Tire Labeling; Dot Tire Quality Grading - Honda Clarity ELECTRIC 2018 Owner's Manual

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Tire Labeling

The tires that came on your vehicle have a number of markings. Those you
should be aware of are described below.
Here is an example of what each marking means:
215/50R17 94V
215: tire width in millimeters
50: aspect ratio (tire section height as a
percentage of its width)
R: tire construction code (radial)
17: rim diameter in inches
94: load index (code indicating maximum
load tire can carry)
V: speed symbol (code indicating
maximum speed rating)
Tire Identification Number (TIN)
n
The tire identification number (TIN)
is a group of numbers and letters
that look like the example shown.
TIN is located on the sidewall of
the tire.
Glossary of Tire Terminology
n
Cold Tire Pressure – The tire air pressure when the vehicle has been parked
for at least three hours or driven less than 1 mile (1.6 km).
Load Rating – The maximum load that a tire is rated to carry for a given
inflation pressure.
Maximum Inflation Pressure – The maximum tire air pressure that the tire
can hold.
Maximum Load Rating – The load rating for a tire at the maximum
permissible inflation pressure for that tire.
Recommended Inflation Pressure – The cold tire inflation pressure
recommended by the manufacturer.
Treadwear Indicators (TWI) – The projections within the principal grooves
designed to give a visual indication of the degrees of wear of the tread.
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Tire size
Tire
identification
number (TIN)
Maximum
tire load
Maximum
tire pressure
Tire size
DOT B97R FW6X 2209
DOT: This indicates that the tire meets all
requirements of the U.S. Department of
Transportation.
B97R: Manufacturer's identification mark
FW6X: Tire type code
22 09: Date of Transportation
Year
Week

DOT Tire Quality Grading

The tires on your vehicle meet all U.S. Federal Safety Requirements. All tires are
also graded for treadwear, traction, and temperature performance according
to Department of Transportation (DOT) standards. The following explains these
gradings.
Uniform Tire Quality Grading
n
Quality grades can be found where applicable on the tire sidewall between
tread shoulder and maximum section width.
For example:
Treadwear 200
Traction AA
Temperature A
All passenger car tires must conform to Federal Safety Requirements in
addition to these grades.
Treadwear
n
The treadwear grade is a comparative rating based on the wear rate of the
tire when tested under controlled conditions on a specified government test
course.
For example, a tire graded 150 would wear one and one-half (1 1/2) times
as well on the government course as a tire graded 100. The relative
performance of tires depends upon the actual conditions of their use,
however, and may depart significantly from the norm due to variations in
driving habits, service practices, and differences in road characteristics and
climate.
Traction
n
The traction grades, from highest to lowest, are AA, A, B, and C. Those
grades represent the tire's ability to stop on wet pavement as measured
under controlled conditions on specified government test surfaces of
asphalt and concrete. A tire marked C may have poor traction performance.
WARNING: The traction grade assigned to this tire is based on straight-
ahead braking traction tests and does not include acceleration, cornering,
hydroplaning, or peak traction characteristics.
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