Monday, February 19, 2024

Tires and rims - the entry

Reading time 5 Min.

Tires and rims - the entry

Basically, the rims for the vehicle must of course be suitable. This means, on the one hand, nothing is allowed schleifen and on the other hand, the tread must be properly removed from the body covered be. In addition, suitable also means that the technical data must match the tire and vehicle type. A technical report or a Teilegutachten Eg from the TÜV for the rims. The information printed on the rim alone is not sufficient!

Comparative report, comparative entry, different hole circle or size than in the document: not permitted!

Tires and rims - the entry

Unfortunately, if your rim (the rim type) was registered on another vehicle, this will take you away not further. The reason for this is that the proof must always have the information for exactly the rim to be entered and mounted. The document becomes invalid immediately as soon as even a single piece of information differs. Your vehicle must be in the papers that come with the rim not explicitly listed be. Only that matters mentioned above and that the maximum load of the rim is sufficient for the vehicle weight. It is important here that the rim load must be at least 10 percent higher is than the axle can be loaded (see axle load in the vehicle registration document).

Here is an example:

The axle can be loaded up to 1200 kg and the rim up to 600 kg: 2 x 600 kg corresponds to 1200 kg. This means the maximum load capacity of the axle is identical to that of the rim and is therefore an entry impossible.

The desired tires must necessarily have a Tire approval for the corresponding rim size. Please pay attention to the Rolling circumference including tolerance. The ideal size is 0 percent. However, this does not always work. The possible tolerance in the rolling circumference is: +1% / -4%

Tires and rims - the entry

Just use our tire calculator and enter the relevant data there. In this way it can be checked whether the tolerance is correct. Is the rolling circumference out of tolerance, in most cases one must Speedometer adjustment take place. The displayed speed must always less be than the actual. And both the tires and the rims must of course not be attached to the wheel housing liner, the bodywork, the spring strut or other vehicle and chassis parts schleifen. In addition, it is important to ensure that the tires have a E-mark feature. We only mention this as a precaution, since vehicles from Japan, for example, often have new tires, but these are not allowed to be driven here.

The tire data!

And also the Speed ​​index the tire has to fit. For example, if your vehicle registration document mentions a maximum speed of 250 km/h, the tires must be designed “at least” for this speed. The code letter when specifying the tire size is decisive for this (e.g. 255/35/R18 Z -> here the Z stands for the speed index).

  • T = 190km/h
  • R = 200km/h
  • H = 210km/h
  • V = 240km/h
  • W = 270 km/h
  • Y = 300km/h
  • Z = over 300 km/h

Important tire information

The DOT number must be observed for the entry as soon as a wheel combination is to be entered and you are on the safe side want to be on the go. The production date can be used to tell how old your tire is. The date is embossed on the side wall and has four digits. This DOT number basically reveals when the tire was manufactured. For example, if the combination is 4820, the tire was manufactured in the 48th calendar week of 2020. And what about new tires that are stored for a longer period of time? as factory new apply to tires up to an age of 3 years up to a maximum of 5 years with professional and appropriate storage.

Tires and rims - the entry

When buying and fitting, "unused" tires that are not older than five years are technically harmless. The disadvantage: They have a limited useful life. The minimum tread depth for car tires in Germany is 1,6 mm. This is required by law. Despite this minimum tread depth, the tires should not be traversed up to the prescribed limit value. The lower the profile, the poorer the braking behavior and traction of the tires on wet roads. At least 4mm profile should therefore have the tires in wintry conditions. And the 4 mm are even required by law for winter holidays in the neighboring Alpine countries of Switzerland and Austria. Tires with a lower profile are considered there summer tires.

The tire attachment

The thread of the wheel bolt on the vehicle must be at the wheel nuts be long enough. It is not uncommon for the wheel rim size to be too short due to a different ET (offset). Are important enough threads for securely screwing on the tires (at least four threads and better still more). The same also applies to wheel bolts! In the case of wheel nuts made of aluminum, an expert opinion must also be available. And the aluminum wheel nuts, please No way fasten with an impact wrench. Wheel nuts made of steel, on the other hand, can be replaced and used normally if they are the standard nuts. Please - as mentioned above - pay attention to the thread.

Tires and rims - the entry

Of course, that wasn't the end of it. has a lot of other articles on the subject of auto & tuning in stock. Do you want to see them all? Just click HERE and look around. But also planned changes in the law, traffic violations, current regulations in the field of road traffic regulations or on the subject inspection we would like to inform you regularly. You can find everything about it in the category "Test sites, laws, offenses, information". Click on one of the following posts!

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About Thomas Wachsmuth

Thomas Wachsmuth - He has been an integral part of since 2013. His passion for cars is so intense that he invests every available penny in them. While he dreams of a BMW E31 850CSI and a Hennessey 6x6 Ford F-150, he currently drives a rather inconspicuous BMW 540i (G31/LCI). His collection of books, magazines and brochures on the subject of car tuning has now reached such proportions that he himself has become a walking reference work for the tuning scene.  More about Thomas

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