Uniform Tire Quality Grading Standards (U.s. Vehicles) - Mercedes-Benz GL450 Operator's Manual

Always follow the recommended tire
inflation pressure ( page 389) for proper
tire inflation.
Warning!
Never exceed the max. tire inflation
pressure. Follow recommended tire inflation
pressures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly, adverse-
ly affect handling and fuel economy, and are
more likely to fail from being overheated.
Do not overinflate tires. Overinflated tires
can adversely affect handling and ride com-
fort, wear unevenly, increase stopping dis-
tance, and result in sudden deflation
(blowout) because they are more likely to
become punctured or damaged by road de-
bris, potholes etc.
Uniform Tire Quality Grading Standards
(U.S. vehicles)
Tire manufacturers are required to grade
G tires based on three performance factors:
treadwear, traction and
temperature resistance.
1 Treadwear
2 Traction
3 Temperature resistance
i
For illustration purposes only. Actual data
on tires are specific to each vehicle and may vary
from data shown in above illustration.
Tires and wheels
Quality grades can be found, where appli-
cable, on the tire sidewall between tread
shoulder and maximum section width. For
example:
Treadwear Traction Temperature
200 AA A
All passenger car tires must conform to
federal safety requirements in addition to
these grades.
Operation
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