Limitation of Winter Tires

[Ice-Mark]

Moin, just a silly question:

I was driving a bit faster on Thursday (212 km/h) and still have the winter tyres on. I then got a message displayed on the speedometer, warning: You are driving with winter tyres and a maximum of 210 km/h is allowed or something like that...

Now the question is, can you adjust and increase the limit somewhere? With my winter tyres, I am allowed to drive a maximum of 240 km/h and I then, out of shock, eased off the accelerator...

Thank you very much for the answers in advance, I'm a bit clumsy about this

 

[ekm]

Man muss es einstellen können, da ja das System nicht automatisch erkennt, ob Sommer- oder Winterräder drauf sind. Ich würde spontan mal unter Fahrzeug, Außen und Reifen schauen, da war mEn die Möglichkeit dieser Einstellung. Aber da ich GJR fahre, muss ich mich nicht damit beschäftigen.

 

[Milan]

Ja in den Einstellungen unter Aussen > Räder kannst Du das Limit aktivieren und einstellen. Dort setzt man auch das RDKS zurück

 

[Ice-Mark]

Perfekt, danke euch beiden

 

[derblaue]

Abgesehen davon würde ICH das Tempolimit der Reifen nicht ausreizen wollen. Ich habe meine Warnung auch konservativ eingestellt.

Die Tempoangabe der Reifen wird nämlich nur für ein paar (8?) Minuten geprüft und hängt auch noch vom KORREKTEN Luftdruck, der Ausreizung des Lastindex, Beladung des Autos, möglicher Mini-Schäden durch Randsteinklettern, ... ab.

Natürlich macht es nichts aus, mal kurz an oder vielleicht ? sogar über die Grenze zu gehen.

Das kurze Bimmeln stört mich dann nicht, genausowenig wie die häufigere 120 km/h-Warnung, damit mein Führerschein länger bei mir bleibt ;-)


FunFact
Mein Sohn hatte mal mit seinem 440i GC bei um die 180 an beiden Hinterrädern gleichzeitig die gesamte Lauffläche der WR verloren

 

[Ice-Mark]

Vielen Dank für deine Erklärung.

Habe die Grenze des Bimmeln nun auf 230 gestellt, die Reifen können bis 240. Will die auch nicht komplett ausreizen, aber bei 210 war es dann doch ein wenig zu früh für mich, und es kommt auch extrem selten vor bei mir, wo ich das mal fahren kann/will.

Gilt denn deine Begründung denn auch genauso für die Sommerreifen?

Danke für deine Hilfe!

 

[dantheman]

@derblaue

Why not? According to the testing standard ECE-R 30 , the tyre is tested in such a way that it can theoretically be driven at the maximum speed index indefinitely. One just needs to ensure that the air pressure is set accordingly. However, what many do not know is that the load capacity decreases. For a tyre approved for 240 km/h (Index V), only up to 210 km/h is 100% of the load capacity covered. At 240 km/h, it is only 91% of that, so one must strictly consider the vehicle's load when driving "permanently" near the tyre's maximum. These approvals generally apply only to a brand-new tyre. In 99.9% of cases, one will be slowed down by other road users before even approaching a thermal overload of the tyres.

A tread separation usually has other causes (cheap tyres, pre-existing damage, index too low for the chosen speed, or simply overloading). Furthermore, it does not happen "suddenly"; it announces itself through vibrations in the steering wheel as well as loud rumbling.

 

[Ice-Mark]

Danke @dantheman Thanks for the explanation.

 

[dantheman]

@Ice-Mark

But of course, that’s what a Forum is for.

 

[derblaue]

My and danthemans' better/more precise considerations/explanations naturally also apply to summer tyres.

Mine, however, are approved up to 300 km/h, so they are uncritical in that regard.

By the way, the winter tyres with the tread separation that my son experienced were from Michelin. He assured me convincingly that despite his BMW's 370 hp, he never pushed them to the limit.

And whether he heard a rumbling shortly before (? how many seconds would be conceivable?) is probably relatively irrelevant at 180. I often hear certain other sounds from different asphalt surfaces, where I also don’t immediately lift off the throttle.

Steering wheel wobble in a rear-wheel drive car and a rear axle defect I consider rather unlikely ;-)

Regarding the topic "you can’t drive fast for that long," please consider that additional stresses are introduced into the tyres precisely through braking and acceleration (as well as through centrifugal forces in fast corners, e.g. Kassler Berge ;-)) that you might not have on a rolling test bench.

But whatever, I do it this way; everyone can do it differently. In any case, I definitely don’t want to have tyre damage at 200+ km/h; my instinct for self-preservation is too strong for that.

By the way, my speed warning is and remains set at 210 all year round, and I only ever exceed it briefly.

 

[dantheman]

@derblaue

I think we are somewhat talking past each other.
It’s not about saying “uncritical, nothing will happen”, but about how the standard technically assesses the whole thing. According to ECE-R30, the tyre is precisely designed to be operated continuously at the speed index – under the defined conditions.

And that’s exactly the point:
Tyre pressure, load capacity, and condition must be correct. I specifically mentioned that the load capacity decreases with increasing speed – for me, that is more of an argument for conscious driving as opposed to that.

Regarding the Michelin case: Of course, things like that happen. But that’s exactly why you look at the typical causes – and from experience, these usually do not lie in a properly operated tyre “just failing” within the intended range.
I also stand by what I said about the announcements: In many cases, there are prior signs such as vibrations or noises. That you can’t always clearly identify these at 180 km/h is another matter – but “completely without warning” is more the exception than the rule.

In summary:
I have no problem with brisk driving – but it must be backed by technical understanding. And for me, that includes knowing the framework conditions of the approvals and not just looking at the number on the sidewall in isolation.

 

[derblaue]

My answers were primarily for the thread starter.

We are not far apart. You, dantheman, describe the regulation, I describe my instinct for self-preservation, since you can never completely rule out a manufacturing defect or other damage.

 

[Ice-Mark]

Unterm Strich sind meine Reifen zwar bis 240 km/h ausgelegt, aber nur wenn die anderen Faktoren stimmen und auch nicht auf dauerhaftes fahren ausgelegt.
Das ist dass, was ich nun für mich mitnehme. Ich danke euch beiden, werde hier und da die 200er Marke für mich dennoch überschreiten, aber nicht ans Limit gehen, da mir das Leben von mir und meiner Familie auch zu wichtig ist!

Nochmals Danke an euch beiden