Michelin Air Pressure
Keeping your tires properly inflated is
essential for the proper performance & longevity of the tire. Not to
mention, the ride quality & safety of your vehicle. Your tires carry the
entire weight of your vehicle. When underinflated or overinflated, they
cannot do their job properly. Operating your tires underinflated can also
result in sudden tire failure.
We recommend checking air pressure once a month, & before a long trip.
Whether you have a full-sized or mini-spare, make sure that it is properly
inflated as well.
Always inflate your tires to the recommended pressure listed by your
vehicle's manufacturer. This information can be found in the owner's manual
& often on a placard located in the vehicle's door jamb, inside the fuel
hatch, or on the glove compartment door.
The Best Time to Inflate
Air expands when it's hot & contracts when it's cold. For accurate
pressure, always check the pressure when the tires are "cold" — at least
three hours after the vehicle has been stopped & before it has been driven
one mile. It's best to inflate your tires in the morning before the day's
For example, it is possible for a passenger tire initially inflated to 35
psi to lose 1/2 psi per month. A substantial, seasonal temperature change
can also affect inflation pressure, with cold ambient temperatures causing
effectively lower air pressure.
Valves & Valve Caps
The tire's valve is a very important maintenance item in terms of keeping
the inflation air in your tires. These valves are ordinarily rubber, can
deteriorate over time, & should be replaced when you buy new tires. At
high speeds, a cracked, deteriorated rubber valve stem can bend from
centrifugal force & allow air loss.
The valve cap is likewise an important item. Buy some good quality valve
caps that can contain the inflation air should the core of the valve fail
for any reason. Valve caps also keep out moisture, which could freeze & in
turn depress the valve core, causing loss of air. The cap also keeps out
dust & dirt particles, which could also interfere with the proper
operation of the valve core & cause loss of air.
Purchase a good pressure gauge & check it for accuracy with your Michelin
Beware of public gauges at the gas station. They are often abused &