Mercedes-Benz Metris Operator's Manual page 284

What you should know about wheels and tires
282
tire load rating and speed rating required for
your vehicle.
Tire width
:
Nominal aspect ration in %
;
Tire code
=
Rim diameter
?
A Load bearing index
B Speed index
Tire width: tire width : shows the nominal tire
width in millimeters.
Aspect ratio: aspect ratio ; is the size ratio
between the tire height and tire width and is
shown in percent. The aspect ratio is calculated
by dividing the tire width by the tire height.
Tire code: tire code = specifies the tire type.
"R" represents radial tires. "D" represents diag-
onal tires, "B" represents diagonal radial tires.
Rim diameter: rim diameter ? is the diameter
of the bead seat, not the diameter of the rim
flange. The rim diameter is specified in
inches (in).
Load-bearing index: load-bearing index A is a
numerical code that specifies the maximum
load-bearing capacity of a tire.
Do not overload the tires by exceeding the
specified load limit. The maximum permissible
load can be found on the vehicle's Tire and
Loading Information placard on the B-pillar on
the driver's side (
Example:
The load-bearing index 101 indicates a maxi-
mum load of 1819 lb (825 kg) for the tire. If two
load-bearing indices are specified, the first num-
ber specifies the load-bearing capacity for single
tires, the second the load-bearing capacity for
twin tires. For further information on the maxi-
mum tire load in kilograms and pounds, see
page 283).
(
Y
page 278).
Y
For further information on the load-bearing
index, see "Load index" (
Speed rating: speed rating B specifies the
approved maximum speed of the tire.
Regardless of the speed index always observe
the speed limits. Drive carefully and adapt your
driving style to the traffic conditions.
i
Tire data is vehicle-specific and may deviate
from the data in the example.
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)
i
Not all tires that have the M+S identification
offer the driving characteristics of winter
tires. In addition to the M+S marking, winter
tires also have the i snowflake symbol on
the tire wall. Tires with this marking fulfill the
requirements of the Rubber Manufacturers
Association (RMA) and the Rubber Associa-
tion of Canada (RAC) regarding the tire trac-
tion on snow. They have been especially
developed for driving on snow.
Further information on the reading of tire infor-
mation can be obtained at any qualified special-
ist workshop.
page 283).
Y