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09 Wheels and tyres
09
319
Wheel and wheel rim dimensions
Wheel and rim dimensions are designated in
accordance with the examples in the table
below.
The car has an approval for the complete
vehicle. This means that certain combinations
of wheel (wheel rim) and tyre are approved.
Wheels (rims) have a designation of dimen-
sions, for example: 7Jx16x50.
7 Rim width in inches
J Rim flange profile
16 Rim diameter in inches
50 Off-set in mm (distance from wheel
centre to wheel contact surface
against the hub)
Related information
•
Tyres - dimensions (p. 319)
•
Tyres - approved tyre pressures (p. 420)
Tyres - dimensions
The car's tyres have a certain dimension, see
the examples in the table below.
The dimensions are stated on all car tyres.
Example of designation: 235/60 R18 103 V.
235 Tyre width (mm)
60 Ratio between tyre wall height and
tyre width (%)
R Radial ply
18 Rim diameter in inches
103 Codes for the maximum permitted
tyre load, tyre load index (LI)
V Speed rating for maximum permitted
speed, speed rating (SS). (In this
case 240 km/h.)
The car has an approval for the complete
vehicle with certain combinations of wheel
rims and tyres.
Related information
•
Tyres - speed ratings (p. 320)
•
Tyres - load index (p. 319)
•
Tyres - direction of rotation (p. 316)
•
Tyres - maintenance (p. 315)
•
Tyres - approved tyre pressures (p. 420)
•
Wheel and wheel rim dimensions (p. 319)
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.
Minimum permissible index is indicated in the
load index table.
Related information
•
Tyres - dimensions (p. 319)
•
Tyres - approved tyre pressures (p. 420)
•
Tyres - speed ratings (p. 320)
•
Tyres - maintenance (p. 315)
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