Many car owners are familiar with the feeling of annoyance when the wheels they saw in the window and liked very much did not fit the car. And it’s even more offensive when all their parameters are as they should, except for one, and most often in such a situation the diameter of the hub hole turns out to be inappropriate. Is it always possible to level this issue, and what to do if the DIA turned out to be the wrong size?

1. What should be the center hole

Before looking for workarounds that allow you to put a non-native disk on the hub of your car, let's clarify what exactly the abbreviation DIA means. This is an abbreviation for the word "Hub Diameter", which literally translates as "landing diameter". This is the name of the size of the central hole in the disk, corresponding in diameter to the landing belt on the hub.

Before choosing wheels for a car, match the DIA with the size of the hub

2. If the central heating is more than necessary

Increasing the center hole on the discs is quite acceptable, but with one condition - if you find an adapter of the right size. What it is? This insert is a centering ring made of metal or plastic, the outer diameter of which corresponds to the hole on the disk, and the inner diameter of the hub. Therefore, two sizes are always indicated on the rings, which we see in the photo.

Sometimes the difference between these circles is only 1 mm, and the owner of the car has a desire to put on these discs and drive like that. What is the risk?
If the disk does not fit tightly to the hub, the wheel is forced to be centered by fasteners - bolts or studs. They have to take on all the shock loads, as a result of which they deform or simply break.
With uneven mounting of the wheel, the disk is displaced from its axis, radial runout appears, which cannot be eliminated on a balancing machine. At the same time, at a certain speed, the steering wheel can beat, an unpleasant vibration of the body occurs, which can contribute to spontaneous unscrewing of the wheels.
But even if this did not happen, then the car is provided with accelerated wear of the steering rack, shock absorbers, ball bearings and all rubber bands on the suspension. And this is not to mention the premature and uneven wear of the tread on tires, which are already quite an expensive pleasure for every driver.

To avoid such an impressive number of problems, you should look for either discs with the correct hub hole, or adapters, the price of which is a maximum of 150 rubles. per piece (if aluminum) and 50 rubles if plastic. Moreover, normal stores selling discs most often also have an assortment of centering rings on sale.
In addition, many manufacturers purposefully produce universal wheels with double drilling, which can be installed on different cars. In this case, the central hole has the largest of the possible diameters, and the transition to a smaller one is provided precisely due to the hub adapters.

Note: Basically, these options are offered for passenger cars, with a hub size not exceeding 73 mm. It doesn't happen that you can take the rims off a big SUV and put them on a small sedan.

3. If the hole on the disc is smaller than the hub

It is foolish, of course, to buy knowingly unsuitable wheels for a car. Why grind discs if you can find the native size without any problems? But sometimes you have to.

The situations are different. For example, a car model is quite rare, and wheels with the right parameters are simply not found in stores. Or let's say a person can't afford to buy a new kit, and there's a good one on the market that just won't fit on the hub of your car.

Note: To determine the exact difference, you need to use a caliper and measure the diameter of the hub and the diameter of the hole on the disk, as shown in the photo.

Before choosing used wheels, measure the hub hole

4. Independent boring of steel discs

In this case, car owners often turn to turners with a request for boring, or are looking for an answer to the question: how to machine the central heating of a cast disk yourself. Of course, this is not a job for a garage, because it is necessary to remove a layer of metal, and this must be done precisely. Take off the excess - ruin the discs.

The maximum that can be done at home is to remove 1-2 mm if the discs are iron. To do this, you can use a drill with a petal circle, adjusted in diameter to the disc hole.

But it's stamping. Is it possible to grind alloy wheels from the inside? We will answer this question further.

5. Cast disc turning

In general, it is undesirable to do this, since the strength of the disk at the point of its attachment to the hub weakens under mechanical action. It can simply crack when moving. If sharpening, then quite a bit, and it is better to do it in a normally equipped workshop.

In this case, the disk is placed on the table of the jig boring machine. There are studs in its grooves and a hub is put on so that the disk can be fixed with high quality.

For rough centering, a cone is installed, which is lowered into the disc center, after which nuts are screwed onto the studs.

Then the cone is removed and a micrometer is put in its place, with the help of which a more accurate position of the disk on the table is determined. That is, complete centering is carried out.
Next, the cutter is installed and the groove of the disk begins. An inside gauge is prepared and fixed at the size to which the hole needs to be expanded.

The initial adjustment is carried out approximately, the exact value is reached already in the final.

Ready, bored discs will only have to be tried on.

Work on boring holes for four discs will cost about 3000-3500 rubles. If you consider this amount, coupled with the cost of used disks (and even more so new ones), to be quite acceptable, then it's up to you. But their condition will have to be monitored regularly, because a small crack around the Central Organ can grow into a big problem.

5. Hub holes and bolt patterns for cars from different manufacturers

When buying discs in a store, there are no problems with finding out their dimensions. All parameters are indicated on the price tag, and if not, you can read it on the packing box. If the native size was not on sale, the consultant will always tell you from which car the rims are suitable for your car.

Basically, a car owner may need such information if he purchases wheels from his hands. How to choose alloy wheels bu will be discussed later.

6. Models and sizes. Parameter table.

Since when choosing discs, you need to be guided not only by DIA and radius, but also by bolt pattern and offset, we present a table with the main parameters of the discs of the most popular cars. It will show from which cars the wheels are suitable for a particular car.

