Hyundai 2013 Genesis User Manual download pdf (Page 378)

Maintenance

447

Traction - AA, A, B & C

The traction grades, from highest to

lowest, are AA, A, B and C. Those

grades represent the tire’s ability to

stop on wet pavement as measured

under controlled conditions on spec-

ified government test surfaces of

asphalt and concrete. A tire marked

C may have poor traction perform-

ance.

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 condi-

tions 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 cor-

responds 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 labora-

tory test wheel than the minimum

required by law.

WARNING

The traction grade assigned to

this tire is based on straight-

ahead braking traction tests,

and does not include accelera-

tion, cornering, hydroplaning,

or peak traction characteristics.

WARNING - Tire

temperature

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

build-up and possible sudden

tire failure. This can cause loss

of vehicle control and serious

injury or death.

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