Honda Civic Owner's Manual page 252

Tires
Use a gauge to measure the air
pressure in each tire at least once a
month. Even tires that are in good
condition may lose 1 to 2 psi (10 to
20 kPa, 0.1 to 0.2 kgf/cm ) per
month. Remember to check the
spare tire at the same time.
Check the air pressures when the
tires are cold. This means the
vehicle has been parked for at least 3
hours, or driven less than 1 mile (1.6
km). Add or release air, if needed, to
match the recommended cold tire
pressures.
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If you check air pressures when the
tires are hot [driven for several miles
(kilometers)], you will see readings 4
to 6 psi (30 to 40 kPa, 0.3 to 0.4
kgf/cm ) higher than the cold
readings. This is normal. Do not let
air out to match the recommended
cold air pressure. The tire will be
underinflated.
You should get your own tire
pressure gauge and use it whenever
you check your tire pressures. This
will make it easier for you to tell if a
pressure loss is due to a tire problem
and not due to a variation between
gauges.
While tubeless tires have some
ability to self-seal if they are
punctured, you should look closely
for punctures if a tire starts losing
pressure.
Recommended Tire Pressures
The following charts show the
recommended cold tire pressures for
most normal driving conditions.
(DX, Canadian DX-G)
Tire Size Cold Tire Pressure
P195/65R15 89H Front/Rear:
30 psi (210 kPa ,
2.1 kgf/cm )
(LX, EX)
Tire Size Cold Tire Pressure
P205/55R16 89H Front/Rear:
32 psi (220 kPa ,
2.2 kgf/cm )
(U.S Si)
Tire Size Cold Tire Pressure
P215/45R17 87V Front:
32 psi (220 kPa ,
2.2 kgf/cm )
Rear:
29 psi (200 kPa ,
2.0 kgf/cm )