From: xenolith@optusnet.com.au   
      
   On 4/5/20 10:11 pm, thekmanrocks@gmail.com wrote:   
   > Xeno:   
   >   
   > Of course the tire sidewalls will slowly buckle! Common sense!  They're the   
   vertical   
   > component of a tire.  But what you seem to want to believe is that the only   
   part of a   
   > tire that matters is that which touches the ground.  In your world,   
   sidewalls don't exist.   
   > In your world, a vehicle drives by and all you see are the treads and the   
   rims.   
      
   You have me 100% wrong. I was not disagreeing with you. My point was   
   that the sidewalls also have pressure acting on them and that helps   
   keeps them where they need to be. As well, the poster to whom you   
   responded omitted to mention, in his detailing of pressure acting at the   
   contact patch, is that it also acts in the upwards direction on the   
   inner rim surface opposite the inner rim surface. Tyres are not designed   
   by just looking at the contact patch to determine the inflation pressure   
   hence the load carrying capacity.   
      
    > In your world, a vehicle drives by and all you see are the treads and   
    > the rims.   
      
   Having been a mechanic for over 50 years, my view of a tyre is very   
   different from yours. I look at it as a sub-component of the vehicle,   
   its relationship to steering and suspension and, most importantly,   
   handling.   
      
   Two primary factors determine the load carrying capacity of a tyre, the   
   load and the inflation pressure. If you want to increase the load, you   
   need to increase the pressure. This is well known and is included in   
   vehicle owners manuals. The rub here is that there are many other forces   
   acting on tyres, lateral and centrifugal forces being just two, and each   
   needs to be considered, especially in relation to speed. Therefore the   
   service use of the tyre becomes important as well.   
   >   
   > It doesn't work that way. A tire - all of it - and the wheel or rim it's   
   attached to, are   
   > together a SYSTEM: of support, of absorption, of compliance, and of traction   
   during   
   > a variety of vehicle dynamics.   
      
   See above.   
   >   
   > And whether a fully mounted, inflated, and balanced wheel/tire combo is   
   sitting, waiting   
   > to be put on a car, or is between that car and the road already, the air   
   inside places   
   > pressure on ALL interior surfaces of the cavity created by tire plus rim.    
   Science!   
   >   
   Well aware of that. Not my point. BTW, a tyre waiting to be put on a car   
   is *different* to a tyre on a car at 100 mph. Think heat and what that   
   does to a tyre and the pressure inside it.   
      
      
      
   --   
      
   Xeno   
      
      
   Nothing astonishes Noddy so much as common sense and plain dealing.   
          (with apologies to Ralph Waldo Emerson)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)