Geo 1995 Prizm Owner's Manual page 232

Inflation
-
Tire Pressure
The Tire-Loading Information label which is in your
glove compartment shows the correct inflation pressures
for your tires, when they're cold. "Cold" means your
vehicle has been sitting for at least three hours or driven
no more than
a
mile.
NOTICE:
Don't let anyone tell you that underinflation or
overinflation is all right. It's not. I f your tires
don't have enough air (underinflation) you can
get:
0
Too much flexing
Too much heat
0
Tire overloading
0
Bad wear
Bad handling
Bad fuel economy.
NOTICE: (Continued)
NOTICE: (Continued)
If
your tires have too much
air
(overinflation),
you can get:
0
Unusual wear
0
Bad handling
0
Rough ride
0
Needless damage from road hazards.
When to Check
Check your tires once a month or more.
Don't forget your compact spare tire. It should be at
60 psi (420 kPa).
How to Check
Use a good quality pocket-type gage to check tire
pressure. Simply looking at the tires will not tell you the
pressure, especially if you have radial tires
--
which
may look properly inflated even if they're underinflated.
If your tires have valve caps, be sure to put them back
on. They help prevent leaks by keeping out dirt and
moisture.
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