Temperature
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.
Temperature grade for this tire
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.◀
RSC – Run-flat tires
The symbol identifying run-flat tires is a circle with the letters RSC on the sidewall
M+S
Winter and all-season tires.
These have better winter properties than summer tires.
XL
Designation for specially reinforced tires.
See also:
Pressure specifications
The tire inflation pressure table, refer to
page 238, contains all pressure specifications
for the specified tire sizes at the ambient temperature.
Pressure specifications apply to approved
tire ...
Warning stages
Prewarning
This warning is issued, for example, when there
is the impending danger of a collision or the distance
to the vehicle ahead is too small.
Acute warning
Warning of the imminent danger ...
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