ones, it is necessary to reduce the overhang value - for every inch of the height of 3 mm overhang;
  3. It is not uncommon for the hub bores on discs that are not original to have a larger diameter. Therefore, when installing them, you need to use special rings for fixing;
  4. In the event that the hole on the disc is smaller than the hub mounts, it is strictly forbidden to drill them out, as well as grind the hub itself;
  5. Correct selection of non-original disks using a calculator will allow you to preserve the driving characteristics of the car;
  6. If you are not sure about the compatibility of tires or wheels with your car, it is better not to install, or contact specialists for help.

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

Tire calculator functionality

The tire selection calculator will be able to help with the selection of tires suitable for a particular car in terms of size and characteristics. The owners of the transport resort to the services of the service when it is time to replace the tires and disks with the vehicle. In order not to waste time on meaningless "changing shoes", checks, use the proposed online service. Bus calculator features:

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

The tire calculator was designed to speed up the selection of tires, making the procedure many times easier. Since every car owner faced the difficulties of choosing, online calculators quickly gained popularity among users.

How to use a tire calculator

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

  1. 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.
  2. A special table with the calculation results will appear in front of the user. From these data it will be possible to find out which tires are needed for a particular transport.
  3. After selecting tires, you can proceed to calculating the size of the disks. Here you will need to specify the exact data - the maximum / minimum width of the disk installed on the car. The service will perform all calculations automatically.
  4. If you need to convert inches to millimeters, you can use an online converter. This action will allow you to find analogs 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 database of the online service.

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 the 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.

Some car owners eventually decide to supply discs with a larger diameter than originally envisaged at the factory. On the one hand, the car is being transformed, but behind the aesthetic beauty there is a technical error in the speedometer readings, which many either do not know about, or simply do not take it into account. This is, of course, everyone's choice, but you must admit that an unpleasant situation may arise when you drive your car, adhere to the speed limit, and the traffic police inspector who stopped you claims that you were driving with excess. Whom to believe, inspector or speedometer? Let's figure it out ...

The situation here can be twofold. If the installed standard size of tires and rims corresponds to the factory standards (approved by the manufacturer), then there should be no problems with the speedometer readings (if, of course, it is serviceable). But if the dimensions differ from those recommended by the manufacturer, then the inspector may be right.

Ideally, after installing non-standard tires or wheels, or both, on the car at the same time, you need to calibrate the speedometer. By default, manufacturers calibrate speedometers for those standard sizes that are indicated on the car body in the doorway from the driver's side, but if the sizes differ, then the speedometer begins to show not entirely reliable data.

The other day I came across a very interesting little program. The calculator of the error of the speedometer when changing tires and disks is an auxiliary tool for making the correct replacement of the disks and tires installed on the car. If you want to change the tire sizes or put wheels of a different radius, this program will help you find out how the external indicators will change, calculate the speedometer error, and show the changes in the vehicle's ground clearance (clearance).

185/60 / R14- factory values ​​of rubber for civilian versions of the 6th generation sivok;
195/55 / ​​R15- factory values ​​of rubber for the generation.

Calculator for speedometer error when changing tires

  • 103,1
  • 113,4
  • 123,7
  • 144,4
  • 154,7
  • 175,3
  • 185,6
  • 195,9

New tire size:
145 155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 305 315 325/30 35 40 45 50 55 60 65 70 75 80 85 R 12 13 14 15 16 17 18 19 20 22

Attention! Manufacturers and many car services do not recommend installing wide tires on the car during the winter season - this is due to the deterioration of the car's braking qualities.

Another useful tool is a rim width calculator. when changing the tire parameters, it is very important to check the compatibility of the wheel width of the vehicle mounted on the vehicle. In the worst case, you simply will not be able to pull the rubber onto the rim. This small calculator will help you calculate the minimum and maximum wheel widths suitable for the selected tire size.

Calculation of the width of the car rim


145 155 165 175 185 195 205 215 225 235 245 255 265 275 285 295 305 315 325/30 35 40 45 50 55 60 65 70 75 80 85 R 12 13 14 15 16 17 18 19 20 22

Operating with these two calculators, you can easily determine the standard size of car tires or choose new rims for the required tire size.

Perhaps, for today this is all that I wanted to show and tell you.

Attention # 2! The calculator for calculating the error of the speedometer and comparing tire sizes is provided for informational purposes only and does not guarantee 100% correct data. Contact a tire specialist for advice !!!

Thank you for your attention and interest in the project.

To be continued...

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Car tires are irreplaceable components of any car. They are able to ensure safety on the road, as well as the implementation of the technical characteristics that were originally declared by the manufacturer. Every year, drivers need to change summer tires to winter tires and vice versa. It is recommended to select tires with the dimensions that were provided by the car company for this or that car model.
Today, the automotive market offers a wide range of tires, which are produced by different manufacturers. They differ from each other not only in materials of manufacture and design, but also in size. Each car model has its own type of tires, which are optimally combined with each other.
Tire dimensions mean, as a rule, three parameters - this is the height (the distance between the inner rim and the ground), the width of the tread and the diameter of the inner hole (in which the rim is placed). It should be noted that the manufacturer, when determining the size of car tires, takes into account their mass, traction, power, width and purpose of use. Allowing even a slight deviation in tire dimensions from the standard can lead to a number of changes, both positive and negative. For example, such as comfort while driving on the highway or dirt road, readings on the speedometer, fuel consumption and much more. It is for these reasons that changing the factory size of tires must be approached with special attention, because the consequences can be unpredictable.

What is a visual tire calculator and what is it for?

Now it is quite easy to correctly determine the size of car tires. You just need to use a visual tire calculator. With its help, the driver will be able to foresee all the nuances in order to avoid troubles in the future. Also, the calculator will allow you to calculate several options in advance in order to make the next purchase correctly. This application shows the results online, so you can get the result in a matter of seconds. Also, the tire calculator will give the most accurate answer, taking into account the speedometer readings, fuel consumption, noise, road conditions, etc. The driver, first of all, needs to be guided by the manufacturer's recommendations and select tires depending on the car model, as well as factory and recommended sizes ...

Determine tire sizes using a tire calculator

  1. Select the rim or tire sizes that will appear from the dropdown list.
  2. Take a look at the plate below for possible replacement options.
  3. From the drop-down list, you need to specify the dimensions of the wheel or tire for the replacement option.
  4. The online visual tire calculator will perform the calculation and give the user basic recommendations on the parameters that have been specified.

It is worth noting that sometimes the tire calculator does not always offer existing replacement options, so you can always get an online consultation from the manager who will answer all your questions.
Thus, the tire calculator will help to correctly calculate the size of the car tire for its replacement. If the driver decides to change the factory parameters, then this service will provide important recommendations for changing the characteristics of the tires.
The visual tire calculator will help you complete all tasks in seconds. The service is available at any time of the day. The calculator can be used not only through a personal computer, but also through laptops, tablets and smartphones.

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 you install tires with a different standard size on your car. The calculator calculates all tire sizes in millimeters, and the vehicle speed in km / h.
And also the calculator will help to 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 only install the factory tire sizes that are specified in the operating instructions for your machine. 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 the comfort also deteriorates (the car will become noticeably stiffer).

With an excessive increase in the profile of the tire, the machine becomes a "roll", it is less controllable, and at critical values ​​of 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.