Operation Manual

5. Two-digit number (16): This number is
the wheel or rim diameter in inches.
6. Two- or three-digit number (94): This
number is the tire’s load index. It is a
measurement of how much weight
each tire can support. You may not
find this information on all tires be-
cause it is not required by law.
7. H: Tire speed rating. You should not
drive the vehicle faster than the tire
speed rating.
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2
TIN (Tire Identification Number) for a
new tire (example: DOT XX XX XXX
XXXX)
1. DOT: Abbreviation for the “Depart-
ment of Transportation”. The symbol
can be placed above, below or to the
left or right of the Tire Identification
Number.
2. Two-digit code: Manufacturer’s iden-
tification mark
3. Two-digit code: Tire size
4. Three-digit code: Tire type code (Op-
tional)
5. Three-digit code: Date of Manufacture
6. Four numbers represent the week and
year the tire was built. For example,
the numbers 3103 means the 31st
week of 2003. If these numbers are
missing, then look on the other side-
wall of the tire.
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3
Tire ply composition and material
The number of layers or plies of
rubber-coated fabric in the tire.
Tire manufacturers also must indi-
cate the materials in the tire, which
include steel, nylon, polyester, and
others.
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4
Maximum permissible inflation pres-
sure
This number is the greatest amount
of air pressure that should be put in
the tire. Do not exceed the maximum
permissible inflation pressure.
Example
SDI1607
8-32 Maintenance and do-it-yourself