Holiday imperial 2001, Owner'S Manual, Page: 42 / 301

The tire designed for the motorhome is a very technical and precisely
engineered product. To obtain the maximum wear and best service out of the
tires, it is helpful to understand the function of a tire. A tire is a “container”
that holds air. It is the combination of air and tire casing that supports the
motorhome and its contents. In addition, since the tire is the only contact the
motorhome has with the road surface, it must provide other functions such as
traction for moving, stopping, steering and providing a cushion for the
motorhome.
The most important factor in maximizing the life of the tires is maintain-
ing proper inflation. Driving on any tire that does not have the correct infla-
tion pressure for the load of the motorhome is dangerous and may cause pre-
mature wear, tire damage and/or loss of control of the motorhome.
A tire that is underinflated will build up excessive heat that may go
beyond the design limits of the rubber and radial cords. This could result in
sudden failure. A tire that is underinflated will also cause poor motorhome
handling, rapid and/or irregular tire wear and an increase in rolling resistance
which results in a decrease of fuel economy.
Over-inflation will reduce the tire’s footprint/contact patch with the road,
thus reducing traction, braking capacity and handling of the motorhome. A
tire that is over-inflated for the load will have a harsh ride, uneven tire wear
and becomes susceptible to impact damage.
Maintaining correct tire inflation pressure for each loaded wheel position
on the motorhome is of the utmost importance and must be a part of regular
motorhome maintenance.
Federal law requires that the specifications for the tire’s maximum load
rating be molded into the sidewall of the tire. The amount of air pressure to
use is dependent on the weight of the motorhome when it is fully loaded. The
chart within this section shows weights that can be supported by various air
pressures. Utilizing less air pressure means a lesser load can be carried by the
tire.
Driving & Safety
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I M P E R I A L 2 • 4 2
TIRES
The Importance
of Air Pressure
How Much Air
Should I Carry
in My Tires?