<VV> tire pressure gauge

[J R Read]

Hi Frank,

Essentially I agree with the points you make.  I disagree with some - 
especially the one below:

PASTE

Who cares if the best feel is
20, 30, or 40 on some arbitrary gauge, as long as you can repeat it?

END PASTE

40psi is too high for most tires - which generally have a max rating on the 
sidewall of around 35.  Filling a cool tire to 40 and then taking it on a 
summer time road trip could be hazardous to your continued good health. 
This is likely true even if the gauge being used reads 5psi on the high side 
(I assume that most don't).

You are right that the TPMS only shows the low side.  Just give that one a 
few more years and the rules will change again!

Regarding repeatable, my practice is to check (same gauge) each tire a 
minimum of twice - and 3 - even 4 times if the first two did not agree. 
Each car has a gauge in the glove box and the one I feel is most accurate is 
on the bench in the garage (near the compressor) in a coffee can marked "air 
tools".  The glove box gauges rarely get used.

Later, JR


----- Original Message ----- 
From: "Frank DuVal" <corvairduval at cox.net>
To: <virtualvairs at corvair.org>
Sent: Tuesday, February 07, 2012 10:47 PM
Subject: Re: <VV> Fwd: Reality check WAS Need tire pressure gage 
buyingadvice


 Now if your gauge is not repeatable, you need a new gauge.

And if tire pressure varies by 1 psi per 10 °F, then you can get a 4 or
so psi change in our current daily weather! TPMS lights coming on all
over the beltway?

The actual number of psi in your tires is not as important as how a
particular pressure feels to the driver. Who cares if the best feel is
20, 30, or 40 on some arbitrary gauge, as long as you can repeat it?
NIST traceability is not important here.


Keep your very accurate gauges. I will continue using my collection of
gauges that vary by over +/- 3 psi.

Flame suit on. ggg

Frank DuVal