theadmiral94

how to identify runflats: e.g. original Goodyear runflats had a 'EMT' in a semi-triangle shaped spot on the tire's side-wall. Other brands should have some marking on the sidewall to identify them as a run-flat or zero-pressure tire.

If your gauge is correct, and you could not tell the tire was low, then you might have run-flats.

Beware the Goodyears were rated for 500 miles without air, many others only 50 miles.

So if you've been running with zero pressure in excess of those miles, the tire might need to be replaced.

P.S. to all on original post topic -- my 94, with brand new FX3s with original Goodyear run-flats (from a 95) and all original suspension - 30 PSI rode like a truck -- 33 PSI rode like a cadillac, difference was AMAZING.

tntwolt

my concern is, will 30+lbs cause center of tires to wear out, 26lbs give me the "wigglelis" on turns/

gerardvg

Not at all its still the outer edges that wear most, I have gone thru a few sets of tires over the last fifteen years I never run lower than 35 psi mostly 38 psi.
You will be amazed at how much better your vette sticks to the road at higher pressures especially in wet weather
Also braking is greatly affected if your tire pressure is low
Everything works better around 35 psi except for ride smoothness