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The letters “DOT” certify compliance with all applicable safety standards established by
the U.S. Department of Transportation (DOT). Adjacent to this is a tire identification or
serial number. This serial number is a code with up to 12 digits that are a combination
of numbers and letters. The last characters are numbers identifying the week and year
of manufacture. (For example, “1502” means the fifteenth week of the year 2002.)
The DOT requires tire manufacturers to grade passenger car tires based on three
pe
rformance factors: Treadwear, Traction and Temperature resistance. (See the
“Uniform Tire Quality Grading (UTQG)” section for more details.)
The sidewall also shows the type of cord and the number of plies in the sidewall and
u n
der the tread.
TYPICAL LIGHT TRUCK TIRE
UNIFORM TIRE QUALITY GRADING (UTQG)
The Uniform Tire Quality Grading (UTQG) standards are intended to assist you in making
an informed choice in your purchase of passenger car tires by providing information
indicating relative performance in the areas of treadwear, wet stopping traction, and
temperature resistance. All passenger car tires must conform to federal safety
requirements in addition to these grades.
• Treadwear - The treadwear grade is a comparative rating based on the wear rate of the t
ire tested under controlled conditions on a specified government test track. For
example, a tire graded 200 would wear twice as long on the government course as a
tire graded 100. It is wrong to link treadwear grades with your projected tire mileage.
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6. Do not use snow chains on your YOKOHAMA® high pressure spare. This could cause damage to your vehicle.
7. W hen the tread wear indicator appears on the tire, replace it only with the same type
s
pare tire.
8. C heck the tire’s cold inflation pressure monthly and maintain at 60 psi (4.2 kg/cm2)
e
ven when not in use. Do not inflate over 60 psi.
9. T he YOKOHAMA® high pressure spare tire should not be used with any other rim nor
s
hould standard tires, wheel covers, or trim rings be used on the YOKOHAMA® high
pressure spare tire rim on which the YOKOHAMA® high pressure spare tire was orig -
inally installed.
IMPORTANT SAFETY INFORMATION
All tires require owner maintenance regardless of how well a tire is constructed.
Operational damages such as punctures, impact damage, cuts, incorrect inflation, etc.,
may cause tire failure and subsequent personal injury and/or property damage. Simple
operational and maintenance practices, as listed below, will reduce the chances of tire
problems.
Tire Inspection
Visually inspect your tires frequently for any tire damage such as scrapes, bulges, cuts,
nails, irregular wear, etc. resulting from operation. This must be done immediately after
any known or suspected contact with an object in the road, a pothole, road irregularity or
after severe braking. Refer these conditions to a reputable tire service center for repair
or replacement. Never drive on a tire if such conditions appear.
Tire Loading
Never exceed the maximum vehicle load limit listed on the vehicle placard, tire
information label or in the Owner’s Manual. Be aware of the load carrying limits molded
into the tire’s sidewall and do not exceed those limits. Maximum load can only be carried
at the maximum cold inflation pressure indicated on the tire’s sidewall.
Speed Limits
Regardless of the speed capability of your tires, never exceed lawful speeds or speeds
dictated by driving conditions.
Hazards
Objects in the road that could damage your tires should be safely avoided. These objects
include: potholes, glass, metal, rocks, wood debris and the like. Unavoidable contact
should prompt a thorough tire inspection.
Air Pressure
Air pressure maintenance is critical to tire service life. Tire pressures must be checked
frequently when tires are cold (before operation, cool to the touch) and no less than once