Besides the difference among tires' sidewall construction and stiffness you
would also have to contend with 'where' the deflection was measured and
what the material's temperature was and, just guessing, that the sidewall
stiffness probably changes with age and mileage. Better to wait until all
TPMS systems catch up with the most advanced types which give a direct
readout of each tire's pressure rather than the present 'too low' indication.
I gave up on tire gauges years ago. I can thump a tire, which is hit it
with my fist, and tell by the sound when it's at the proper level. When
checked with a gauge, I'm always nearly exact to the proper inflation.
Of course this is something that you cant just learn. But in my older
age, I just know the right sound. Tire gauges are cheap, but no matter
where you put them, they are never found when needed it seems.
In response to a question about how the tire low inflation works, there are
two types. THe newest one uses actual pressure monitor in thevalve stem.
The older version, compared the number of revolutions of tires compared to
the revolutions of the other tires. If one tire, over a period of maybe a
mile or two, showed a highernumber of revolutions, that tire would be like
ly to be low on pressure unles the vehicle was driven in circles for a long
On Friday, December 12, 2014 at 9:40:22 AM UTC-5, KenK wrote:
Buying a *good* tire pressure gauge with a good chuck on it makes checking
pressure less frustrating. Good chuck especially, I want one that will go
on and off with minimal pressure loss. My local speed shop just had a sale
on "last year's model" Longacre dial/hose type gauges for $20 so I bought
a new one and gave my old one to a kid who didn't have one at all.
Which reminds me, I better actually check that the new one works before the
returns window runs out :)
Better yet, I used a Cornwell digital inflator last time I was at my friend
's shop with a locking chuck, damn that is a sweet tool. Apparently there'
s a new Cornwell rep in the area who's aggressively trying to catch all the
shops his predecessor missed... sure that one isn't $20 though.
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