How to find the center hole of the disk. Measurement of disk parameters. What to do if the CO of the structure is larger than the CO of the hub

You can familiarize yourself with the decoding of tire (tire) designations.

The number and bore diameter of the location of the mounting holes of the rim.

6.5J×15 H2 5/112 ET39 d57.1- "five holes on a diameter of 112 mm"

The first digit is the number of bolts (or nuts) = the number of mounting holes in the disk for bolts or nuts (the most common wheels are with the number of mounting holes from 4 to 6, less often they are 3, 8 or 10. In our case, 5.

The second digit is the diameter in mm on which the centers of these holes are located, which is called PCD = Pitch Circle Diameter and in our case it is equal to 112 mm. In the tire industry, chic is often called the term "PCD" both of these parameters at once, and indicating the PCD of the disk they write 5/112. The wheel mounting holes are located at different diameters with a tight positional tolerance in relation to the central hole. There is a limited number of such diameters (examples - 98, 100, 112, 114.3, 120, 130, 139.7 and some others, they are used by automakers either by tradition or as the most suitable for certain types of cars - for example, size 139, 7 is typical for pickups and SUVs). Occasionally there are wheels with two "sets" of 4 or 5 mounting holes located on two different diameters.


3 holes	4 holes	5 holes
To independently determine PCD = diameter "B" in fig. necessary: measure the distance "A" between the centers of adjacent holes and multiply by the coefficients that are shown in the corresponding pictures

Disc center hole, hub diameter.

6.5J×15 H2 5/112 ET39 d57.1- "hub hole 57.1 mm"

d 57.1 - The diameter of the centering hole on the disk. Must exactly match the diameter of the seat cylinder on the hub. Often the same wheel (rim) is offered for cars from different manufacturers, so the central hole in the wheel should be different. Since, in addition to the centering function, the landing cylinder has another, no less important - it partially takes on the load that falls on the mounting bolts (studs). Therefore, if the centering hole of the disk you like is larger than the seating cylinder of the hub, you will have to use special centering rings that can be bought at tire centers or ordered somewhere. The outer and inner dimensions of the centering ring must correspond exactly to the diameters of the hub cylinder and the centering hole of the disc, respectively.

Wheel rim width.

The disk wheel consists of two main parts: the rim and the disk itself. The disk is the central part of the wheel, with which the wheel is attached to the hub of the car with bolts or nuts. The rim is a cylindrical part of a wheel with a special profile, which is located perpendicular to the disk and serves to mount a rubber tire on it.

6.5 J×15 H2 5/112 ET39 d57.1- "landing width of the disk (rim) 6.5 inches"

6.5 - landing (! not overall!) Width of the disc rim in inches (sometimes the width of the disc in the marking is indicated as a fraction 6 1/2). Width is measured not on the outer sides of the disk, from edge to edge, but on the so-called "disk shelf", on which the sidewalls of the tire lie.
The width of the disk and tire must strictly match each other so that the tires, after being installed on the disks, have the optimal shape specified by the manufacturer.

DIMENSIONS: are always given in inches (1 inch = 25.4 mm), except for Michelin designs which will give measurements in millimeters.

ATTENTION: Width and diameter are selected according to the size of the rubber tire. To determine the overall width of the wheel rim, add another 26 mm to the value of the rim width on the marking. that is, the thickness of the outer and inner side flanges. The overall width of the rim must be 12 (plus or minus 4) mm less than the width of the rubber tire profile

Wheel rim diameter.

6.5J×15 H2 5/112 ET39 d57.1- "diameter (size) of the rim 15 inches"

15 - landing (! not overall!) diameter of the wheel rim in inches, which must correspond to the landing diameter of the tire. On passenger cars, wheels with a diameter of 12 to 32 inches are used, the most common diameters are 14-16 inches. 1 inch=25.4mm.

wheel offset. Wheel removal.

6.5J×15 H2 5/112 ET39 d57.1 - "positive wheel offset 39 mm"

ET=39 - Disk offset or offset in mm (this parameter may also be labeled OFFSET and DEPORT). Usually without problems it can be less than the standard by 10 mm and usually depends on the width of the rim. The smaller the overhang, the wider the wheelbase.

