FOUR WINDS INTERNATIONAL 2007 Presidio, Owner'S Manual

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PRESIDIO
Vehicle manufacturers determine this number based on the vehicle’s design load limit, that is,
the greatest amount of weight a vehicle can safely carry and the vehicle’s tire size. The proper
tire pressure for the motorhome is referred to as the “recommended cold inflation pressure”.
(As you read below, it is difficult to obtain the recommended tire pressure if the tires are not
cold.)
Because tires are designed to be used on more than one type of vehicle, tire manufacturers list
the “maximum permissible inflation pressure” on the tire sidewall. This number is the greatest
amount of air pressure that should ever be put in the tire under normal driving conditions.
It is important to check your motorhomes tire pressure before each trip for the following
reasons:
• Most tires may naturally lose air over time
• Tires can lose air suddenly if you drive over a pothole or other object or if you strike
the curb when parking
• With radial tires, it is usually not possible to determine under inflation by visual
inspection
NOTE: For convenience, purchase a tire pressure gauge to keep in the motorhome.
Gauges can be purchased at tire dealerships, auto supply stores, and other retail outlets.
The recommended tire inflation pressure that vehicle manufacturers provide reflects the
proper psi when a tire is cold. The term cold does not relate to the outside temperature.
Rather, a cold tire is one that has not been driven on for at least three hours. When you drive,
your tires get warmer, causing the air pressure within them to increase. Therefore, to get an
accurate tire pressure reading, you must measure tire pressure when the tires are cold or
compensate for the extra pressure in warm tires.
To maintain tire safety, purchase new tires that are the same size and rating as the motorhomes
original tires or another size recommended by the manufacturer. Look at the tire information
placard, the chassis owner’s manual, or the sidewall of the tire you are replacing to find this
information. If you have any doubt about the correct size to choose, consult with the tire
dealer and chassis manufacturer.
4-3
CHASSIS OPERATIONS & PROCEDURES
Checking Tire Pressure
Tire Size