Comparison of wheel drives in size. Tire Calculator for Tire Selection. Proper selection of tires and discs for the car

Do you want to choose a bus for your car, but do not understand the tire marking? It's not a problem! In this section, we will help you figure out: what are the tire parameters that they mean, and which tire is suitable for your car.

Decoding tire marking.

195/65 R15 91 T XL

195 - This is the width of the tire in mm.

65 - proportionality, i.e. Profile height ratio to width. In our case, it is equal to 65%. Simply put, with the same width, the more this indicator, the tire will be higher and vice versa. Usually this magnitude is called simply - "profile".

As the tire profile is a relative value, then it is important to take into account when selecting rubber, that if you instead of the size of 195/65 R15, you want to put tires with a size of 205/65 R15, then not only the width of the tire will increase, but also the height! That in most cases is unacceptable! (except in cases where both of these sizes are listed in the auto operating book). The exact data on the change in the external sizes of the wheel you can calculate in a special bus calculator.

If this ratio is not indicated (for example, 185 / R14C), it means it is equal to 80-82% and the tire is called full-face. Reinforced tires with such labeling are usually used on minibuses and light trucks, where a large maximum load on the wheel is very important.

R. - means tire with radial cord (in fact, now almost all tires are made this way).

Many mistakenly believe that R- means the tire radius, but it is the radial design of the tire. There is still a diagonal design (denoted by the letter D), but in recent times it is practically not released because it performance features noticeably worse.

15 - wheel diameter (disk) in inches. (It is diameter, not a radius! This is also a common error). This "planting" tire diameter on the disk, i.e. This is an internal size of the tire or an outdoor disk.

91 - Load index. This is the level of maximum permissible load on one wheel. For passenger cars It is usually done with a margin and when choosing a tire is not a decisive value, (in our case, in - 91 - 670 kg.). For minibuses and small trucks, this parameter is very important and must be observed.

Tire Load Index Table:

T. - Tire speed index. What he is more, with the greater speed you can ride on this tire, (in our case, IS - N - up to 210 km / h). Speaking about the tire speed index, I would like to note that this parameter manufacturer of tires guarantees the normal operation of rubber at a constant movement of the machine at the specified speed for several hours.

Speed \u200b\u200bIndex Table:

American tire marking:

There are two different marks of American tires. The first is very similar to the European, only before the size of the letters "P" (Passanger - for passenger car) or "LT" (Light Truck - light truck). For example: P 195/60 R 14 or LT 235/75 R15. And other tire marking, which is fundamentally different from European.

For example: 31x10.5 R15 (corresponds to the European Size 2) 265/75 R15)

31 - External tire diameter in inches.
10.5 - Tire width in inches.
R. - The tire of the radial design (the older models of the tires were with a diagonal design).
15 - the inner diameter of the tire in inches.

Generally speaking, if you do not consider inconsistent in. And then everything is simple with decoding: the first digit size is the outer diameter, the second is the width, the third is the inner diameter.

Additional information indicated in the marking on the sidewall bus:

XL or Extra Load - stressed tire, the load index of which is 3 units higher than that of the usual tires of the same size. In other words, if the load index 91 is specified on this tire with an XL or Extra Load mark, then this means that with this index, the bus is capable of withstanding the maximum load of 670 kg instead of 615 kg (watching the tire load index table).

M + S. Or M & S Tire Marking (Mud + Snow) - Mud Plus Snow And Means Tires All-season or Winter. On many summer Tires For SUVs, M & S is indicated. However, these tires cannot be operated in winter timebecause winter tires They have a completely different composition of rubber and tread pattern, and the M & S icon indicates good tire patency.

All season or as all-season tires. AW (Any Weather) - any weather.

Pictogram * (Snowflake) - Rubber is intended for use in harsh winter conditions. If there is no tire on the sidewall this label, then this tire is designed for use only in summer conditions.

Aquatred, AquaContact, Rain, Water, Aqua or Pictogram (umbrella) - Special rain tires.

Outside and Inside; Assymmetric tires, i.e. It is important not to confuse which side is outdoor, but what is internal. When installing, OUTSIDE must be from the outside of the car, and Inside - with the inner.

RSC. (Runflat System Component) - Runflat tires are tires on which you can continue moving by car at a speed of no more than 80 km / h with full pressure drop in the tire (when crossing or cut). On these tires, depending on the manufacturer's recommendations, you can drive from 50 to 150 km. Different manufacturers Tires use different designations of RSC technology. For example: Bridgestone RFT, Continental SSR, Goodyear Runonflat, Nokian Run Flat, Michelin ZP, etc.

Rotation Or the arrow this marking on the sidewall of the tire means the directional tire. When the tire is installed, it is necessary to strictly observe the direction of rotation of the wheel specified by the arrow.

Tubeless - Delicious Tire. In the absence of this inscription, the tire can only be used with the camera. Tube Type - indicates that this tire must only be operated with the camera.

