Thediagramsinthissectiongive
you the dimensions and capacities of
your vehicle, and the locations of the
identif ication numbers. It also
includes inf ormation you should
know about your vehicle’s tires and
emissions control systems.................
Identif ication Numbers . 182
................................
Specif ications .184
DOT Tire Quality Grading ......................
(U.S. Vehicles) .186
Unif orm Tire Quality ..................................
Grading .186
.................................
Treadwear .186
......................................
Traction .186
.............................
Temperature .187
.................................
Tire Labeling .188 .......................
Emissions Controls .189
.....................
The Clean Air Act .189
Crankcase Emissions Control ....................................
System .189
Evaporative Emissions Control ....................................
System .189
Onboard Ref ueling Vapor ................................
Recovery .189
...
Exhaust Emissions Controls . 190
....................
PGM-FI System .190
Ignition Timing Control ................................
System .190
Secondary Air Injection ................................
System .190
Three Way Catalytic ...........................
Converter .190
....................
Replacement Parts . 190
..
Three Way Catalytic Converter . 191
..............
State Emissions Testing . 192
T echnical Inf ormat ion
T echnical Inf ormation
181
µ
Quality grades can be f ound where
applicable on the tire sidewall
between the tread shoulder and the
maximum section width. For
example:
All passenger car tires must conf orm
to Federal Saf ety Requirements in
addition to these grades. The treadwear grade is a compara-
tive rating based on the wear rate of
the tire when tested under controlled
conditions on a specif ied government
test course. For example, a tire
graded 150 would wear one and one-
half (1 1/2) times as well on the
government course as a tire graded
100. The relative perf ormance of
tires depends upon the actual condi-
tions of their use, however, and may
depart signif icantly f rom the norm
due to variations in driving habits,
service practices, and dif f erences in
road characteristics and climate.
The traction grades, f rom 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
specif ied government test surf aces
of asphalt and concrete. A tire
marked C may have poor traction
perf ormance.
Warning: The traction grade
assignedtothistireisbasedon
straight-ahead braking traction tests,
and does not include acceleration,
cornering, hydroplaning, or peak
traction characteristics.
The tires on your vehicle meet all
U.S. Federal Saf ety Requirements.
All tires are also graded f or
treadwear, traction, and temperature
perf ormance according to
Department of Transportation
(DOT) standards. The f ollowing
explains these gradings.
DOT T ire Quality Grading (U.S. Vehicles)
Unif orm T ire Quality Grading
T readwear 200
Traction AA
Temperature A Treadwear
Traction AA, A, B, C
186
