Double A Trailers Gooseneck Series, Owner'S Manual

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Numbers of 70 or lower indicate a short sidewall
for improved steering response and better overall
handling on dry pavement.
R
: The “R” stands for radial. Radial ply construction
of tires has been the industry standard for the past 20
years.
Next number: This two-digit number is the wheel or
rim diameter in inches. If you change your wheel size,
you will have to purchase new tires to match the new
wheel diameter.
Next number: This two- or three-digit number is the
tire’s load index. It is a measurement of how much
weight each tire can support. You may find this
information in your owner’s manual. If not, contact a
local tire dealer. Note: You may not find this information
on all tires because it is not required by law.
M+S: The “M+S” or “M/S” indicates that the tire has
some mud and snow capability. Most radial tires have
these markings; hence, they have some mud and
snow capability.
Speed Rating: The speed rating denotes the speed
at which a tire is designed to be driven for extended
periods of time.
Note: You may not find this information on all tires
because it is not required by law.
U.S. DOT Tire Identification Number : This begins
with the letters “DOT” and indicates that the tire meets
all federal standards. The next two numbers or letters
are the plant code where it was manufactured, and the
last four numbers represent the week and year the tire
was built. For example, the numbers 3197 means the
31st week of 1997. The other numbers are marketing
codes used at the manufacturer’s discretion. This
information is used to contact consumers if a tire
defect requires a recall.
Tire Ply Composition and Materials Used: The
number of plies indicates the number of layers of
rubber-coated fabric in the tire. In general, the greater
the number of plies, the more weight a tire can support.
Tire manufacturers also must indicate the materials
in the tire, which include steel, nylon, polyester, and
others.
Maximum Load Rating: This number indicates the
maximum load in kilograms and pounds that can be
carried by the tire.
Maximum Permissible Inflation Pressure: This
number is the greatest amount of air pressure that
should ever be put in the tire under normal driving
conditions.
3.5.10.2
UTQGS Information
Treadwear Number
: This number indicates the tire’s
wear rate. The higher the treadwear number is, the
longer it should take for the tread to wear down. For
example, a tire graded 400 should last twice as long as
a tire graded 200.
Traction Letter : This letter indicates a tire’s ability to
stop on wet pavement. A higher graded tire should allow
you to stop your car on wet roads in a shorter distance
than a tire with a lower grade. Traction is graded from
highest to lowest as “AA”,”A”, “B”, and “C”.
Temperature Letter: This letter indicates a tire’s
resistance to heat. The temperature grade is for a tire
that is inflated properly and not overloaded. Excessive
speed, under inflation or excessive loading, either
separately or in combination, can cause heat build-up
and possible tire failure. From highest to lowest, a tire’s
resistance to heat is graded as “A”, “B”, or “C”.
3.5.10.3
Additional Information On Light Truck
Tires
Tires for light trucks have other markings besides those
found on the sidewalls of passenger tires.
LT : The “LT” indicates the tire is for light trucks or
trailers.
Tire Safety