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Ii_deralstandards,Thenexttwonumbersorlettersaretheplantcodewhereit was
manufactured,andthe[astlburnumbersrepresenttheweekandyear the tire was
built For example, the numbers 3[97 means the 3 tst week of 1997. The other
numbers are marketing codes used at the manufacturer's discretion, This
information is used to contact consumers ifa tire defect requb'es 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 ofplies, tile more weight a tire can support
Tire manufacturers also must indicate the materials in tbe tire, which include steel,
nylon, polyester, and otbers.
Maximum Load Rating: This number indicates the maximmn load in kilograms
and pounds that can be carried by the tire
Maximum Permissible Inflation Pressure: lhis number is the greatest amount
of air pressure that should ever be put in the tire under normal driving conditions
6Ao10.2 UTQGS Information
Tread-wear Number: "Ftrismnnber indicates the tire's wear _ate The bigber the
tread-wear 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: _his tether indicates a tire's ability to stop on wet pavement A
bigber graded tire shoutd allow you to stop your car on wet roads in a shorter
distance than a tire with a tower grade Traction is graded from highest to lowest as
"AA","A", '_B",and _'C"
Temperature Letter: This letler indicates a tire's resistance to heat The
tempelamre grade is [br a th-e that is inflated property and not overloaded
Excessive speed, under inflation or excessive loading, either separately or in
combination, can cause beat build-up and possible tire failure. From highest to
lowest, a tire's resistance to heat rs graded as A , B , or
6o4.10,3. Additional Information on Light Truck Tires
Please refer to the following diagram: M_lxlmumload
Load & intlafion when
rllll |ised _ls II dultl
Sc_,'¢ t _ snow
I, igh_ truck tire
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