Beiträge von harkpabst

  • Zymexx Felge zerkratzt

    Wie die Beispiele schon zeigen, gibt es natürlich Unterschiede von Reifen zu Reifen. Insbesondere gibt es ja manche Typen ausdrücklich mit Felgenschutzleiste, manchmal sogar Ausführungen mit oder ohne. Bei 8" Maulweite dürfte es aber sehr schwierig werden, einen wirklich wirksamen Schutz zu finden, wie man an den Fotos von sil-ber gut sieht.


    205er Reifen sind übrigens laut ETRTO grundsätzlich nicht auf 8" breiten Felgen empfohlen. 215/40 wäre die einzige empfohlene Kombination, die auf dem ND problemlos möglich ist. 215/45 ginge natürlich auch. Fahren einige hier, steht auch in manchen Gutachten drin, ist aber eigentlich wegen der Tachoabweichung potentiell problematisch.

  • Datensammlung Fahrwerksfedern

    Zitat von weeblebiker

    Many thanks for the information and the driving impressions of the STX compared to the B16.

    there is technical meaning in the translation with deepl distorted which changes the intent of the qeustions.


    apparently if you cut and paste the Deeple English-German translation into the webpage using Google Chrome web browser and Google German-English translate on, it translates the inserted German into English when you post it on the German page

    Just to be perfectly clear: This posting as well my previous one were written in English by me, not Google. So the inconsistencies, quirks and errors were all mine. I hope this removes at least the ambiguities of machine translation.


    In this forum it is generally accepted to post content in English. Feel free to post your comments and questions in your native language. This way each party involved in the discussion will have to deal with translation issues only at once, hopefully avoiding translation queues.

  • Datensammlung Fahrwerksfedern

    I don't think there is any real difference, we are talking different things here. Sheikh has measured the spring translation ratio R as 0.6545 front and 0.8756 rear. These are almost the same values Svanniversary has used for his calculations (0.63 front an 0.88 rear). R² is needed to translate raw spring rates to effective spring rates at the wheel.


    The difference between static hight and full bump in stock condition isn't really important (especially if the car is lowered, obviously). The essential thing to look for is the effective spring rate ratio front/rear and - consequently - the resulting ratio of natural frequencies front/rear (taking into account secondary spring rates caused by anti roll bars). As Svanniversary laid out in his initial post the theoretical optimum of the latter is somewhere between 0.91 and 0.95. E


    However, these are all rough estimations. Everything that doesn't deviate grossly should be fine. Raw spring rates proven to work fine (on aftermarket coilovers) are values like 70/40, 60/40, 50/30.


    Bump stops may also play a vital role here when cornering. As far as I know they have not been taken into account at all. However, some cars - especially running lowering springs on stock dampers - may actually be just millimeters from touching the bump stops at static height already. In this case the effective spring rate might change rather dramatically through high speed corners.


    Damping will also have a slight influence on the natural frequency (higher damping has the tendency to lower the natural frequency), thus on the natural frequency ratio when set differently for front and rear. If you opt for adjustable dampers you have one further degree of freedom fighting the annoying highway bouncing.


    I have personally owned the ST X and now own the Bilstein B16 (adjustable dampers). I found the ST X ride quality to be absolutely fine, but didn't fully understand the issue of imbalanced spring rates back then. As a result my wheel alignments never yielded the expected results, I've been hunting ghosts for many months.


    I consider the B16 to be pretty much on par comfort wise. I don't attribute the all too obvious stick-slip effect seen with the OEM Bilstein dampers to them being monotube, but rather to general construction and build quality. The effective spring rate ratio is a tad on the oversteering side in theory but I can't really confirm this in practice.


    People have tried the ST X with 60/40 springs here (although it cannot be done legally) and the results were below optimum. The front axle shows as being slightly underdamped and there is no way to compensate for this due to missing adjustability.


    Go figure ...



    Hint to German speaking readers:

    Ich glaube, es ist für den Adressaten einfacher zu verstehen, wenn ich das direkt auf Englisch schreibe, als wenn er es erst durch deepl.com jagen muss. Falls es jemanden interessieren sollte, der des Englischen nicht mächtig ist: DeepL funktioniert in beiden Richtungen. Ist aber nichts Neues dabei gewesen.

  • Silvers Neomax N vs. Neomax S

    Oder man schaut sich die "historische" Einstellbühne von SPS einmal an und stellt fest, dass die Werte nicht automatisch vom Computer ermittelt werden. 😇


    Über die Präzision, mit der man damit tatsächlich einstellen kann (es sind schon Laserprojektionen am Werk) will ich damit ausdrücklich nichts (Negatives) gesagt haben. Der Ausdruck ist eben nur nicht direkt vergleichbar.

  • Allgemeine Reifendiskussion

    Zitat von Schwarzangler82

    Und was denkt ihr sonst so, was die Fahrbarkeit dieser Kombination angeht? Ich weiß dass ein 205 eigentlich „besser“ zu einer 7j passt.

    195/40 auf 7x17 ist nach den öffentlich zugänglichen (also nicht offiziellen) ETRTO-Tabellen grundsätzlich absolut zulässig. Im TGA deiner Felgen steht die Größe trotzdem nicht (nur unter der Rubrik "seltsame Mischbereifungen").


    Mir ist ja schon bei 205/45 R17 zu wenig Gummi auf der Felge, deswegen enthalte ich mich da jeder Spekulation, wie sich das fährt.