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CHASSIS
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.
D.O.T. Code
The last four digits on tires manufactured after the year
2000 signify the week and year of manufacture.
The tire in the example picture was made during the
29th week of 2017.
D.O.T. Example
This article provides information about the care and maintenance of your coach tires, including examples of labels and tire
pressure charts. To ensure your tires are operating safely, regularly inspecting your tires and checking your tire pressure is
absolutely mandatory.
Tire Care and Maintenance
Tire Size Example
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.
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.
IMPORTANT
!
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.
WARNING
!
The tire pressure settings can change depending
on whether they are used in single or dual tire
situations.
IMPORTANT
!
Summary of Contents for Mountain Aire 2022
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