The wheel drive is one of the most responsible parts binding the car with an expensive through the bus. When replacing rubber or buying new disks, it is often necessary to learn the steam parmeters. Decoding the labeling of disks and other designations to them will help to deal with all the parameters and characteristics of your wheels.
Most characteristics wheel disks It affects the safety of the ride and the duration of trouble-free suspension. When choosing disks, it is necessary to find out how the models with what characteristics are allowed to use on your car. Only, according to all requirements, they can be installed on the machine.
Marking discs
Stamped and alloy wheels for passenger cars The same standard designation (marking) has the same. Certification of discs in the territory of the EU countries is carried out according to UN / ECE 124.
As an example, you can decrypt one of the timing marking options: 7.5 J x 15 H2 5x100 ET40 D54.1
Decoding this marking will be as follows:
Rim Width (Rim Width)
The figure of 7.5 in the example of the marking indicates the distance between the inner edges of the rim in inches. This indicator is taken into account when choosing a tire, since each tire has a specific range of rim width. It is best when the rim width is on average tire range.
Rim Edge Type (Flange)
The Latin letter J in the disk marking indicates the shape of the rim. This is a place in which the disc is connected to the bus. Among the most common designations for passenger cars are found: p, d, b, k, jk, jj, j. Each letter hides several parameters:
- round radius,
- profile contour form
- shelves tilt angle
- height height, etc.
Most often in modern passenger cars there is a scout in the form of J. All-wheel drive models Usually completed with discs with the designation type JJ.
Rabbing rims of a wheeled disk have an impact on the installation of a tire, a mass of balancing weights, stability of tires to displacement in extreme situations. Therefore, despite the external similarity of the disks JJ and J, it is necessary to give preference to the edge of the rim, which the automaker recommends.
Body detacity
The sign "X" suggests that the rim is carried out in an inexplicable form and is a single whole, and the sign "-" indicates that it consists of several components, and it can be disassembled and assembled. Dear discs differ from folding structures with ease and greater rigidity.
Wheel wheels with rim "x" are designed to operate them with elastic tires, which is characteristic of passenger and small trucks. In the case of cargo tires that differ in rigidity, detachable disc designs are required. In another, it is simply impossible to install the tire on the wheel drive.
Mounting diameter (Rim Diameter)
The mounting diameter is the size of the landing rim of the wheel disc under the bus.
The mounted diameter is usually indicated in inches (in our example is a number 15). In everyday life, motorists are also called it with a radius of the disk. When the tire selection, this indicator must necessarily coincide with its mounting size.
The standard values \u200b\u200bof the mounting diameters of the disk for passenger cars and crossovers will be values \u200b\u200bfrom 13 to 21.
Ring protrusions or podcasts (HUMP)
The designation H2 is decoded as follows. Ring protrusions (champs) are with 2 sides of the disk. These pods are designed for fixation. delivel tire on a wheel disc. They prevent the air outflow in the event of an external tire effect. Other designations are applied:
H - Hump is only on the one hand,
FH - Podcast has a flat form (Flat Hump),
AH - at the protrusion asymmetric form (asymmetric hump), etc.
Location of mounting holes (Pitch Circle Diameter)
In labeling 5x100, the first digit indicates the number of holes in the wheel disk. The number 100 denotes the diameter of the circle on which the mounting holes are placed.
- The number of fasteners for passenger cars usually ranges from 4 to 6 pieces.
- Standard values \u200b\u200bof the circle diameter will be 98 ÷ 139.7.
Determine on the eye matching the size of the hub and the disk is not always possible. And the installation of the disk 98 instead of 100 can lead to the wheel distortion, which will cause the beyon, as well as spontaneous unscrewing bolts.
Disk departure (ET, EINPRESS TIEF)
Disk departure is the distance between the plane of the disk touch with the hub and the plane that passes through the center cross section Wheel disk. The value is expressed in millimeters, and the departure is as positive (ET40) and negative (ET-30).
The diameter of the planting hole (Hub Diameter, Dia)
The central (hub) seating wheel of the wheel disc is indicated in millimeters, for example D54.1. The diameter of the planting opening in passenger cars ranges from 50 to 70 mm. It is very important to accurately select the disk in accordance with the landing belt of the hub of the car.
Even with minor deviations of one of the parameters of the wheel disc from the requirements of the automaker, the threat of accelerated tire wear appears, which can lead to its destruction in an extreme situation (high speed, sharp braking, steep turn).
When you stop the machine around the engine, you can call the tow truck, wizard or leaving for help on "traveler". But when at high speed, the tire breaks or the wheel from the hub is taken away, it creates the danger of the driver's life, passengers and other participants road. Therefore, the wheels should always be in good condition and are under constant driver control.
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Selection of precise tire size Skoda Fabia Hatchback 1.6 16V (5J) 2007-2014
Many tires on Skoda Fabia Hatchback 1.6 16V (5J) 2007-2014 appearance Very similar to each other. It would seem the tread pattern the same, but the degree of its complexity is individual for each model. One and the same option can exist hundreds of subspecies, so you choose summer tires, the price of which is suitable for almost any budget, especially carefully, given the slightest details. When buying new tires, it should be considered:
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Winter tires
In the cold season, it is important that the tires have high indicators of traction-coupling properties with snow-covered and icing coating. In addition, their characteristics should include:
- high strength;
- excellent permeability;
- excellent confrontation with storks;
- durability;
- reinforced frame;
- optimal clutch and braking efficiency.
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Example: Wheel disk marking 5Jx13 et \u003d 29 pcd \u003d 4x98 Dia \u003d 58.6
- Et \u003d 29. - Departure. It may be less than standard by 10 mm and depends on the width width. The smaller the magnitude of the departure, the wider the wheelbase.
- 13 - size (diameter) wheel rim in inches. May be different for the same car and depends on the size of the tire mounted.
- Dia \u003d 58.6. - diameter of the hub hole in mm.
- PCD \u003d 4x98. - The number and diameter of the location (in mm.) Fastening holes. Must fully comply with the standard.
- 5.5J. - Width of the wheel in inches (in this case five). May be different for the same car and depends on the size of the tire mounted. J - Clear information about constructive features Side rim crook (tilt angles, rounding radii, etc.) in this case indicates the presence of one boral.
It happens that the manufacturer does not use alphabetics ("PCD", "Dia"), but only their meanings. But in any case, all adhere to a certain sequence in the notation.
After this article, I think it is not difficult to decipher this labeling, which almost does not use alphabetic designations: 5 1/2 J x 14 CH 4/100 ET35 57.1
Noticed unfamiliar letters? For sure! We have not told you about one designation - ch and akin to him.
SN - Letter N. (Sokr. From HUMP) Indicates the presence of ring protrusions (Humps) on the rim shelves, which hold the cannon-free tire from scraping from the disk. There is a simple Hamp N. , Dual H2., flat Fh. (Flat Hump), asymmetrical AH. (ASYMMETRIC HUMP), Combined Ch (COMBI HUMP) ... sometimes cost without boumps; x - this sign between conventional symbols The widths and planting diameters indicate that the rim is undoubted.
Exists "People's" The method of calculating the desired disk width under a certain width of the tire:
- tire tread width - 20% \u003d disc width;
for example 205 / 70-14: Width of 205 mm - 20% \u003d 164 mm We divide by 10 (in 1cm \u003d 10 mm) \u003d 16.4 cm We divide by 2.5 (1 inch \u003d 2.5 cm) \u003d 6.5 inches.
