On Fri, 23 May 1997 10:00:37 -0500 (CDT) todd@nutria.nrlssc.navy.mil
(Todd Mullins) writes:
>Eddie Sheffield writes:
>
>> Does this hold true for tires and wheels that are bigger/smaller
>than
>> those originally supplied? Obviously the weight and distribution
>would
>> be the same, but would different tire/wheel combinations react to
>this
>> weight distribution differently and require some other PSI to
>maintain a
>I'm afraid I don't know. I once read in _european car_ that the
>optimum
>PSI was unrelated to tire/wheel size; IOW, when going to larger wheels
>or wider tires, the OEM recommended tire pressures were still valid!
>
>Surely one of our SCCA guys can comment?
>
>--
>
>Todd Mullins
>Todd.Mullins@nrlssc.navy.mil On the lovely Mississippi (USA)
>Coast
>
>'74 MGB Tourer with 185/70R14s - 32F 37R
>
>That's me at the corner.
>That's me at the stoplight,
>Losing my transmission...
>
Todd,
I think you are basically right. All the information I've read on
tires/pressures, etc lead to the conclusion that for a given car with
basically the same tire construction. (Wrinkle wall drag slicks being a
different matter) the operating pressure will remain basically the same,
only varying slightly (1-3 lbs) due to variations in actual tires.
I'm running 195/60 X14 Pirelli's and am quite happy with the basic
pressures recommended by the owners manual. (27 F; 22 R). Although I do
go up by about 5 lbs for long distance freeway driving.
Rick
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