On Thursday, May 14, 2020 at 11:58:53 AM UTC-4, Arlen  Holder wrote:   
   > In response to what  wrote :   
   >    
   > > Why wouldn't you want to follow the recommendations set up by BMW   
   themselves, tire pressure    
   > > offset & their alignment?     
   >    
   > You might not like my answer.   
   > HINT: The engineers at BMW don't care one bit about "my" tire wear.   
   >    
   > And, as Xeno is well known to quite accurately state...   
   > o The engineers provide a _range_ where there's a _reason_ it's a range.   
   >    
   > If you corner like a banshee, then minus two degrees rear camber is great.   
   > o But if you care more about tire wear, then 0 degrees camber is just fine.   
   _____________   
   Agreed, about the range in alignment specs.    
      
   For me, I prefer to keep what adjustables there are on my car as close to the   
   middle of that range as possible.   And I NEVER aim for "zero" on any   
   alignment angle - unless zero degrees happens to be right in that middle of   
   range of a given angle.  If    
   the toe for each rear wheel on vehicle XYZ is specified as   
      
   0 to +0.5deg(in), then I'll aim for +0.2-0.3deg - NOT zero.   
      
   If Camber(front or rear) is adjustable and is specified as +0.5 to -1.0 deg,   
   I'll aim for -0.25deg - the MIDDLE of that range.  Most modern aligner   
   software is set up to guide that tech in that fashion anyway.   
      
   The only area I might go aggressive on is Caster angle: as close to the   
   maximum positive attainable - I want that bastard to track as straight as   
   possible and resist my steering effort.   
      
      
   >    
   > As for tire pressure, as they say in the Pirates of the Caribbean...    
   > o They're just "guidelines"...   
   >    
   > In almost all passenger vehicles, I like my pressure higher than nominal...   
   > o For reasons Xeno is well aware of (extreme tight slow speed cornering).   
   >    
   > And, I like my camber closer to neutral (caster also lower than nominal).   
   > o The _range_ is what matters (and the maximum & minimum, of course).   
   >    
   > As long as you don't get close to the maximum & minimum in the range...   
   > o You make your own decisions where you like things within the range.   
   >    
   > Always keeping in mind no subsystem stands alone and unaffected.   
   >    
   > > After all, they did pay engineers to do the work that went into deriving   
   those pressures and alignment    
   > > angles on that vehicle?  Not to mention test drives by both professional   
   drivers and presumably    
   > > members of the buying public, before finalizing those specs.   
   >    
   > I'm not sure why you claim that since it's obvious they "pay engineers".   
   > o Those engineers specified a _range_ for a reason.   
   >    
   > As long as you don't exceed the max and min, you're within the range.   
   > o I'm not sure what your argument is...   
   >    
   > Are you claiming they don't specificy a range?   
   > o I don't understand your dislike of the range they specified?   
   >    
   > It's _never_ a single number & certainly never without measurement error.   
   >    
   > > See, that's the 'MIBy'ism(More-Is-Better) that I have long since rejected.    
   >    
   > Please don't put words in my mouth that I didn't claim.   
   > o I didn't hint at that. I didn't say that. I didn't think that.   
   >    
   > It's a strawman we'll spend the rest of our lives debunking.   
   > o Do not ever claim that I claimed that "more is better"   
   >    
   > Just because I may choose the high end of a range for a given spec.   
   > o Just stop that silliness.    
   _____________   
      
   But that IS "More-is-Betterism", even if you don't inflate your tires to their   
   max cold pressure.     
      
   Most folks you ask like their TV pictures brighter than recommended, or   
   calibrated(think: wheel alignment for your TV - a service I provide at $50/per   
   set)   
      
   It's America Arlen: Bigger, Bolder, Brighter, Louder, More More More! More air   
   in the tires, Faster!  So don't take it personally when I rant on that point.   
      
   Like I said, using my early ignorance of the vehicle sticker, and keeping my   
   tires filled to max plus 5psi,I was a MIBy Extraodinaire, once.  I've matures   
   since those days.   
      
   >    
   >    
   > > I'll admit, I'm a relative    
   > > newcomer to the stickers adhered to the door posts of motor vehicles.From   
   1987 to around 2000,    
   > > I inflated my tires to the Max Cold Pressure on them, PLUS A LITTLE!    
   Yeah, young n dumb you    
   > > could say, lol!    
   >    
   > Tires have evolved since we first started driving in the late fifties and   
   > early sixties, where bias ply tires are completely different from radials.   
   >    
   > For _today's_ passenger tires, IMHO, under "normal" conditions, I keep the   
   > inflation and alignment aimed mostly at tire wear considerations over   
   > "comfort" considerations, and certainly over "cornering like a banshee"   
   > considerations.   
   >    
   > Hence my specs are set to the "I drive like a little old lady" range.   
   >    
   > However, if you wish to set your specs to "I corner like a banshee" range,   
   > I'm not going to argue against that, as long as you corner like a banshee.   
   >    
   > Likewise, if your inflation is set to "I haul lumber every day" range,   
   > then, again, I'm not gonna argue with your inflation set to a hauling   
   > lumber range.   
   >    
   > > But once I discovered what was really on those mysterious placard   
   stickers, it was an epiphany!    
   >    
   > Hhhhmmmmmmm... they're not "mysterious" to me, but to each his own. :)   
   >    
   > To me, I mostly care about the torque of the lug nuts (bolts on the   
   > bimmer), more so than the pressure in the tires.   
   >    
   > Given air pressure never leaks in, and given I don't bother to check for   
   > months, and given the aforementioned "I drive like a little old lady"   
   > style, and given I care more about tire wear, I put the pressure on all my   
   > sedans at around 30 to 45 psi, give or take a few, depending on my mood.   
   >    
   > If I'm going on a long fast trip, I may inflate them higher and if I get   
   > lazy over time, I might let them drop down to around 30 psi, even as BMW   
   > specifies, as I recall offhand, something like 29 psi on the fronts (I'm   
   > not gonna go outside to look).   
   >    
   > Basically, 30 to 45 is what I use, depending on how I feel at that moment.   
   >    
   > Bear in mind, I mount, repair, and balance my own tires, so when I'm   
   > actually setting the bead, I go way above that pressure, temporarily.   
   > o Questions about mounting & balancing new LT tires on new steel rims   
   >   at home (match mounting marks, red dots, yellow dots, & spacers)    
   >    
   >    
   > I strongly suggest you skim that thread, and look at the pictures, for   
   > example, which show that we inflate & balance tires within a "range".   
   >     
      
   [continued in next message]   
      
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