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Ride Comfort And Vehicle Stability
Proper tire inflation contributes to a comfortable ride. Over-inflation produces a jarring
and uncomfortable ride.
Tire Inflation Pressures
The proper cold tire inflation pressure is listed on the driver's side B-Pillar or rear edge
of the driver's side door.
At least once a month:
• Check and adjust tire pressure with a good quality pocket-type pressure gauge. Do not
make a visual judgement when determining proper inflation. Tires may look properly
inflated even when they are under-inflated.
• Inspect tires for signs of tire wear or visible damage.
CAUTION!
After inspecting or adjusting the tire pressure, always reinstall the valve stem cap. This
will prevent moisture and dirt from entering the valve stem, which could damage the
valve stem.
Inflation pressures specified on the placard are always “cold tire inflation pressure”. Cold
tire inflation pressure is defined as the tire pressure after the vehicle has not been driven
for at least three hours, or driven less than 1 mile (1.6 km) after sitting for a minimum
of three hours. The cold tire inflation pressure must not exceed the maximum inflation
pressure molded into the tire sidewall.
Check tire pressures more often if subject to a wide range of outdoor temperatures, as
tire pressures vary with temperature changes.
Tire pressures change by approximately 1 psi (7 kPa) per 12°F (7°C) of air temperature
change. Keep this in mind when checking tire pressure inside a garage, especially in the
Winter.
Example: If garage temperature = 68°F (20°C) and the outside temperature = 32°F
(0°C) then the cold tire inflation pressure should be increased by 3 psi (21 kPa), which
equals 1 psi (7 kPa) for every 12°F (7°C) for this outside temperature condition.
Tire pressure may increase from 2 to 6 psi (13 to 40 kPa) during operation. DO NOT
reduce this normal pressure build up or your tire pressure will be too low.
Tire Pressures For High Speed Operation
The manufacturer advocates driving at safe speeds and within posted speed limits. Where
speed limits or conditions are such that the vehicle can be driven at high speeds, main-
taining correct tire inflation pressure is very important. Increased tire pressure and re-
MAINTAINING YOUR VEHICLE
200
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