07 Wheels and tires
Uniform tire quality gradings
07
184
Uniform tire quality gradings
ALL PASSENGER VEHICLE TIRES MUST
CONFORM TO FEDERAL SAFETY
REQUIREMENTS IN ADDITION TO THESE
GRADES
Quality grades can be found, where appli-
cable, on the tire sidewall between the tread
shoulder and maximum section width. For
example:
Treadwear 200 Traction AA
Temperature A
TREADWEAR
The treadwear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course. For example, a tire gra-
ded 150 would wear one and one half (1 1/2)
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 many depart signifi-
cantly from the norm due to variation in driving
habits, maintenance practices and differences
in road characteristics and climate.
TRACTION
The traction grades, from highest to lowest, are
AA, A, B, and C, as measured under controlled
conditions on specified government test sur-
faces of asphalt and concrete. A tire marked C
may have poor traction performance. The trac-
tion grade assigned to this tire is based on
braking (straight-ahead) traction tests and is
not a measure of cornering (turning) traction.
WARNING
The traction grade assigned to this tire is
based on braking (straight-ahead) traction
tests and is not a measure of cornering
(turning) traction.
TEMPERATURE
The temperature grades are AA (the highest),
A, B, and C, representing the tire's resistance
to the generation of heat and its ability to dis-
sipate heat when tested under controlled con-
ditions 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 corre-
sponds to a minimum level of performance that
all passenger vehicle tires must meet under the
Federal Motor Safety Standard No. 109.
Grades B and A represent higher levels of per-
formance on the laboratory test wheel than the
minimum required by law.
WARNING
The temperature grade for this tire is estab-
lished for a tire that is properly inflated and
not overloaded. Excessive speed, under-
inflation, or excessive loading, either sepa-
rately or in combination, can cause heat
buildup and tire failure.
Summary of Contents for 2010 C70
Page 1: ...VOLVO C70 Owner s manual Web Edition ...
Page 2: ......
Page 8: ...Contents 8 12 12 Index Index 278 ...
Page 9: ...Contents 9 ...
Page 15: ...01 SAFETY ...
Page 45: ...02 INSTRUMENTS AND CONTROLS ...
Page 81: ...03 CLIMATE ...
Page 89: ...03 Climate 03 89 ...
Page 91: ...04 INTERIOR ...
Page 108: ...04 Interior Storage compartments 04 108 ...
Page 117: ...05 LOCKS AND ALARM ...
Page 133: ...05 Locks and alarm 05 133 ...
Page 135: ...06 STARTING AND DRIVING ...
Page 169: ...06 Starting and driving 06 169 ...
Page 171: ...07 WHEELS AND TIRES ...
Page 197: ...07 Wheels and tires 07 197 ...
Page 198: ...G020920 198 Washing and cleaning the car 200 Paint touch up 204 ...
Page 199: ...08 CAR CARE ...
Page 205: ...08 Car care 08 205 ...
Page 207: ...09 MAINTENANCE AND SERVICING ...
Page 235: ...09 Maintenance and servicing 09 235 ...
Page 237: ...10 AUDIO ...
Page 261: ...10 Audio 10 261 ...
Page 263: ...11 SPECIFICATIONS ...
Page 264: ...11 Specifications Label information 11 264 ...
Page 285: ......
Page 286: ...Kdakd 8Vg 8dgedgVi dc IE JH6 8VcVYV 6I Eg ciZY c HlZYZc iZWdg 8deng i Kdakd 8Vg 8dgedgVi dc ...