Max Pressure.; The maximum allowable tire pressure. Max Load is the maximum permissible load on each car wheel, kg.

Reinforced. or RF letters in a sizer (for example 195/70 R15RF) mean that this is a reinforced bus (6 layers). The letter C at the end of the size (for example, 195/70 R15C) denotes a cargo tire (8 layers).

Radial This marking on rubber in a sizer means that it is the autoresin of radial design. Steel means that metallic cord is present in the tire design.

Letter E. (In the circle) - the tire corresponds to the European ECE (ECONOMIC COMMISSION FOR EUROPE). DOT (Department of Transportation - US Department of Transportation) - American Quality Standard.

Temperature A, B or C The heat resistance of the autoresine at high speeds on the test stand (and is the best indicator).

TRACTION A, B or C - The ability of the tire to braking on a wet roadway.

Treadwear.; The relative expected mileage mileage compared to the special standard US test.

TWI (Tread Wear Indiration) - Pointers of tire tread wear indicators. Marking on the TWI wheel can also be with an arrow. Indicators are located evenly in eight or six places across the entire circumference of the tire and show the minimum permissible tread depth. The wear indicator is performed as a protrusion with a height of 1.6 mm (the minimum protector for light vehicles) and is located in the deepening of the tread (as a rule, in drainage grooves).

Dot. - Clear address of the manufacturer, bus size code, certificate, release date (week / year).

What is the tire calculator:

With this tire calculator, you can easily calculate how to change: external dimensions Wheels, height road Suit (clearance), speedometer reading and other characteristics, when installing tires with another sizes on your car.

Old tire size

Width

Height

Diameter

New tire size

Width
Choose 5.0 5.5 5.0 6.0 6.5 7.0 7.5 8.5 9.5 10.5 11.5 12.0 12.5 13.0 13.5 14.5 125 135 145 155 165 175 295 195 205 215 275 235 295 355 335 335 335 355 365

Height
Select 25 27 30 31 32 33 35 38 38.5 40 45 50 55 60 65 70 75 80 85 90

Diameter
Select 12 13 14 15 16 16.5 17 17.5 18 19 20 21 22 23 24 25 26 28 30 32

Enter the first size installed on your car, and then the one you want to install.

The difference in speedometer testimony and real speed depends on the velocity of the car, the more speed, the greater the difference

On the website of the online store, the site has a convenient tire calculator, which allows you to easily calculate the changes in the wheel parameters when switching to another tire sizew. With this online tool, you can calculate the external measurements of the wheel, clearance (road lumen height), calculate the speedometer readings and other characteristics.

With the onset of the new season, each responsible car owner considers it necessary to change the rubber in accordance with the time of the year. Optimal option There will be a tire of the size that the automaker recommended for a particular car brand. In cases where this is not possible, deviations are allowed in a diameter in a 2% range.

Replacing rubber requires a serious approach. Selecting new tires and discs, it is necessary to take into account such indicators as:

• tire width,
• profile height
• inner wheel diameter,
• permissible speed indices.

The incorrectly selected tires can cause malfunction of the car, increasing the fuel consumption, deterioration of comfort when driving, as well as cause problems during the vehicle inspection in the traffic police.

How to make tire calculation?

To pick up the tires of the required size, you need to use the tire calculator, with which theoretical dimensions are determined. All measurements are carried out in millimeters, and the speed in km / h. To make a calculation, you should enter your auto tire parameters in the appropriate line. Then enter dimensions new tire And the disk that will be installed. After specifying all the parameters, the table below appears information about changes in the width of the tire and the height of the profile, internal and external diameter, the difference in speeds (real and speedometer indications).

What to pay attention to the selection of tires

• Installation of tires and discs of non-standard size can lead to damage to the tire itself, damage to the disk and reduce the operating characteristics of the car. When choosing rubber, it is better to rely on the recommendation of the automaker.
• If the wheel disk diameter is larger, then in this case, the load on the suspension may increase. To preserve the former diameter of the outer wheel, the profile height indicators should be reduced.
• If you select tires with a highly enlarged profile, you need to be prepared for the loss of quality control by car. The tire can touch the body and suspension, which will lead to rapid wear.
• Even with the most insignificant difference in the speedometer and in reality, the error can grow at times with raising the speed, which makes the ride unsafe.
• Narrow or too wide discs can cause tire deformation. This, in turn, will lead to premature wear and worsening performance.

Choosing new tires on your car, first of all you need to know whether the instances offered by the seller are suitable for the parameters of a particular machine. Make such calculations simply, if you use the free online 3D visual tire Calculator in the Katech online store.

We offer you a wide selection of tires and disks for cars. different marks And the models, and with the help of our best bus calculator you quickly orient and can make the right choice.

How to use a bus calculator in the online store Kamtech?

