TIRE SIZE
The sidewall of the tire contains information that is important to
know to ensure proper use of the tire, as well as to maintain long
life. Take the time to become familiar with the size, load rating, and
pressure information listed on the sidewalls of the tires.
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.
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.
WARNING
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.
IMPORTANT
The tire pressure settings can change depending on whether they are used in single or dual tire situations.
IMPORTANT
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.
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