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09 Wheels and tyres
09
316
Tyres - load index
Load index indicates a tyre's ability to carry a
certain load.
Each tyre has a certain capacity to carry a
load, a load index (LI). The car's weight deter-
mines the load capacity required of the tyres.
Related information
•
Tyres - dimensions (p. 315)
•
Tyres - speed ratings (p. 316)
•
Tyres - air pressure (p. 314)
•
Tyres - tread wear indicators (p. 314)
Tyres - speed ratings
Each tyre can withstand a certain maximum
speed and therefore belongs to a particular
speed rating (SS - Speed Symbol).
Tyre speed class must at least correspond
with the car's top speed. The table below
indicates the maximum permitted speed that
applies for each speed rating (SS). The only
exception to these conditions is winter
tyres (p. 317) (both those with metal studs
and those without), where a lower speed rat-
ing may be used. If such a tyre is chosen, the
car must not be driven faster than the speed
rating of the tyre (for example, class Q can be
driven at a maximum of 160 km/h). Traffic
regulations determine how fast a car can be
driven, not the speed rating of the tyres.
NOTE
The maximum permitted speed is speci-
fied in the table.
Q 160 km/h (used only on winter tyres)
T 190 km/h
H 210 km/h
V 240 km/h
W 270 km/h
Y 300 km/h
WARNING
The car must be fitted with tyres which
have the same or a higher load index
(p. 316) (LI) and speed rating (SS) than
specified. If a tyre with too low a load
index or speed rating is used, it may over-
heat.
Related information
•
Tyres - dimensions (p. 315)
•
Tyres - air pressure (p. 314)
•
Tyres - direction of rotation (p. 313)
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