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 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.
See also:
Safety
Six airbags, including front-seat side-impact and side curtain-type devices,
are standard. All-disc antilock brakes include brake assist. GM's StabiliTrak
electronic stability system is standard. ...
Total Weight on the Vehicle's Tires
Be sure the vehicle's tires are inflated to the upper limit for cold tires.
These numbers can be found on the Certification label or see Vehicle Load
Limits for more information. Make sure not to go ...
Safety System Check
Now and then, check that the safety belt reminder light, safety belts, buckles,
latch plates, retractors, and anchorages are all working properly. Look for any
other loose or damaged safety belt s ...