Tire Pressure - Tiffin Motorhomes WAYFARER 2017 Owner's Manual

ROUTINE MAINTENANCE
Wheel center member—In the case of a non-pneumatic tire assembly incorporating a wheel, a
mechanical device which attached, either integrally or separable, to the non-pneumatic rim and
provides the connection between the non-pneumatic rim and the vehicle; or, in the case of a non-
pneumatic tire assembly not incorporating a wheel, a mechanical device which attaches, either
integrally or separable, to the non-pneumatic tire and provides the connection between tire and the
vehicle.

TIRE PRESSURE

Correct tire inflation pressure is essential to maximizing the life of the tires and assuring the safety of
the vehicle and its occupants. Driving with tires that are not correctly inflated for the load of the
motorhome is dangerous and may cause premature wear, tire damage, and/or loss of control of the
motorhome.
An underinflated tire will build up excessive heat that may actually approach the vulcanization
temperature of the rubber and lead to tread separation and/or disintegration of the tire.
Underinflated tires will also cause poor handling of the motorhome, rapid and/or irregular tire wear,
and an increase in rolling resistance of the motorhome which, in turn, produces a decrease in fuel
economy of operation.
An overinflated tire will reduce the tire's "footprint" (i.e., its actual contact with the road); thus,
reducing the traction, braking capacity, and handling of the motorhome. A tire that is over-inflated for
the load that it is carrying will also contribute to a harsh ride, uneven tire wear, and the tire itself will be
more susceptible to impact damage.
Maintaining correct tire pressure for each loaded wheel position on the motorhome is critically
important and must be a part of regular vehicle maintenance.
Tire Maximum Load Rating
Federal law requires that the maximum load rating be molded into the sidewall of the tire. If you look at
a tire sidewall, you may see some "typical" information, such as:
Max. Load Single 2880 Lbs at 85 psi cold
Max. Load Dual 2470 Lbs at 85 psi cold
The maximum load allowed for the size tire and load rating and the minimum cold air-inflation pressure
needed to carry that stated maximum load are noted on the tire. Using less air pressure would reduce
the load-carrying capacity of the tire.
The amount of air pressure you need depends on the weight of the fully loaded motorhome. You
cannot determine the correct air-inflation pressure, unless you know the actual weights of the
motorhome.
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