Honda Civic Sedan 2005 Owner's Manual page 173

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Tires
Inflation Guidelines
Keeping the tires properly inflated
provides the best combination of
handling, tread life, and riding
comfort.
Underinflated tires wear unevenly,
adversely affect handling and fuel
economy, and are more likely to
fail from being overheated.
Overinflated tires can make your
vehicle ride more harshly, are
more prone to damage from road
hazards, and wear unevenly.
We recommend that you visually
check your tires every day. If you
think a tire might be low, check it
immediately with a tire gauge.
172
Use a gauge to measure the air
pressure at least once a month. Even
tires that are in good condition may
lose one to two 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
three hours, or driven less than 1
mile (1.6 km). Add or release air, if
needed, to match the recommended
cold tire pressures on page
If you check air pressures when the
tires are hot (driven for several
miles), 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
173 . 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.