Cadillac 2000 Catera Owner's Manual download pdf (Page 288)

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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 Vehicle 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.

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 on 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 bolts keep coming loose, the wheel

and wheel bolts should be replaced. If the wheel leaks

air, replace it (except some aluminum wheels, which can

sometimes be repaired). See your dealer if any of these

conditions exist.

Your dealer will know the kind of wheel you need.

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Cadillac 2000 Catera Owner's Manual Page 288