Chevrolet 1997 Astro Bedienungshandbuch PDF herunterladen (Seite 304)

Traction

The traction grades, from highest to lowest, are

€3,

and

and they represent the tire’s ability to stop on wet

pavement as measured under controlled conditions on

specified government test surfaces

asphalt and concrete.

tire marked

may have poor traction performance.

Warning: The traction grade assigned to this tire is based

on braking (straightahead) traction tests and does not

include cornering (turning) traction.

Temperature

The temperature grades

are

(the highest),

and

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

corresponds to a level of performance

which all passenger car tires must meet under the

Federal Motor Vehicle Safety Standard

No.

109.

Grades

and

represent higher levels of performance

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.

Wheel Alignment and Tire Balance

The wheels on your vehicle were aligned and balanced

carefully at the factory to give you the longest tire life

and best overall performance.

Scheduled wheel alignment and wheel balancing are not

needed. However, if you notice unusual tire wear or

your vehicle pulling one way or the other, the alignment

may need to be reset. If you notice your vehicle

vibrating when driving

a smooth road, your wheels

may need to be rebalanced.

Wheel Replacement

Replace any wheel that is bent, cracked, or badly rusted

or corroded. If wheel nuts keep coming loose, the wheel,

wheel bolts and wheel nuts should be replaced. If the

wheel leaks air, replace

(except some aluminum

wheels, which can sometimes be repaired). See your

GM dealer if any

these conditions exist.

Your dealer will know the kind of wheel you need.

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