Disc offset is the distance between the mating plane of the rim (the plane of which the disc is pressed against the hub) and the middle of the disc width (an imaginary plane passing in the middle of the rim).

To determine the size of the wheel offset, you need to measure the dimension "B" on the inside of the wheel. Divide the "X" dimension in half. Subtract from the "B" dimension X / 2. If the difference is positive, then the overhang is positive; if it is negative, then the overhang is "negative". Or, in other words:

Departure is "positive" if the mating plane does not go beyond the imaginary plane.

Overhang is "negative" if the attachment plane passes through an imaginary plane.

Disc rim flanges, side flanges.

6.5J ×15 H2 5/112 ET39 d57.1 - "J-type rim flange"

J (JJ, JK, K, B, P, D ...) This letter encodes technical information about the edges of the disc rim (design, shape, height). The most common rim types today are J (mostly for 2WD vehicles), and JJ (usually for 4WD). The rim flange affects the installation of rubber, compensating weights, as well as the resistance to tire displacement on the rim in extreme conditions. Obviously, despite the external interchangeability, for example, J and JJ drives, it is still better to choose the parameter recommended by the car manufacturer.

Wheel rim shelves and hampas.

6.5J×15 H2 5/112 ET39 d57.1 - "shelves rims and humps type H2"

H (H2, FH, AH, CH…)- these letters contain information about the design features of the disk rim shelves and protrusions (humps) on them. Humps (Hump) are designed for tubeless tires and ensure the correct installation of the tire on the wheel. Some tires require special disk parameters in this matter, this point needs to be clarified when buying tires. In the general case, a motorist does not need to delve deeply into the essence of these designations.

Other possible designations.

The disk may also contain:

Date of manufacture. Usually a year and a week. For example: 0504 means that the disc was released in the 5th week of 2004.
SAE, ISO, TUV, PCT...- stamp of the controlling body. The marking indicates that the wheels comply with international rules or standards.
MAX LOAD 2000lb- very often there is a designation of the maximum load on the wheel (designated in - kilograms or pounds). This lists a maximum load of 2,000 pounds (908 kg).
MAX PSI 50 COLD- means that the tire should not exceed 50 pounds per square inch (3.5 kgf / sq. cm), the word COLD (cold) means that the pressure should be measured in a cold tire.
Other

Wheel mount. The order of tightening the bolts (nuts). 110 Nm 11 kgm 7/16 inch 80 Nm 8 kgm 1/2 inch 90 Nm 9 kg*m

Rubber wheel for a car. Correspondence of rubber tires or disks for one car model.

The wheel consists of two main parts:

1.Disk- the central part of the wheel, with which the wheel is attached to the hub of the car with bolts or nuts.

2.Rim- a cylindrical part of a wheel of a specific profile, which is located perpendicular to the disk and serves to mount a tire on it.

DIMENSIONS: indicated in inches (1 inch = 2.54 cm).

Marking example: 5J x 13H2 ET 30
5 - wheel rim width in inches
13 - rim diameter in inches
J And H2- design features of the rim profile
ET 30 - departure (from the German word Einpresstiefe - ET) 30 mm.

ATTENTION! The width and diameter are selected according to the tire size. To determine the overall width of the wheel rim, add another 26 mm to the value of the rim width on the marking, i.e. the thickness of the outer and inner side flanges. The overall width of the rim must be 12 ± 4 millimeters less than the width of the tire profile.

Departure of the rim.

wheel offset- this is the size between the mating plane of the wheel disc when installed on the hub of the car and an imaginary plane passing in the middle of the rim.

Departure "positive" if the mating plane does not go beyond the imaginary plane.
Departure "negative" if the mating plane goes beyond the imaginary plane.

To determine the overhang, you need to measure size "B" from the inside of the wheel, split size "X" cut in half, subtract "X"/2 from "B".
If the difference positive, then the departure "positive", If negative, then departure "negative".

Central hole.

The diameter of the central hole, which is measured from the side of the mating plane, must correspond to the diameter of the landing cylinder on the vehicle hub. Precise matching of these dimensions ensures perfect centering of the wheel on the hub. If the diameter of the central hole is larger, then centering is carried out along the conical (or spherical) surfaces in the holes for fastening the wheel disc with bolts or nuts.

