Tire Chains - Chevrolet Spark 2022 Owner's Manual

164 Vehicle Care
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
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 (1½) 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
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.
Temperature
The temperature grades are A (the highest),
B, and C, representing the tire's resistance to
the generation of heat and its ability to
dissipate heat when tested under controlled
conditions on a specified indoor laboratory
test wheel. Sustained high temperature can
cause the material of the tire to degenerate
and reduce tire life, and excessive
temperature can lead to sudden tire failure.
The grade C corresponds to a level of
performance which all passenger car tires
must meet under the Federal Motor Safety
Standard No. 109. Grades B and A represent
higher levels of performance on the
laboratory test wheel than the minimum
required by law. Warning: The temperature
grade for this tire is established for a tire
that is properly inflated and not overloaded.
Excessive speed, underinflation, or excessive
loading, either separately or in combination,
can cause heat buildup and possible tire
failure.

Tire Chains

Tire chains are only permitted on the front
wheels.
Always use fine mesh chains that add no
more than 10 mm to the tire tread and the
inboard sides (including chain lock).
Warning
Damage may lead to tire blowout.
Tire chains are only permitted on tires of
size 165/65 R14.