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Loosening of wheel disks: compatibility table

January 17, 2020

Outside cars, having unusual alloy wheels, attract much more attention, and, seeing such a car, I want to have the same spectacular wheels.

Tuning your vehicle, you need to know the measure, and choose such components for the wheels, that they did not wear out a suspension bracket and did not worsen management and comfort in salon. For this reason, the parameters of the component wheels must be compatible with your car. To do this, you need to know, what is loose wheel rims, and be able to use the compatibility table, for which provides the optimal parameters of the rims.

Loosening of car wheels

Characteristics of loosening

If you decide to replace the wheels of your car, putting cast rims, whether you plan to "change shoes" your four-wheeled friend with the onset of cold weather, you must take into account the loosening of the wheel rims. What is disk unraveling?

To make life easier for drivers, loosening of wheel disks (compatibility table, to be precise) Today it is available on the Internet for almost all car brands. This concept includes several of the following characteristics:

the number of holes for the machine hub bolts. It is marked with the letters LZ and indicates the number of fasteners, by means of which the wheel is screwed (usually from 3 to 6, if the car is a car);
distance, on which there are bolts;
diameter, on which the fasteners are located (PCD, decrypting yak Pitch Circle Diameter). It is set at the car manufacturer.

Scheme with markings on the wheels

Speaking of which, what is loose wheel rims, it is not superfluous to mention disk marking. Example, designation 6Jx16H2 ET20 PCD: 5/110 d 66.6 you can find out:

product width, specified in inches (6);
J - type of side edges;
diameter of the device, also measured in inches (16″);
H - a kind of design of humps;
wheel departure (ET20), which is measured in millimeters;
PCD - the diameter of the mounting hole and their number (5/110);
D is the diameter of the rim hole in the center (6,66 mm).

How to learn the looseness of these parameters? It's simple: 5/110 tell us about it, that on the rim 5 bolts, which are located on a circle with a diameter up to 110 mm

Unscrewing of wheel disks of the car

Rules for determining loosening

Selection of disks on parameters necessary for you - employment is not so difficult. It requires careful review of the characteristics of the wheels and a good "eye gauge". The first parameter, number of fasteners, easy to identify with the naked eye, just counting the bolts.

As for the distance, then you have to be extremely careful, if you want to define "by eye". The most difficult thing in determining the looseness of the wheel disks is the diameter, on which the bolts are located. There are many ways to do this on the Internet today, as determined by the loosening of the wheels. Compatibility tables contain useful data only for popular makes and models of cars. However, how to be that, whose car is not there? To determine the compatibility of the discs with the wheels, for them came up with a simple way.

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Lexus wheel compatibility chart

Looking at the picture, you need to understand first, how to know the value of A. To do this, follow the following algorithm:

take the caliper, use it to measure the value between adjacent mounting holes;
add to this the size of the diameter of the mounting holes;
you get a number, which is the distance between the centers of one and the other mounting hole. It will need to be multiplied by 1,155, as shown in the formula in the figure.

Similar steps will need to be taken, if on your wheel drive 4 or 5 holes. Each time the obtained value of A will need to be multiplied by a factor, to get the required Pitch Circle Diameter.

Unraveling of disks on KIA Rio

Danger of improper loosening

The definition of loosening should not be neglected. It is she, albeit indirectly, but affects driving safety. If you install the wheels, not taking into account deviations in either direction, then it will be mounted with an inaccuracy along the axis. It, in turn, will not allow to reach the necessary level of an inhaling.

Identify, whether the loosening was done correctly, "By eye" is almost impossible. The consequences of improper installation will be noticeable when driving on such grounds:

increased beating of the wheels;
damage to the steering mechanism, pendants;
increase the probability of unscrewing the wheel.

As you can see, loosening has a serious impact on safety and can even lead to an accident.

Quite often among motorists it is possible to hear stories about adjustment of characteristics of the car to new disks, in which the PCD value is greater, than regular (they, that the automaker predicted). Often during installation they use centering rings for disks. It is worth mentioning the ambiguity of this method, however, many motorists see this as a way out when changing discs.

<h2 id="h2_4">Features of unraveling of different types of disks</h2> Today on the market you can find these types of car wheels: <ul> <li>stamped (steel);</li> <li>cast (alloy);</li> <li>forged.</li> </ul> Rating of car seats: crash test results Steel models have gained popularity due to their modest cost, as well as the ability to perform straightening with dents (they rarely crack and usually do not require expensive welding). Straightening is available to them due to high strength - this model does not burst even in direct contact. Unraveling of stamping should correspond to standard specifications. <img />The table of loosening of car wheels Cast models are quite simple, but not as durable during operation. Loosening of wheel disks, compatibility tables which are presented by each manufacturer, must also comply with staffing standards. Forged models are quite rigid and strong. They do not burst during operation (it is extremely difficult to make a dent on them), and are not subject to the destructive effects of corrosion. In addition, the forged disk can be repaired by rolling in a car repair shop if it has dents. So, only properly done loosening will save you money on relatively frequent repairs of the steering mechanism and suspension, and make driving safer. It, certainly, more valuable, than the desire to put on your car inappropriate characteristics of the wheels. <img />Table of combinations of wheel disks and BMW tires 3 series <h2 id="h2_5">Departure of a disk of wheels</h2> No less important, than loosening, the value is departure. In the example of disk size, the departure is 20 mm. This means, that the distance between the middle of the width of the disk and the pull plane - 20 mm. It can be determined by the formula ET = a-b / 2, where b is the total disk width. The disc travel is not affected by the following factors, as the disk diameter or width, as well as bus parameters. <img />Departure of a car wheel disk Exist 3 departure value types: <ul> <li>zero departure is achieved then, when the above 2 the planes coincided;</li> <li>positive departure is reached at an arrangement of a privalochny plane behind the wheel center. The wheels are located inside;</li> <li>negative departure is possible, when the landing plane is located in front of the center of the wheels. If you set a lunch with a negative departure, he will speak outside, at the same time risking to touch a wheel arch.</li> </ul> Except for the Germans, which most often denote departure by the letters ET, you can find on sale discs with the inscription DEPORT (typical for component manufacturers from France) and OFFSET, which is typical for other producing countries. When buying, be sure to pay attention to the combination of the product with the car. Otherwise, the suspension units and other elements will be an insurmountable obstacle to installation.