Often the same wheel is offered for cars from different manufacturers, so the central hole in the wheel disc must be different. In this case, many wheel companies produce adapter rings that are installed before mounting the wheel on the car in the central hole of the wheel disk. The inner diameter of such a ring corresponds to the connecting size of the mating part on the car and makes it more convenient to mount the wheel, improves its centering.

Mounting hole diameter. (P.C.D.)

P.C.D. (Pitch circle diameter) a very important wheel parameter and the largest number of errors when replacing rims is associated with this parameter. Very often, car owners install discs whose PCD differs from the regular ones by a couple of millimeters. Sometimes out of ignorance, because it is very difficult to distinguish a diameter of 100mm from a diameter of 98mm "by eye". Sometimes hoping that such a slight discrepancy in the parameters does not play a role - after all, all the other parameters are "like a native". In addition, the diameter of the mounting holes themselves has a fairly solid tolerance (plus tolerance), which allows you to ignore a small discrepancy in the PCD.

European and Japanese cars have a more or less limited number of PCD options. In Europe, PCD 98mm is very common. Italians, in particular FIAT, began to use it, we can say that this is one of the indirect signs of the Italian origin of the model. This diameter is for SEAT, Zhiguli, FIAT. Diameters 100 and 108 are also common. Sometimes 110 (some from Opel), 112 (Audi, Mersedes) and 120 (all BMWs from 1991, before that the 3 series had a diameter of 100) is sometimes found. Many SUVs have PCD 139.7 (however disks may differ in other parameters, for example, offset, diameter of the central heating unit, number of holes).

Japanese manufacturers usually use the same PCD as European manufacturers, but also use PCD=114.3mm. The same diameter (114.3) is available for cars manufactured in third world countries under Japanese licenses (as is the case with FIAT).

In the US, things are different. There are no systematized standard series. But there are quite exotic sizes that can be found on one or two models, apparently in order to limit customers' freedom of choice and thus protect them from mistakes. For example Buick Skyhawk 1975-1982. has PCD=101.6 - this is not found anywhere else. On the rest of the Buick PCD 127 or 115, the sizes are also rare, but not as rare.

When replacing discs, the year of manufacture of the car must also be taken into account. It happens that firms, for reasons known to them alone, change the parameters of disks, including P.C.D. For example, the Audi 100 produced before 1990 has 4 holes on PCD 108, and after - 5 holes on PCD 112. Also BMW 3-series - up to 91 g 4 holes on PCD 100, after 5 holes on PCD 120.

The selection of car wheels should be treated with great care and attention! Each disc has several options for installation on a car, each of which must be considered when choosing. Some parameters are fixed, and some can be adjusted within a small range. This article will tell you about all the intricacies of choosing cast and forged wheels.

Disk options

Size A(disc diameter in inches) - bore diameter - the diameter of the annular part of the rim on which the tire rests.

Size B(rim width in inches) - rim fit width - the distance between the inner surfaces of the wheel flanges. Determines the possible profile width of the tire to be installed. A tolerance of 0.5-1 inch in seat width is allowed, however, for low-profile tires, this should be minimal.

HUMP (Hump)(width in inches) - an annular protrusion, serves for additional fixation when mounting the sides of tubeless rubber.

ET(overhang in mm) - offset (removal) of the disk, i.e. a parameter that determines how deep the wheel is recessed into the car arch. Overhang is the distance from the plane of the disc adjacent to the hub of the vehicle to a plane passing through the axial midpoint of the width of the disc rim. For each vehicle, the manufacturer provides a list of acceptable wheel alignment options. This parameter can be changed by +/- 5 mm without harm to the car's suspension. With a large deviation, it is obligatory to try on the disc both on the front and rear axles of the car, since it is possible that the disc will rest against the suspension elements, fender liner or parts of the car's brake system. In addition, the installation of wheels with an overhang that is much smaller than that provided leads to a significant decrease in the vehicle's stability in turns, increased steering sensitivity to road irregularities and uneven braking forces.

