Tire Inflation Pressures

CAUTION: Models 2500 and 3500 now use a high pressure snap-in tire valve. Do not substitute with other tire valves. The Tire and Rim industry designations are TR413 for low pressure and 600HP for high pressure.

Fig. 4:

Under inflation causes rapid shoulder wear and tire flexing.

Fig. 5:

Over inflation causes rapid center wear and loss of the tire's ability to cushion shocks.
Improper inflation can cause;
- Uneven wear patterns
- Reduced tread life
- Reduced fuel economy
- Unsatisfactory ride
- Cause the vehicle to drift

Refer to the Tire Inflation Pressure brochure for information regarding proper tire inflation. This information is provided with the Owner's Manual.
This pressure has been carefully selected to provide for safe vehicle operation. Tire pressure should be checked cold once a month. Tire pressure decreases when the outside temperature drops.
Inflation pressures specified on the placards are always cold inflation pressure. Cold inflation pressure is obtained after the vehicle has not been operated for at least 3 hours. Tire inflation pressures may increase from 2 to 6 pounds per square inch (psi) during operation. Do not reduce this normal pressure build-up.
Vehicles loaded to the maximum capacity should not be driven at continuous speeds above 75 mph (120 km/h).

WARNING: OVER OR UNDER INFLATED TIRES CAN AFFECT VEHICLE HANDLING AND MAY RESULT IN LOSS OF VEHICLE CONTROL.