The times have sunk into oblivion when it was possible to get something worthwhile for a car only by pulling. Now one wheel offers two or three dozen. Not bothering ourselves too much, we bought six species. Only stamped. Get to know each other?
Under the first or second numbers in our tournament, Mefro and KFZ will be seeded. Both come from Germany, which did not fail to affect their price - respectively 670 and 710 rubles per wheel. A very good impression at the meeting “on clothes” is the Uzbek disc from “UzDaew”. The price is noticeably more modest - 450. Almost as much they ask for VAZ "relatives" - a little more than 400. True, here are the options. We came across two discs of different quality in color and both, it seems, were from Tolyatti. We conditionally call one of them gray, the second - pearl. The last in our account are the Kremenchug wheels from KrKZ. They are also the cheapest - 320-340 rubles per item.
Although the wheels are not too complicated, there is something to check in them: geometric dimensions, mass, runout. But this is not the end of the matter. We will ask experts to conduct more serious tests.
One of them - on fatigue - simulates alternating bending loads acting on the wheel. The product is fixed to the rim to an impressive caliper (see photo), and a radial load is transferred (via standard mounting holes) to the mounting surface using a long rod in accordance with OST 37.001.404–97. Given the long shoulder formed by the barbell, not so much force is obtained as a bending moment. For the load to become alternating, it is enough to make the support rotate.
What do they want to get by checking the fatigue strength of the wheels? In general, nothing, in the sense that nothing happened to them - there were no visible curvatures, cracks and other things. And it is necessary, when checking the samples presented above, curvatures, cracks, and even “other things” were found. Kremenchug excelled. He developed small deformations and large cracks along almost the entire perimeter of the mating surface. Moreover, if all other participants in the test passed 62–65 thousand cycles stipulated by the methodology, then the wheels of the KrKZ began to fall apart after 46 thousand. The tests were stopped ahead of schedule. But we still promised "other things."
Of the two Kremenchug wheels submitted for testing, one could not be installed at all on the stand due to geometric deviations from the prescribed size. Only the second agreed to stand in the place intended for him.
It is not by chance that we talk in such detail about the products of our neighbors from Ukraine. We would be glad to campaign in favor, as often happens with other products from there, but experts explained: the result obtained is absolutely expected and logical. The agreement between the two countries provides that Russian certification bodies are required to recognize the certificate of Ukrainian colleagues. In other words, their products come to us “without the right to check.” And in this case, such a right would be very useful.
The second special test that awaited our wheels is rarely used for steel - it is standard for alloy wheels.
What will happen to the wheel if it “hurts to hit” (the driver drove into the curb, fell into a large hole, etc.). Obviously, deformations will occur. In some, only the rim can suffer, in others - "all geometry will float away." By the way, it is not difficult to see here what will happen with the paintwork: whether it will be damaged only at the place of impact or exfoliate by a few centimeters.
Let's get started. The blow is applied at a strictly defined angle by a spring-loaded mass and only through a tire mounted on a wheel. Boo-oooh. First fucked up. Flanging is dented, geometry is probably spoiled, but so far we do not know this. Again bu-ooh, more, more … The wheel, not tested for fatigue, was tested for oblique impact.
While experts are taking measurements, we manage to note the only product where the paint exfoliated in large pieces - one of the VAZ disks - the one that we called pearlescent. The rest have no complaints. By the way, we asked experts what two different VAZ wheels could mean. After studying the design and marking, they suggested that both products are actually from VAZ. Gray is traditional, but mother-of-pearl … Either an embodiment, or some experiment, but it seems to be not the most successful.
And here the numbers arrived. The axial runout of the inner flange, rolling on the hub and other interesting things can be seen in the table, and what is not clear, check with the picture. A fairly simple parameter to understand is the angle of withdrawal after impact. For six wheels tested, it ranged from 1.7 to 7.45 °. The Uzbek wheel has the best result, the worst is again with the Kremenchug product. Maybe you should still apply the same rules to everyone?
Leave the outsiders alone and move to the top of the “standings”. Let us state that, in addition to painting (it has already been mentioned), the main criterion for the quality of steel wheels is strength. It depends not only on whether it is permissible to use the wheel after a strong blow (experts do not recommend it), but whether the wheel will deform due to many weak blows that are not dangerous at first glance.
Without going into details, we say that we liked the KFZ and UzDau wheels. The first "in general", the second - taking into account the price.
Manufacturer / KFZ (Germany).
Price - 710 rubles. For the favorite, a slightly large radial runout (within tolerance). But otherwise, everything is great.
Manufacturer / "UzDaew" (Uzbekistan).
Price - 450 rubles. One of the toughest wheels.
Manufacturer / Mefro (Germany).
Price - 670 rubles. Good results. The price is slightly lower than that of a compatriot.
Manufacturer / VAZ, gray (Russia).
Price - 420 rubles. The heartbeat is large, noticeably inferior in strength to the leaders, although it weighs about the same.
Manufacturer / VAZ, mother of pearl (Russia).
Price - 420 rubles. Beating too much, paint does not hold well. In general, worse than a gray brother.
Manufacturer / KrKZ (Ukraine).
Price - 330 rubles. Noticeably weaker than the VAZ wheels. Not tested for fatigue, the outer diameter is too big.
Test bench for checking wheel fatigue.
A - deformation of the disk on the bus.
B - angle after impact.
V - axial beating of the inner flange.
G-rolling on the hub.