PCD- the number of mounting holes and the diameter of the circumference of the centers of these holes. This value must correspond to the regular one, otherwise it is impossible to achieve reliable fixation of the wheel on the vehicle hub. A deviation of even 1-2 mm can lead to misalignment of the wheel and fasteners.

DIA(CO in mm) - the diameter of the central hole of the disc. It must match the diameter of the centering lug on the vehicle hub. Its value may deviate upwards. In this case, adapter centering rings are used to install the wheel.

Disk options can be designated as follows, for example:

6x15 ET45 5x100 D57.1

6 - wheel width in inches;

15 - disc diameter in inches

ET45- departure (removal) of the disk (in mm);

5x100 - PCD, the number of mounting holes on a certain location diameter. It must be taken into account that for each machine it (diameter) is different and cannot be changed under any circumstances;

D57.1 - DIA (CH)

or like this:

6.5 J 15 H2 5x114.3 ET45 D54.1

6.5 - wheel width in inches;

15 - disc diameter in inches;

5x114.3 - PCD, the number of mounting holes on a certain location diameter.;

ET45- departure (removal) of the disk (in mm);

D54.1 - DIA (CH) diameter of the central hole of the disc, measured in mm;

J And H2- symbols more needed by specialists. IN J information about the design of the side flanges of the rim is encrypted (may be JJ, JK, K or L). A H2- this is the design code for humps, annular protrusions on the landing shelves of the rim, which serve to securely hold the tubeless tire on the rim (there are many variations: H, FH, AH, etc.);

GENERAL INFORMATION

Cars in the basic configuration, as a rule, are equipped with stamped steel wheels and road tires. The main properties of such (usually summer) tires do not allow their use at low temperatures. Seasonal rearrangements of summer and winter tires on the same rim not only require certain costs, but can also lead to various damages. Therefore, more and more car owners are striving to have a separate set of complete wheels with the appropriate tires for every season.
A wheel (commonly a disk) is a rotating and load-transmitting element of a vehicle located between the hub and the tire. Modern wheels, as a rule, include two main parts:
rim, forming an annular surface with beads, on which the tire is mounted;
disk, which is a rim support and equipped with a central hole for installation on one of the car hubs (in some cases, the disk and rim are connected using spokes).

The wheels of passenger cars in most cases are non-separable and differ in design, size of tires used, materials from which they are made, and production technology. Ordinary welded steel wheels consist of a forged disc and a rim made from a rolling process. They are relatively inexpensive, but are overweight and prone to deform on impact, which can cause the tire to bleed. In addition, such wheels have a modest design and many owners are forced to decorate them with decorative caps.
Stamped steel wheels from the world's leading manufacturers are close in weight to cast wheels designed for the same cars. The tendency to reduce the weight of the wheel is due to the fact that this improves the working conditions of the vehicle suspension, smoothness, handling, braking and acceleration dynamics.

ALLOY WHEELS

Aluminum based alloys are the most common materials used to make wheels. More expensive magnesium alloys are used less frequently.

cast wheels obtained by pouring molten metal into a mold, followed by turning the seating surfaces and drilling holes after cooling the resulting workpiece. Cast wheels are less durable than forged wheels, so they have fairly thick walls. In addition, during the production process, hidden pores and shells may appear.

Forged wheels obtained by forging with subsequent machining on special lathes (machining centers). Forged wheels are more expensive, but stronger and lighter than cast ones.

The main advantage of light alloy wheels over steel wheels, in addition to their lower mass, is manufacturing accuracy (their runout does not exceed 0.15 mm, in contrast to 1.5–1.8 mm for steel wheels). Features of the technology for manufacturing discs from light alloys make it possible to give them the most diverse shape that improves the appearance of the car (photo 2, 3).
The design of the discs, as well as the properties of aluminum alloys, contributed to the introduction of wheels with a large rim diameter (17-22 inches) and powerful brake mechanisms.

MAIN WHEELS

Maximum allowable static load per wheel must be at least 1/4 of the permitted maximum vehicle weight (in kgf) indicated in the passport or vehicle registration certificate.

