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 a 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
–
AA, A, B, C
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
–
A, B, C
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.
6-75
Содержание 2010 HHR
Страница 6: ...2 NOTES vi ...
Страница 8: ...Instrument Panel 1 2 ...
Страница 44: ...5 Pull up on the knob located on the top of the seatback on the outboard side to release the seatback 2 12 ...
Страница 48: ...Put someone on it Get it up to speed Then stop the vehicle The rider does not stop 2 16 ...
Страница 112: ...2 NOTES 2 80 ...
Страница 166: ...2 NOTES 3 54 ...
Страница 190: ...Instrument Panel Cluster United States Manual Transmission Cluster shown Automatic SS and Canada similar 4 24 ...
Страница 262: ...2 NOTES 4 96 ...
Страница 320: ...When you open the hood on the 2 0L L4 engine this is what you will see 6 18 ...
Страница 441: ...Engine Drive Belt Routing Dotted line shows routing for vehicles without air conditioning 7 13 ...
Страница 443: ...Maintenance Record cont d Date Odometer Reading Serviced By Services Performed 7 15 ...
Страница 444: ...Maintenance Record cont d Date Odometer Reading Serviced By Services Performed 7 16 ...
Страница 462: ...2 NOTES 8 18 ...