1999 Nissan Sentra Owner's Manual - Page 213

1999 Nissan Sentra Manual

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UNIFORM TIRE QUALITY GRADING ● Crosswinds and rough roads adversely affect vehicle/trailer handling, possibly causing vehicle sway. When being passed by larger vehicles, be prepared for possible changes in crosswinds that could affect vehicle handling. If swaying does occur, firmly grip the steering wheel, steer straight ahead, and immediately (but gradually) reduce vehicle speed. This combination helps to stabilize the vehicle. Never increase speed. ● Be careful when passing other vehicles. Passing while towing a trailer requires considerably more distance than normal passing. Remember the length of the trailer must also pass the other vehicle before you can safely change lanes. ● To maintain engine braking efficiency and electrical charging performance, do not use fifth gear (manual transmission) or overdrive (automatic transmission). ● Avoid holding the brake pedal down too long or too frequently. This could cause the brakes to overheat, resulting in reduced braking efficiency. When towing a trailer, change the oil in the transmission more frequently. For additional information see the ''Maintenance'' section earlier in this manual. DOT Quality Grades: All passenger car tires must conform to Federal Safety Requirements in addition to these grades. 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 WARNING The traction grade assigned to your vehicle tires is based on straight-ahead braking traction tests, and does notinclude acceleration cornering, hydroplaning, or peak traction characteristics. Treadwear Treadwear grade is a comparative rating based on tire wear rate when tested under controlled conditions on specified government test courses. For example, a tire graded 150 would wear one and a half (1-1/2) times as well on the government course as a tire graded 100. However, relative tire performance depends on actual driving conditions, and may vary significantly due to variations in driving habits, service practices and differences in road characteristics and climate. Temperature A, B and C Temperature grades are A (the highest), B, and C. They represent a tire's resistance to heat build-up, and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause tire material to degenerate, reducing tire life. Excessive temperatures can lead to sudden tire failure. Grade C corresponds to a performance level which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades A and B represent higher levels of performance on laboratory test wheels than the minimum required by law. Traction AA, A, B and C The traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent a 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. 10-18 Technical and consumer information

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●
Crosswinds and rough roads adversely
affect vehicle/trailer handling, possibly
causing
vehicle
sway.
When
being
passed by larger vehicles, be prepared
for possible changes in crosswinds that
could affect vehicle handling. If swaying
does
occur,
firmly
grip
the
steering
wheel, steer straight ahead, and imme-
diately (but gradually) reduce vehicle
speed. This combination helps to stabi-
lize the vehicle. Never increase speed.
●
Be careful when passing other vehicles.
Passing while towing a trailer requires
considerably more distance than normal
passing. Remember the length of the
trailer must also pass the other vehicle
before you can safely change lanes.
●
To maintain engine braking efficiency
and electrical charging performance, do
not use fifth gear (manual transmission)
or overdrive (automatic transmission).
●
Avoid holding the brake pedal down too
long or too frequently. This could cause
the brakes to overheat, resulting in re-
duced braking efficiency.
When towing a trailer, change the oil in
the transmission more frequently. For
additional information see the ‘‘Mainte-
nance’’ section earlier in this manual.
DOT Quality Grades: All passenger car tires
must conform to Federal Safety Require-
ments in addition to these grades.
Quality grades can be found where appli-
cable on the tire sidewall between tread
shoulder and maximum section width. For
example:
Treadwear 200 Traction AA Temperature A
Treadwear
Treadwear grade is a comparative rating
based on tire wear rate when tested under
controlled conditions on specified govern-
ment
test
courses.
For
example,
a
tire
graded 150 would wear one and a half
(1-1/2) times as well on the government
course
as
a
tire
graded
100.
However,
relative tire performance depends on actual
driving conditions, and may vary signifi-
cantly due to variations in driving habits,
service practices and differences in road
characteristics and climate.
Traction AA, A, B and C
The traction grades, from highest to lowest,
are AA, A, B, and C. Those grades repre-
sent a 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 your
vehicle tires is based on straight-ahead
braking traction tests, and does notin-
clude
acceleration
cornering,
hydro-
planing, or peak traction characteris-
tics.
Temperature A, B and C
Temperature grades are A (the highest), B,
and C. They represent a tire’s resistance to
heat build-up, and its ability to dissipate
heat when tested under controlled condi-
tions on a specified indoor laboratory test
wheel.
Sustained
high
temperature
can
cause tire material to degenerate, reducing
tire life. Excessive temperatures can lead to
sudden tire failure. Grade C corresponds to
a performance level which all passenger car
tires must meet under the Federal Motor
Vehicle Safety Standard No. 109. Grades A
and B represent higher levels of perfor-
mance on laboratory test wheels than the
minimum required by law.
UNIFORM TIRE QUALITY
GRADING
10-18
Technical and consumer information