Basic wheel sizes are mainly determined by the load acting on them and the dimensions of the brake mechanisms. In foreign catalogs, the size "in" is denoted as ET; "g" - DIA; "d" - PCD.
The determining dimensions for the wheel are the width of the rim and the mounting (landing) diameter, usually presented in inches. In addition, the wheel designation includes a letter indicating the shape of the rim profile. For example, in the 5.5Jі15 marking, the first digit indicates the width of the rim, the letter J indicates the shape of its profile (there are also profiles denoted by the letters E, L, K) and the last digit is the mounting diameter of the wheel, which matches the same tire size.
Landing diameter- diameter of the surface of the rim (in inches) on which the tire is mounted, for example 12; 13; 14; 15; 16 etc. This size must exactly match the fit diameter of the tire being used.
landing width- the distance between the inner surfaces of the rim flanges (in inches), for example 4.0; 4.5; 5.0; 5.5; 6.0; 6.5, etc. Alloy wheels are produced with a diameter of 12-22 inches, while the width of the landing rim varies between 4-10 inches.
Rim offset- distance (in mm) from the mating plane (adjacent to the hub) of the wheel to the plane passing through the middle of the rim. This size is determined by drawing a conditional plane through the middle of the wheel rim and measuring the distance from it to the mounting plane. If the planes coincide, then the overhang is zero. If the mating plane protrudes beyond the plane of symmetry, then the overhang is positive. If the mating plane does not reach the plane of symmetry, the overhang is negative. Most often it is considered acceptable to vary the offset within ±5 mm, but some wheel manufacturers recommend a deviation of ±10 mm. It should be noted that a change in the overhang affects the kinematics of the suspension, handling, bearing life, and vehicle stability. Reducing the offset compared to the value adopted by the automaker leads to a larger track and more protrusion of the wheels from the arches. If wider rims are used, excessively protruding tires will pollute the vehicle more. In addition, the level of its security will decrease.
Mounting hole center diameter(defined in mm) must exactly correspond to the diameter of the circle on which the centers of the mounting (threaded) holes or hub studs are located. Usually this size is displayed in two numbers: in front of the nominal diameter, the number of holes is indicated, for example 4x114.3 (four holes on a circle with a diameter of 114.3 mm). Since automakers have not agreed on the unification of the diameters of the mounting holes, there are a number of fairly similar sizes: 4x98 and 4x100; 4x112 and 4x114.3; 5x98 and 5x100; 5x108 and 5x110; 5x112 and 5x114.3; 5x120 and 5x120.7 etc. It is not necessary to determine this size "by eye". A mistake can cause even a properly balanced wheel to have a lot of runout, and damage to the threaded connections is also possible. With a caliper you can measure this size, but it is best to get the data from a sales consultant.
Center hole diameter(defined in millimeters) must correspond to the diameter of the centering lug on the vehicle hub. The most accurate wheel alignment is ensured when the central hole of the disk coincides in diameter with the cylinder protruding from the hub. In cases where the diameter of the central hole of the disk is larger than the diameter of the cylinder on the hub, plastic centering adapter inserts are used (sometimes included in the set of alloy wheels). Adapters are designated by numbers corresponding to the diameter of the hole in the disk and the diameter of the axle shaft, for example 67.1–56.6; 67.1–59.1. Centering the wheel using the bolts or nuts supplied with the disc is unacceptable, since their main purpose is to press the disc to the vehicle hub and fix the final position of the wheel.
Annular protrusions(humps) are used to additionally fix the tubeless tire on the wheel rim. They are designated "H" or "H2", which means the presence of one or two annular protrusions of a certain profile on the rim. "H2" collar rims are commonly used for tires with reinforced sidewalls (Run Flat).

WHEEL MOUNTING

The wheel is fastened to the hub with bolts or nuts having a conical, spherical or flat clamping part. Accordingly, conical or spherical surfaces are made in the disc mounting holes. Most often, threads with an outer diameter of 12 or 14 mm and a pitch of 1.25 or 1.5 mm are used for fasteners.
Each fastening element must be screwed in at least 5-6 turns. Bolts tightened more than 6-10 turns may touch brake parts. The tightening force should be about 10-11 kgf / m.
Alloy wheels have a thicker rim center than steel wheels and require longer bolts or studs. Bolts and nuts for such wheels must have a subhead, which excludes the “milling” of the edges of the wheel mounting hole by the edges of the head.