Although not all makes and models of machines are listed in the table, we hope that this information will help you navigate the parameters. But before how to choose wheels for a car, it is necessary to accurately measure the hub hole on them.

Departure (ET) can be read on the back of the disk - where exactly, in the photo is shown by an arrow. As for PCD, it will have to be calculated according to the formula, depending on the number of holes. You can read more about this on our website

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 wheels are 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 disc. 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 to choose new disk easy for your wheel. 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 movement. 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 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. From right choice It also depends on how much you can drive on a new set of tires. 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? TO positive aspects disk with a universal central diameter can be attributed to:

• 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 cars

Each car has its own list of permissible landing wheel diameters. Parameters may vary, usually you can find them on a sticker next to the driver's seat or from specifications cars. 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 are purchasing original discs for your car, 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.

A topical question among motorists is: “what is DIA on disks?”. To ensure the further operation of the vehicle, it is necessary to make the correct selection of wheel structures. After all, road safety depends on their properties. With the violation of all indicators of the wheelbase, the mechanism deteriorates, and the controllability of the vehicle also deteriorates.

When it comes to purchasing new components, it is quite difficult to do without expert advice. When choosing designs for their car, many are not even familiar with the basic parameters. Therefore, before installing components on your car, you need to study all the indicators of the vehicle indicated in the technical passport of the manufacturer.

DIA value

Their list primarily includes the removal, PCD, DIA, product width, etc. An important role is played by the marking of the wheels. Its indicator is usually indicated on the label or in the technical data sheet. This information displayed for all types of structures in a standard format.

• A is the diameter of the central hole of the disk;
• B - width;
• ET - structure overhang is used to determine the distance between the space where the rim is attached to the hub and the inner sphere of the structure.

The mating plane is the base that connects the rim to the vehicle hub. When choosing designs, one should not be guided only by the external data of the components. Otherwise, you can worsen the technical condition of the vehicle, as well as handling on smooth asphalt or off-road.

The disk overhang is divided into positive, negative and zero. In the latter version, the mating plane of the product is determined between the middle of the structure. If they coincide with each other, then the type of wheel is considered null.

Sometimes it happens that the departure rate is lower, then the structure will stick out ugly from the outside of the vehicle. However, some motorists like wide components. So they choose the first option. In the second case, everything looks different: the larger the value of ET, the denser the structure sits inside the machine.

Note!

The width of the structure may differ from the offset value of the disc. Many manufacturers of automotive components indicate in the technical data sheet for a car on disks with a larger width a lower offset.

PCD means hole circle diameter rim. This indicator determines the location of the mounting holes of the wheel development.

Often, beginners and even experienced drivers cannot decipher the designations indicated on car wheels. In order to avoid mistakes when choosing tires, you must carefully study all the indicators. What is DIA on discs is the diameter of the center hole. On many manufactured alloy wheels, to give the car a presentable appearance, the diameter of the center hole DIA is made large. For a competent choice of the size of the hub of a car, experts recommend deciding on an adapter ring or bushing.

Design bore

Product mounting hole

The landing diameter of the wheel rim is as follows - 7.5 j x16 H2 5/112 ET 35 d 66.6:

• 7.5 - width of the structure.
• J is a feature of automotive designs.
• x - inseparability of the wheels.
• 16 - landing diameter.
• H2 - two protrusions.
• 5/112 - is determined by the number of mounting holes for bolts or nuts, and 112 - serves as a circle diameter.
• ET 35 - product size, which is 35 mm.
• d 66.6 - diameter of the central hole.

Is it possible to install accessories with a large center hole

Is it possible to install structures with a large central heating

The question of what effect does the DH have on car rims, remains relevant among both beginners and experienced drivers. A disc with a universal center diameter is sold in all stores, as well as online resources. Modern designs that have a large center hole fit many models.

The main reason why original automotive developments are noticeably more expensive than even the highest quality non-original counterparts is the requirements of automakers for them.

What is central heating on car disks

What does CO mean

Many are interested in the question of what is the central hole of the disk. This indicator determines many parameters. The controllability of the car on icy / wet asphalt depends on this value. When choosing wheels for a car, DIA is defined as a characteristic of the wheel. Sometimes manufacturers may refer to this indicator as D. Some car owners buy large mounting bolts that are not placed on the structure. All these nuances should be taken into account to ensure the safety of the driver / passenger.

What to do if the CO of the structure is larger than the CO of the hub

CH size difference

The diameter of the center hole of the disk must match the diameter of the landing cylinder where the hub is located. In recent years, many manufacturers have begun to produce the same development for several car brands at once. Therefore, when purchasing new components for a vehicle, it is necessary to determine the compliance of this parameter.

What is a wheel hub hole

For each machine, there are allowable parameters that must be considered before buying accessories or components. For example, the parameter of the landing diameters of the wheels plays an important role. The indicators can differ significantly from each other. The exact value can only be determined from the label.

The variety of center hole diameters confuses many buyers. A slight difference may affect the technical condition of the vehicle. For example, most often it differs only by 0.1 mm.

Motorists are often interested in the question of what Dia is in the parameters of car rims. The aforementioned requirements of wheel manufacturers for automobile wheels produced under their brand are not so much appearance how much their quality.

Thus, when determining the PCD, all characteristics of the vehicle must be taken into account. Basically, the mounting holes of tires go on sale with a large indicator.