Make a few simple actions: Select the standard size of your machine, as well as the size of new tires (disks) that you want to purchase. Then click the "Calculate" button. You will see the difference between the tires (discs) and deviations in various indicators: diameter, width, circle length, profile height, and so on.

If visual tire online calculator 3D issued a mismatch of tire parameters and discs on a car brand, a different model should be selected. Installing tires that are not recommended by the manufacturer may result in improper operation of the speedometer, odometer or other electronic systems Machines (for example, avs, Evd and others). Characteristics of the car manageability may also worsen, which is rather dangerous, especially in winter.

If you set the tires with the profile less than the standard, the stiffness will increase, the driving comfort will decrease, the load on the suspension will increase.

In other words, the use of the tire calculator on the car brand is difficult to overestimate. It will save your time on the selection of tires and disks, will not allow to make a mistake in choosing and spend money in vain. Come on Kamathuh.ru - Choose right tires And buy them at a low price.

To simplify the definition of the tire size, a special tire calculator was developed, allowing the user to do without the need to decrypt the digital values \u200b\u200bon the side surfaces of rubber. Using a similar calculator, the difference in tire size, profile height and other parameters are determined. In addition, a similar calculator allows you to receive other related information, for example, by deviations of the speedometer, a change in the magnitude of the road lumen, and so on.

Purpose of the visual tire calculator

A visual calculator allows each car owner to determine the dimension of the tires and the width of the necessary disks. With it, it is possible to determine the diameter of the wheels, the speedometer error, the increase in the road rut and change the lumen under the bottom of the car. Through the tire calculator, it is extremely determined optimal sizesuitable for a specific car model. The built-in sizes conversion system allows you to instantly transform values \u200b\u200bfrom an inch system to meter and back.

It is advisable to use the potential of the calculator in cases where the car owner passes to the use of tires and disks different from the initial size. It allows you to visually identify the main dimensions, then simulate them for the selected car. In turn, the selection of tires is impossible with its help, since initially it does not provide for divisions by manufacturers.

Selection and comparison of tires according to Calculator 2.0

In the case of installing new drives and tires of other size based on data calculator obtained from a calculator, it is advisable to additionally carry out a number of measurements. Determine appropriate distance inner side Between the wheel and the suspension, as well as from the tread to the cup of the shock absorber. In addition, it will take measure the distance between the tread, the wing and steering traction.

In turn, when choosing new tires, it is necessary to proceed from the feasibility of a minor deviation in geometric sizes New tires from used earlier. The significant size of the size will cause instability in the movement of the car.

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

Russians have to regularly encounter the replacement of rubber, primarily seasonal. The easiest solution in such a situation is to use similar to the size of rubber. When saving the dimension of rubber wheel, the wheel will also save its initial dimensions.

In cases where the rubber of a different size is selected, the selection of appropriate disks is required to obtain the wheel with the necessary dimensions. At the same time due to changes model sizes The tires are the ability to control the car driving characteristics, giving additional softness or rigidity. The higher the profile used, the silent the car feels on the road. With a decrease in the profile, rigidity is growing, and the narrow tires give more clutch with a snow-covered surface, so it looks more profitable on winter roads.

At the same time, when selecting the dimension of tires and disks, it is required to adhere to permissible sizes. For example, too wide tires will be in motion to touch wheel arches, swaying them, and intensively wearing independently. It is also worth considering the fact that changing the size of the wheel affects the operation of the speedometer, in particular the magnitude of the error.

From the part it may seem that the variety of available configurations complicates the calculations, but the tire calculator has repeatedly simplifies the selection process using 3D modeling. Proper selection tires, it is not only required securitybut also optimization road opportunities car. At the same time, the presence of a metric and inch size system allows you to work with American, and European sizes without any problems.

With the help of a bus calculator, you can easily calculate how to change: the external dimensions of the wheel, the height of the road lumen (clearance), the speedometer reading and other characteristics, when installing tires with another sizes on your car. All sizes of tire calculator calculates in millimeters, and car speed in km / h.
And also the calculator will help calculate the required disk width for a specific type of tire.

How to use tire calculator:

Enter the first sizes installed on your car, and then the one you want to install and click "Calculate". The table will show the results of calculator calculation.
Detailed tire marking information in the section: Tire marking.

We recommend that you establish only the factory sizes of the tires that are listed in the instruction manual for your machine. Installation of non-standard sizes can lead to the removal of warranty obligations at the dealer, as well as the deterioration of the characteristics and control of the car.

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 a catalog:

175/70 R13 -

175/70 R13 -

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

With increasing diameter wheel Disc, (and, as a result, reducing the height of the tire profile so that the outer diameter of the wheel remains unchanged) increases the load on the car suspension, as well as the comfort will deteriorate (the car becomes noticeably tough).

With an excessive increase in the tire profile, the machine becomes "roll", it is worse than the tire profile height of the tire can begin to cling to the parts of the body and the car suspension, which will later lead to its destruction.