Wheel centering

Wheel centering is ensuring that its axis of rotation coincides with the axis of rotation of the vehicle hub (balancing stand flange). The method of centering is laid down during the design of the car. As a rule, it is carried out by the clamping part of the fastener and the edges of the wheel mounting holes. In this regard, it is unacceptable to use fasteners with an unsuitable clamping part.

DESIGNATION AND MARKING

All wheels must pass mandatory certification and comply with the requirements of OST 37.001.429, OST 37.001.479 and GOST R 50511 “Light alloy wheels for pneumatic tires. General technical conditions".
Each wheel must be clearly marked with the following information in a conspicuous place:
1 - trademark or name of the manufacturer;
2 – date (year and month) of casting manufacture and melt number (for light alloys);
3 - symbol of the rim profile;
4 – rim offset, mm;
5 - maximum static load, kgf;
6 - mark of conformity according to GOST R 50460.

When buying wheels, it is more advisable to contact specialized stores, where they will help you make the right choice and carry out the necessary fittings. It is very difficult for a non-specialist to identify possible defects in the tire-wheel system. Usually, when buying a full set of tires and wheels, they assemble and balance the wheels for free, except for cases when the standard summer tires are replaced with a newly purchased wheel (such a rearrangement is associated with the expediency of using standard steel wheels in winter).
The wheel assembly is a rather complicated assembly, so it is better to form it in one place. In the event of a loss of balance, for example due to the possible deformation of the tires or the mounting holes on the disk after the break-in, specialists can eliminate the defects free of charge. If the purchases were made in different places, then there is no one to make claims in these cases.
You can also carry out the necessary rearrangements in the car dealership where the car was purchased - this is the most reliable, but somewhat more expensive.

Sometimes car owners are faced with the need to replace the disks on their car with new ones. But one has only to come to the store, motorists are immediately lost, such a large assortment of wheels is presented in them. It is not possible to choose something specific. When choosing discs, you need to take into account a huge number of parameters. One of them is the diameter of the central hole of the disk. You can find out what it is, what it affects, what characteristics are best for your car, from this article.

What parameters do you need to know when selecting discs?

At first glance, it may seem that choosing a new disc for your wheel is not difficult. But then you come across designations of the following type: 4 * 108, 6S ET47, Dia 62.5, R17. Yes, it is in this form that all technical characteristics are indicated. Because discs have many parameters that you need to consider when buying. What do they include?

Disc type: cast or stamped.
Mounting holes: number and diameter.
Hub shape.
The diameter of the central hole (hub).
Disc circumference diameter.

If these nuances seem redundant, then any wheel shop will be able to help you. If you want to understand all the details yourself, let's try to understand what the diameter of the central hole of the disk is. What is this?

What is the disc center hole diameter?

This is a hole in the middle of the disk, which, despite its apparent simplicity, determines many parameters of the car. In the list of wheel characteristics, it is usually marked as Dia or simply D. Do not confuse it with the designation of the PSD, which indicates the size of the mounting holes. The diameter of the center hole of the disc must exactly match the diameter of the seat cylinder on the hub. Often, the same discs are produced for several car brands at once, so before buying, be sure to check that this parameter complies with the manufacturer's technical specifications. The disc may not stand up properly, hold loosely, because of which you will constantly feel vibrations and uneven wheel travel. It is even better to buy original spare parts. If this is not possible, then carefully study the options for the size of the central hole. Usually a deviation of 2-5 mm is allowed on cast wheels and 0.01 mm on stamped ones.

What parameters are affected by the central hole?

Manufacturers of modern rims are faced with a huge number of brands and models with different parameters. Naturally, it would be pointless and very costly to produce discs individually for each car. Therefore, companies take the path of least resistance: they produce wheels with the largest possible center hole. And this is not very good effect on the behavior of the car, especially at high speeds. What other parameters are affected by this hole?

