This tire size is 315 / 80 R 22.5.
From this size, we can
determine
the physical dimensions of the tire, as well as its
basic construction.
The tire size breaks down like this:
• The first number, “315”, is the section width of the tire in
millimeters.
The section width is the measurement of the
tire
from the outside sidewall to the inside sidewall.
• The second number is the height of the sidewall,
expressed as
a percentage of the section width.
In this
case, the number is
“80”, so the sidewall height accounts for
80 percent
of the tire's
section width.
• The “R” in the tire size indicates that this tire is “radial” in
construction.
The belts are wrapped around the tire in a
radial
design, from bead to bead.
• The final number is “22.5”, which is the rim size the tire
was designed to fit. This tire fits a 22.5” diameter wheel.
Tire Care and Maintenance
To ensure your tires are operating safely, regularly inspecting
your tires
and checking
your tire pressure
is absolutely
mandatory.
Failure to follow proper inflation guidelines may result in tire failure, which can cause loss of vehicle control or
accidents resulting in property damage, bodily injury, or death.
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Tire pressures should be checked and adjusted before and
after each
trip. Always check
and adjust the pressures
while the tires are
cold.
Never add or release pressure from
the tires when they are hot (after
having driven a mile or
more).
For safe operation and maximum weight carrying capacity,
it is
imperative that the tires be inflated to and maintained at
the listed tire
pressures on the Federal ID Tag. This tag is
affixed to the interior wall
just behind the driver’s seat in
your coach.
The tire pressure settings can change depending on whether they are used in single or dual tire situations.
Make sure the tire pressures are the same across an axle, while never exceeding the maximum air pressure
limit stamped on the wheels or tires, or leaving a tire below the minimum pressure listed on your tire inflation
chart.
If you are operating your coach while staying significantly under the maximum weight carrying capacity, you may
experience an unnecessarily firm ride. To correct this condition, it is recommended for you to weigh the coach when it is
fully loaded
as you would travel, with full fuel, water, and LP tanks, all travelers, and
your belongings, as well as any
towed equipment. Weigh each axle end separately, and use the heaviest end weight to determine the axle's cold
inflation
tire pressure.