Example:
The load bearing index 91 is equivalent to a
maximum load of 1356 lbs (615 kg) that the
tire can carry. For further information on the
maximum tire load in kilograms and pounds,
see (
For further information on the load bearing
index, see Load index (
Speed rating: speed rating
B
specifies the
approved maximum speed of the tire.
Even when permitted by law, never operate a
vehicle at speeds greater than the maximum
speed rating of the tires.
Exceeding the maximum speed for which tires
are rated can lead to sudden tire failure,
causing loss of vehicle control and possibly
resulting in an accident and/or serious
personal injury and possible death, for you
and for others.
Regardless of the speed rating always
observe the speed limits. Drive carefully and
adapt your driving style to the traffic
conditions.
Summer tires
Index
Speed rating
Q
Up to 100 mph (160 km/h)
R
Up to 106 mph (170 km/h)
S
Up to 112 mph (180 km/h)
T
Up to 118 mph (190 km/h)
H
Up to 130 mph (210 km/h)
V
Up to 149 mph (240 km/h)
W
Up to 168 mph (270 km/h)
Y
Up to 186 mph (300 km/h)
ZR...Y
Up to 186 mph (300 km/h)
Summer tires
Index
Speed rating
ZR...(..Y) Above 186 mph (300 km/h)
ZR
Above 149 mph (240 km/h)
R
Optionally, tires with a maximum speed of
over 149 mph (240 km/h) may have "ZR"
in the size description depending on the
manufacturer (e.g. 245/40 ZR 18).
The service specifications consist of load
bearing index
A
and speed rating
B
.
R
If the size description of your tire includes
"ZR" and there are no service
specifications, ask the tire manufacturer in
order to find out the maximum speed.
If a service specification is available, the
maximum speed is limited according to the
speed rating in the service specification.
Example: 245/40 ZR 18 97 Y. In this
example, "97 Y" is the service specification.
The letter "Y" represents the speed rating
and the maximum speed of the tire is
limited to 186 mph (300 km/h).
R
Every tire that has a maximum speed above
186 mph (300 km/h) must have "ZR" in the
size description
and the service
specification must be given in brackets.
Example: 275/40 ZR 18 (99 Y). The speed
rating "(Y)" shows that the maximum speed
of the tire is above 186 mph (300 km/h).
Ask the tire manufacturer to find out the
maximum speed.
All-weather tires and winter tires
Index
Speed rating
Q M+S
24
Up to 100 mph (160 km/h)
T M+S
24
Up to 118 mph (190 km/h)
H M+S
24
Up to 130 mph (210 km/h)
V M+S
24
Up to 149 mph (240 km/h)
24
Or M+S
i
for winter tires.
460
Tire labeling
Wheels and tires
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