Uniform tire wear. Selecting a disc with the “wrong” center hole can result in uneven tire wear. Due to improper load distribution, the tread pattern can be erased on only one side, which will eventually affect other characteristics of the machine.
Tire life. How much you can drive on a new set of tires also depends on the right choice. Properly selected rims increase tire life.
Steering wheel life. If the car has developed a sufficiently high speed, and the DIA is chosen incorrectly, then the steering wheel begins to “beat”, which ultimately leads to its breakdown.
body vibration. If at speeds above 80 km / h your car began to “shake”, then most likely the problem lies precisely in the diameter of the central hole of the cast disk.

What if the center hole of the disc is larger than the diameter of the hub?

All disk sellers recommend checking them on a car before buying, and it is advisable to drive them at least a short distance. It is even better to accelerate to a speed of 60-80 km / h in order to understand exactly how the new wheels behave. It is difficult to put discs with a central diameter smaller than the diameter of the hub on a car. Is it possible to install wheels with a larger diameter? Of course, it is best to choose a hole that is ideal for your car. If this is not possible, then you can install the so-called universal disk, with a large central hole. To do this, you need to purchase a set of adapter rings that will compensate for the difference between the hub and the disc. Take care that they are not damaged in time and that they are always put back after a seasonal change of wheels. When trying on discs, do not forget to check if there are any rings on the hub from previous discs.

Pros and Cons of Enlarging the Center Hole

What does the central hole affect, and will the technical parameters of the car change when it is enlarged? The positive aspects of a disc with a universal central diameter include:

Availability - these discs can be found everywhere. As a rule, they are produced for a large number of brands and models, so it will not be difficult for you to choose the right one for you.
Versatility - discs with a large center hole fit many models.
Price - since such goods are made in large quantities, the price for it is slightly lower than for "exclusively" selected discs.

But not only pluses can be encountered if you choose a disc with an increased central diameter. This choice also has not very pleasant consequences:

At high speeds, due to the loose fit of the disc to the hub, the car starts to “beat”. Only disk replacement can save you from this unpleasant phenomenon.
In the worst case, if you chose the wrong wheel and did not install spacer rings, the threads on the nuts may break off at the wheel. This is an extreme option, but it still happens if you neglect the safety rules.

Hub diameter for different vehicles

Each car has its own list of permissible landing wheel diameters. The parameters may change, usually you can find them by the sticker next to the driver's seat or from the technical specifications of the car. A variety of diameters of the central hole sometimes introduces buyers into bewilderment. They sometimes differ literally in 0.1 mm. There are no uniform standards, so some manufacturers indicate the data more accurately, while others less. Some self-respecting disc manufacturers go further and indicate not 1/20 of a millimeter, but up to as much as 10 microns, i.e. up to 0.01 mm. What standards are adopted for the most popular car brands?

The diameter of the central hole of the disk at the VAZ will be 58.6 mm.
The same figure for Audi is 57.1 mm.
The diameter of the central hole of the Honda disk is 64.1 mm.
At BMW, the hub diameter ranges from 74.1 to 72.6 mm.
In Citroen brand cars, the indicators also differ - you can find cars with a central hole diameter of 65.1 and 58.1 mm.
Fords also have a wide range of sizes: 57.1; 63.4 and 64.1 mm.

The diameter of the central hole for the "Niva"

Domestic Niva cars have rather wide hubs. The diameter of the central hole of the disk at the Niva is approximately 98.5 mm or 3 and 7/8 inches. What car rims can fit this car if you can't buy original ones?

NivaChevrolet;
Volga (GAZ 31024, 29), different model years;
or Jimny.

Renault Logan center hole diameter

When choosing wheels, owners of Renault Logan cars often wonder what parameters to choose among the variety of assortment? For Renault Logan discs, the diameter of the central hole must be at least 60.1 mm. At the same time, it is better to select their radius with indicators R14 and higher. Many rims are suitable for such conditions, which greatly simplifies the task for drivers.

When buying wheels, experts advise paying attention to the following details:

If you buy a stamped disc, be very careful when choosing parameters. Even a deviation of 0.1 mm will be critical: adapter rings are not used for steel rims, so you will not be able to ride on such wheels.
The diameter of the center hole on alloy wheels can be easily determined using a special plastic ring. With it, you will find out the exact parameters without resorting to outside help.
If you purchase original discs for your car, then you will not need any adapter discs. As a rule, such a product is made exactly to the parameters of the hub hole of a car of a certain brand.