XPost: comp.mobile.android, misc.phone.mobile.iphone   
   From: nuh-uh@nope.com   
      
   On 2022-04-30 6:27 p.m., Xeno wrote:   
   > On 1/5/2022 8:33 am, WaltS48 wrote:   
   >> On 4/30/2022 11:12 PM, Xeno wrote:   
   >>>> More to the point, only people with abnormally low IQ fall for   
   >>>> paying extra   
   >>>> for air that has a visible green cap but which has no practical value.   
   >>>   
   >>> For what its worth, using nitrogen in tyres is just another way to   
   >>> suck people into a *regular subscription payment* when they top up   
   >>> their tyres.   
   >>   
   >> It doesn't help the tires but it helps the tire provider's bottom   
   >> line, or   
   >> they wouldn't bother to do it.   
   >>   
   >> BTW, what did you think about the claim from somebody that steep twisty   
   >> mountain driving doesn't wear tires any more than driving on flat roads   
   >> does?   
   >   
   > The camber gain from KPI/SAI will always wear tyres more on the outside   
   > edge during high or full lock turns. Mountain driving, with sharp   
   > hairpin bends, will guarantee it. Even in normal city street driving,   
   > camber gain will be prevalent and worse on the nearside tyre. If you   
   > have a comprehensive understanding of steering and suspension design,   
   > then it is quite an easy thing to visualise. Weber Auto, on You Tube,   
   > did something on steering some time back and, IIRC, they explained the   
   > aspect of KPI/SAI that causes the issue. It is not a well understood   
   > issue, even in the trade, but is *one* of the reasons tyre rotation is   
   > essential. Just turn your steering to full lock and look at the camber   
   > angle of the *inside* wheel - camber gain will be very evident. The   
   > effect is worse if the vehicle has wider low profile tyres.   
   >   
      
   Just a little follow up:   
      
   'If we now compare the effects in Figs. 7.16 and 7.17, we can see that   
   if kingpin is introduced first, undesirable positive camber results from   
   steering but if castor is then added in, negative camber is introduced.   
   By including both camber and castor, the designer can have the benefits   
   of kingpin inclination but offset the disadvantageous camber gain. For   
   this reason, it is common to introduce approximately equal amounts of both.'   
      
      
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)