The following tire qualities are designed in order to obtain maximum length of service under normal operating conditions:

The tires are made in order to operate efficiently only on a specified amount of air. Unless the driver of the vehicle maintains the correct air pressure, the tires will not function as intended.

An underinflated tire may cause the vehicle to operate in the following manners:

In dual tire mounting, loss of pressure in one tire could cause the rim to slip on the wheel.

Overinflation may weaken the tire, causing a blow-out. Improperly inflated tires will affect the following conditions:

Inflate the tires as indicated by the manufacturer's recommendation:

Ensure that the combined front and rear tire load do not exceed the maximum recommended load.

Inflate the tires to the recommended pressure when the tires are cool. If the tires are always carrying less than the recommended maximum load, reduce the air pressure to correspond with the actual load carried.

Never bleed the tires in order to relieve pressure buildup. Tire temperature and air pressure will increase when the tire is in service. Tire design allows for this buildup in pressure. Tire temperature and air pressure will stay within limits that are not harmful to the tire when used with the recommended load and air pressure.

The followings conditions may be responsible for high pressure buildup:

Use the size and type of tire that has the capacity to carry the load at a recommended cold starting pressure.

All tires on the same axle should always carry the same air pressure. Although a difference in air pressure of the rear and the front tires may be allowed, within certain limitations, you should not tolerate a difference in pressures between the right and the left tires on the same axle.

A 34 kPa (5 psi) underinflated tire can lower the efficiency of most brakes. Balanced tire inflation contributes to the following conditions:

At periodic intervals, use an accurate gage in order to check each tire for pressure loss. If you notice a pressure loss in any of the tires, complete the following steps:

1. Make an inspection.
2. Determine the cause of the pressure loss.
3. Correct the problem.

As a tire becomes heated, the air in the tire expands and the air pressure rises. This is a normal condition, unless the pressure buildup is excessive. Increased tire pressure over 138 kPa (20 psi) is excessive. Increased tire pressure indicates the following conditions:

Investigate pressure buildups of over 138 kPa (20 psi) in order to determine the cause of the buildups. Take proper corrective action. Normal pressure buildups, not over 138 kPa (20 psi), reduce flexing.

Heat balance is defined as the temperature at which the rate of heating equals the rate of cooling. Normal pressure buildup reaches this heat balance at a lower temperature than by frequently bleeding the air in order to maintain the inflation pressure. Never bleed the tires. When the pressure builds up excessively, reduce the speed or the load.