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controlled conditions on specified govern-
ment test surfaces of asphalt and concrete.
A tire marked C may have poor traction per-
formance.
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.
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 tempera-
ture can lead to sudden tire failure. The
grade C corresponds to a level of perform-
ance which all passenger car tires must
meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades Band 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 es-
tablished for a tire that is properly inflated
and not overloaded. Excessive speed, un-
derinflation, or excessive loading, either
separately or in combination, can cause
heat buildup and possible tire failure.
RSC – Run-flat tires
Run-flat tires, refer to page 259, are labeled
with a circular symbol containing the let-
ters RSC marked on the sidewall.
M+S
Winter and all-season tires with better cold
weather performance than summer tires.
Tire tread
Summer tires
Do not drive with a tire tread of less than
0.12 in/3 mm, otherwise there is an in-
creased risk of hydroplaning.
Winter tires
Do not drive with a tire tread of less than
0.16 in/4 mm, as such tires are less suitable
for winter operation.
Minimum tread depth
Wear indicators are distributed around the
tire's circumference and have the legally re-
quired minimum height of 0.063 in-
ches/1.6 mm.
The positions of the wear indicators are
marked on the tire sidewall with TWI, Tread
Wear Indicator.
Seite 256
MOBILITY Wheels and tires
256
Online Edition for Part no. 01405A1E4E3 - II/20
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