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06 Maintenance and specifications
207
Wheels and tyres
06
Specifications
Designation of dimensions
The dimensions are stated on all car tyres.
Example of designation:
225/50R17 94 W.
Speed ratings
The car is approved as a whole, which means
that dimensions and speed ratings must not
differ from those specified on the car’s regis-
tration document.
The only exception to these conditions is
winter tyres (both those with metal studs and
those without). 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.
Tyre pressure
• Tyre pressure for the car’s recommended
wheel dimension
•ECO pressure
• Spare wheel pressure (Temporary Spare)
The tyre pressure decal on the driver’s side
door pillar (between frame and rear door)
shows which pressures the tyres should have
at different loads and speed conditions, this
is also specified in the tyre pressure table,
see page 208.
225 Section width (mm)
50 Ratio between section
height and width (%)
R Radial ply
17 Rim diameter in inches (")
94 Tyre load index
W Speed rating (in this case
270 km/h).
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
NOTE
It is the maximum permitted speed that is
stated in the table.
NOTE
Temperature differences change tyre pres-
sure.
7700650s